Wildfire smoke Agency determination
Daily PM2.5 peaked at 210.1 µg/m³ near Cleveland across 42 covered metros home to 97 million people. 4 metros recorded their worst day on record; 33 placed a top-ten day.
Counting the extra PM2.5 above each metro's typical day, this event handed the average affected resident ≈ 7.6 cigarettes. Across everyone living in the affected metros, that is the collective equivalent of ≈ 735 million cigarettes. An awareness illustration of outdoor exposure at 22 µg/m³ per cigarette (Berkeley Earth), counting only the event's ranked days; not a medical dose.
Why we think this happened
Qualified supplied evidence supports wildfire smoke for this event. It is grouped with 13 other supplied events because the evidence identifies Canada as the shared origin and the affected intervals form one continuous 2023-06-26 through 2023-07-01 occurrence. Qualified supplie
Agency determination A government body issued a record naming this cause for this event: an NWS air-quality alert, a NOAA Storm Events record, or a state or local official archive.
U.S. EPA Air Quality System and the submitting air monitoring agency · Jun 27, 2023 official
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 96 PM2.5 samples in the candidate CBSA on 2023-06-27, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
U.S. EPA Air Quality System and the submitting air monitoring agency · Jun 26, 2023 official
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 448 PM2.5 samples in the candidate CBSA on 2023-06-26, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
U.S. EPA Air Quality System and the submitting air monitoring agency · Jun 27, 2023 official
EPA AQS carries an agency-submitted request-exclusion qualifier (RF, Fire - Canadian.) on 96 PM2.5 samples in the candidate CBSA on 2023-06-27, identifying wildfire smoke as affecting the samples. A request-exclusion qualifier is an official submitting-agency causal claim, but this endpoint does not establish EPA concurrence.
See every retained source and limitation ↓
Sequence: Milwaukee (Jun 26) → Madison (Jun 26) → Cleveland (Jun 27) → Indianapolis (Jun 27) → Chicago (Jun 27) → Grand Rapids (Jun 27) → Detroit (Jun 27) → Columbus (Jun 27) → Dayton (Jun 27) → Cincinnati (Jun 27) → +32 more metros
Evidence path
A cause is more convincing when the record connects three things: something happened, the air mass moved toward the region, and local instruments responded. Here is how much of that chain is documented for this event.
Source or mechanism
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 96 PM2.5 samples in the candidate CBSA on 2023-06-27, identifying wildfire smoke as affecting the samples. An informational qualifier is an official…
View supporting source ↗Air-mass movement
Ohio EPA’s regulatory technical support documents wildfire complexes in Quebec and Ontario, smoke imagery, and transport analyses for the June 27–30 PM2.5 episode in Ohio.
View transport source ↗Local response
EPA monitors recorded the event across 42 metros. The peak daily concentration is roughly 9.5 cigarette-equivalents at the outdoor daily rate.
Inspect the pollutant and weather signals ↓Event autopsy
Before, during, and after the episode: nearby pollutant monitors and surface-weather stations show what changed. This context tests the “Wildfire smoke” explanation; it does not assign the cause by itself.
Cleveland-Elyria, OH
Monitor comparison window 2023-06-24 to 2023-07-02 · PM2.5 target: Chippewa
499% above nearby days
About the same as surrounding days
169% higher than surrounding days
499% higher than surrounding days
169% higher than surrounding days
213% higher than surrounding days
49% higher than surrounding days
16% lower than surrounding days
About the same as surrounding days
8% lower than surrounding days
About the same as surrounding days
9% lower than surrounding days
About the same as surrounding days
Detroit-Warren-Dearborn, MI
Monitor comparison window 2023-06-24 to 2023-07-02 · PM2.5 target: NMH48217 NEW MT HERMAN CHURCH
418% above nearby days
23% higher than surrounding days
374% higher than surrounding days
418% higher than surrounding days
374% higher than surrounding days
111% higher than surrounding days
14% higher than surrounding days
56% higher than surrounding days
About the same as surrounding days
8% lower than surrounding days
About the same as surrounding days
6% lower than surrounding days
23% higher than surrounding days
Akron, OH
Monitor comparison window 2023-06-24 to 2023-07-02 · PM2.5 target: East HS
538% above nearby days
482% higher than surrounding days
538% higher than surrounding days
482% higher than surrounding days
189% higher than surrounding days
About the same as surrounding days
7% lower than surrounding days
Madison, WI
Monitor comparison window 2023-06-23 to 2023-07-02 · PM2.5 target: MADISON - UNIVERSITY AVE WELL #6
294% above nearby days
59% higher than surrounding days
333% higher than surrounding days
294% higher than surrounding days
333% higher than surrounding days
9% higher than surrounding days
5% lower than surrounding days
59% higher than surrounding days
Milwaukee-Waukesha-West Allis, WI
Monitor comparison window 2023-06-23 to 2023-07-02 · PM2.5 target: WAUKESHA - CLEVELAND AVE
231% above nearby days
About the same as surrounding days
196% higher than surrounding days
231% higher than surrounding days
196% higher than surrounding days
46% higher than surrounding days
14% higher than surrounding days
36% higher than surrounding days
6% lower than surrounding days
About the same as surrounding days
7% lower than surrounding days
About the same as surrounding days
Chicago-Naperville-Elgin, IL-IN-WI
Monitor comparison window 2023-06-23 to 2023-07-02 · PM2.5 target: PERSHING SCHOOL
222% above nearby days
22% higher than surrounding days
91% higher than surrounding days
222% higher than surrounding days
91% higher than surrounding days
112% higher than surrounding days
24% higher than surrounding days
About the same as surrounding days
10% lower than surrounding days
About the same as surrounding days
About the same as surrounding days
About the same as surrounding days
22% higher than surrounding days
Cincinnati, OH-KY-IN
Monitor comparison window 2023-06-24 to 2023-07-02 · PM2.5 target: Yankee
347% above nearby days
11% higher than surrounding days
235% higher than surrounding days
347% higher than surrounding days
235% higher than surrounding days
171% higher than surrounding days
36% higher than surrounding days
11% higher than surrounding days
About the same as surrounding days
About the same as surrounding days
About the same as surrounding days
About the same as surrounding days
11% higher than surrounding days
Columbus, OH
Monitor comparison window 2023-06-24 to 2023-07-02 · PM2.5 target: Smoky Row Near Road
797% above nearby days
No adjacent-day comparison
797% higher than surrounding days
No adjacent-day comparison
493% higher than surrounding days
About the same as surrounding days
Adjacent observations available
31% higher than surrounding days
6% lower than surrounding days
Dayton, OH
Monitor comparison window 2023-06-24 to 2023-07-02 · PM2.5 target: Preble NCore
685% above nearby days
9% higher than surrounding days
534% higher than surrounding days
685% higher than surrounding days
534% higher than surrounding days
362% higher than surrounding days
About the same as surrounding days
12% higher than surrounding days
About the same as surrounding days
About the same as surrounding days
About the same as surrounding days
9% higher than surrounding days
Indianapolis-Carmel-Anderson, IN
Monitor comparison window 2023-06-24 to 2023-07-02 · PM2.5 target: Indpls- W. 18th St./ Ernie Pyle School 90
536% above nearby days
5% lower than surrounding days
374% higher than surrounding days
536% higher than surrounding days
374% higher than surrounding days
261% higher than surrounding days
44% higher than surrounding days
About the same as surrounding days
About the same as surrounding days
6% lower than surrounding days
About the same as surrounding days
About the same as surrounding days
5% lower than surrounding days
Toledo, OH
Monitor comparison window 2023-06-24 to 2023-07-02 · PM2.5 target: Erie
944% above nearby days
7% higher than surrounding days
944% higher than surrounding days
Adjacent observations available
31% higher than surrounding days
7% higher than surrounding days
Harrisburg-Carlisle, PA
Monitor comparison window 2023-06-25 to 2023-07-03 · PM2.5 target: Harrisburg
592% above nearby days
144% higher than surrounding days
592% higher than surrounding days
144% higher than surrounding days
44% higher than surrounding days
About the same as surrounding days
Pittsburgh, PA
Monitor comparison window 2023-06-25 to 2023-07-03 · PM2.5 target: Parkway East Near-Road
817% above nearby days
About the same as surrounding days
474% higher than surrounding days
817% higher than surrounding days
474% higher than surrounding days
121% higher than surrounding days
18% higher than surrounding days
About the same as surrounding days
8% higher than surrounding days
About the same as surrounding days
About the same as surrounding days
About the same as surrounding days
About the same as surrounding days
Grand Rapids-Wyoming, MI
Monitor comparison window 2023-06-24 to 2023-07-02 · PM2.5 target: Jenison
292% above nearby days
32% higher than surrounding days
277% higher than surrounding days
292% higher than surrounding days
277% higher than surrounding days
67% higher than surrounding days
About the same as surrounding days
25% higher than surrounding days
33% higher than surrounding days
15% lower than surrounding days
About the same as surrounding days
About the same as surrounding days
32% higher than surrounding days
Louisville/Jefferson County, KY-IN
Monitor comparison window 2023-06-25 to 2023-07-01 · PM2.5 target: Jeffersonville- Bates-Bowyer Ave.
420% above nearby days
65% lower than surrounding days
300% higher than surrounding days
420% higher than surrounding days
300% higher than surrounding days
138% higher than surrounding days
45% higher than surrounding days
14% higher than surrounding days
25% higher than surrounding days
12% lower than surrounding days
About the same as surrounding days
About the same as surrounding days
65% lower than surrounding days
Baltimore-Columbia-Towson, MD
Monitor comparison window 2023-06-26 to 2023-07-03 · PM2.5 target: Essex
229% above nearby days
11% lower than surrounding days
No adjacent-day comparison
229% higher than surrounding days
No adjacent-day comparison
59% higher than surrounding days
40% higher than surrounding days
49% higher than surrounding days
19% higher than surrounding days
10% lower than surrounding days
About the same as surrounding days
About the same as surrounding days
11% lower than surrounding days
Richmond, VA
Monitor comparison window 2023-06-26 to 2023-07-03 · PM2.5 target: MathScience Innovation Center
172% above nearby days
47% lower than surrounding days
139% higher than surrounding days
172% higher than surrounding days
139% higher than surrounding days
82% higher than surrounding days
10% higher than surrounding days
11% higher than surrounding days
29% higher than surrounding days
About the same as surrounding days
About the same as surrounding days
About the same as surrounding days
47% lower than surrounding days
Virginia Beach-Norfolk-Newport News, VA-NC
Monitor comparison window 2023-06-26 to 2023-07-03 · PM2.5 target: NASA Langley Research Center
90% above nearby days
74% higher than surrounding days
90% higher than surrounding days
74% higher than surrounding days
80% higher than surrounding days
15% higher than surrounding days
About the same as surrounding days
41% higher than surrounding days
About the same as surrounding days
Washington-Arlington-Alexandria, DC-VA-MD-WV
Monitor comparison window 2023-06-26 to 2023-07-03 · PM2.5 target: Lee District Park
195% above nearby days
15% lower than surrounding days
189% higher than surrounding days
195% higher than surrounding days
189% higher than surrounding days
91% higher than surrounding days
20% higher than surrounding days
638% higher than surrounding days
19% higher than surrounding days
About the same as surrounding days
About the same as surrounding days
About the same as surrounding days
15% lower than surrounding days
Allentown-Bethlehem-Easton, PA-NJ
Monitor comparison window 2023-06-26 to 2023-07-04 · PM2.5 target: Freemansburg
439% above nearby days
439% higher than surrounding days
34% higher than surrounding days
18% higher than surrounding days
39% higher than surrounding days
About the same as surrounding days
New York-Newark-Jersey City, NY-NJ-PA
Monitor comparison window 2023-06-26 to 2023-07-04 · PM2.5 target: NEWBURGH
69% above nearby days
About the same as surrounding days
No adjacent-day comparison
69% higher than surrounding days
No adjacent-day comparison
95% higher than surrounding days
19% lower than surrounding days
About the same as surrounding days
42% higher than surrounding days
About the same as surrounding days
About the same as surrounding days
Philadelphia-Camden-Wilmington, PA-NJ-DE-MD
Monitor comparison window 2023-06-26 to 2023-07-04 · PM2.5 target: New Garden
205% above nearby days
About the same as surrounding days
188% higher than surrounding days
205% higher than surrounding days
188% higher than surrounding days
85% higher than surrounding days
About the same as surrounding days
17% higher than surrounding days
23% higher than surrounding days
11% lower than surrounding days
About the same as surrounding days
About the same as surrounding days
About the same as surrounding days
Scranton--Wilkes-Barre--Hazleton, PA
Monitor comparison window 2023-06-26 to 2023-07-04 · PM2.5 target: Scranton
442% above nearby days
204% higher than surrounding days
442% higher than surrounding days
204% higher than surrounding days
124% higher than surrounding days
47% higher than surrounding days
40% higher than surrounding days
54% higher than surrounding days
About the same as surrounding days
Bridgeport-Stamford-Norwalk, CT
Monitor comparison window 2023-06-26 to 2023-07-04 · PM2.5 target: Roosevelt School-Bridgeport
299% above nearby days
7% lower than surrounding days
158% higher than surrounding days
299% higher than surrounding days
158% higher than surrounding days
12% higher than surrounding days
22% higher than surrounding days
29% higher than surrounding days
About the same as surrounding days
About the same as surrounding days
7% lower than surrounding days
New Haven-Milford, CT
Monitor comparison window 2023-06-26 to 2023-07-04 · PM2.5 target: Criscuolo Park-New Haven
194% above nearby days
9% lower than surrounding days
25% higher than surrounding days
194% higher than surrounding days
25% higher than surrounding days
236% higher than surrounding days
67% higher than surrounding days
186% higher than surrounding days
34% higher than surrounding days
About the same as surrounding days
About the same as surrounding days
About the same as surrounding days
9% lower than surrounding days
Rochester, NY
Monitor comparison window 2023-06-25 to 2023-07-03 · PM2.5 target: ROCHESTER 2
472% above nearby days
9% lower than surrounding days
No adjacent-day comparison
472% higher than surrounding days
No adjacent-day comparison
130% higher than surrounding days
40% higher than surrounding days
68% higher than surrounding days
8% higher than surrounding days
9% lower than surrounding days
About the same as surrounding days
6% lower than surrounding days
9% lower than surrounding days
Buffalo-Cheektowaga-Niagara Falls, NY
Monitor comparison window 2023-06-25 to 2023-07-03 · PM2.5 target: BUFFALO
181% above nearby days
No adjacent-day comparison
181% higher than surrounding days
No adjacent-day comparison
88% higher than surrounding days
57% higher than surrounding days
352% higher than surrounding days
27% higher than surrounding days
Syracuse, NY
Monitor comparison window 2023-06-25 to 2023-07-03 · PM2.5 target: EAST SYRACUSE
316% above nearby days
About the same as surrounding days
316% higher than surrounding days
8% lower than surrounding days
7% lower than surrounding days
About the same as surrounding days
St. Louis, MO-IL
Monitor comparison window 2023-06-24 to 2023-07-01 · PM2.5 target: Blair Street
311% above nearby days
14% lower than surrounding days
142% higher than surrounding days
311% higher than surrounding days
142% higher than surrounding days
90% higher than surrounding days
23% higher than surrounding days
25% higher than surrounding days
23% higher than surrounding days
About the same as surrounding days
About the same as surrounding days
About the same as surrounding days
14% lower than surrounding days
Minneapolis-St. Paul-Bloomington, MN-WI
Monitor comparison window 2023-06-25 to 2023-07-01 · PM2.5 target: Apple Valley
168% above nearby days
100% higher than surrounding days
127% higher than surrounding days
168% higher than surrounding days
127% higher than surrounding days
52% higher than surrounding days
30% higher than surrounding days
16% higher than surrounding days
31% higher than surrounding days
About the same as surrounding days
100% higher than surrounding days
Charlotte-Concord-Gastonia, NC-SC
Monitor comparison window 2023-06-26 to 2023-07-03 · PM2.5 target: Rockwell
92% above nearby days
6% lower than surrounding days
90% higher than surrounding days
92% higher than surrounding days
90% higher than surrounding days
65% higher than surrounding days
20% higher than surrounding days
81% higher than surrounding days
9% higher than surrounding days
About the same as surrounding days
About the same as surrounding days
About the same as surrounding days
6% lower than surrounding days
Durham-Chapel Hill, NC
Monitor comparison window 2023-06-26 to 2023-07-03 · PM2.5 target: Durham Armory
154% above nearby days
117% higher than surrounding days
154% higher than surrounding days
117% higher than surrounding days
14% higher than surrounding days
13% higher than surrounding days
About the same as surrounding days
Greensboro-High Point, NC
Monitor comparison window 2023-06-26 to 2023-07-03 · PM2.5 target: Mendenhall School
122% above nearby days
140% higher than surrounding days
122% higher than surrounding days
140% higher than surrounding days
4209% higher than surrounding days
11% higher than surrounding days
Raleigh, NC
Monitor comparison window 2023-06-26 to 2023-07-03 · PM2.5 target: Millbrook School
114% above nearby days
21% lower than surrounding days
105% higher than surrounding days
114% higher than surrounding days
105% higher than surrounding days
64% higher than surrounding days
33% higher than surrounding days
373% higher than surrounding days
5% higher than surrounding days
About the same as surrounding days
About the same as surrounding days
About the same as surrounding days
21% lower than surrounding days
Winston-Salem, NC
Monitor comparison window 2023-06-26 to 2023-07-03 · PM2.5 target: Hattie Avenue
174% above nearby days
174% higher than surrounding days
174% higher than surrounding days
174% higher than surrounding days
18% higher than surrounding days
25% lower than surrounding days
12% higher than surrounding days
About the same as surrounding days
About the same as surrounding days
About the same as surrounding days
Albany-Schenectady-Troy, NY
Monitor comparison window 2023-06-27 to 2023-07-04 · PM2.5 target: ALBANY COUNTY HEALTH DEPT
196% above nearby days
196% higher than surrounding days
139% higher than surrounding days
About the same as surrounding days
Hartford-West Hartford-East Hartford, CT
Monitor comparison window 2023-06-27 to 2023-07-04 · PM2.5 target: Huntley Place-Hartford
251% above nearby days
8% higher than surrounding days
199% higher than surrounding days
251% higher than surrounding days
199% higher than surrounding days
67% higher than surrounding days
38% higher than surrounding days
59% higher than surrounding days
6% lower than surrounding days
About the same as surrounding days
About the same as surrounding days
8% higher than surrounding days
Providence-Warwick, RI-MA
Monitor comparison window 2023-06-27 to 2023-07-04 · PM2.5 target: Vernon St, Pawtucket
281% above nearby days
22% lower than surrounding days
75% higher than surrounding days
281% higher than surrounding days
75% higher than surrounding days
53% higher than surrounding days
16% higher than surrounding days
27% higher than surrounding days
10% lower than surrounding days
About the same as surrounding days
About the same as surrounding days
22% lower than surrounding days
Springfield, MA
Monitor comparison window 2023-06-27 to 2023-07-04 · PM2.5 target: QUABBIN RES
353% above nearby days
241% higher than surrounding days
353% higher than surrounding days
241% higher than surrounding days
61% higher than surrounding days
19% higher than surrounding days
85% higher than surrounding days
12% lower than surrounding days
About the same as surrounding days
About the same as surrounding days
Worcester, MA-CT
Monitor comparison window 2023-06-27 to 2023-07-04 · PM2.5 target: WORCESTER SUMMER STREET
323% above nearby days
205% higher than surrounding days
323% higher than surrounding days
205% higher than surrounding days
39% higher than surrounding days
17% higher than surrounding days
About the same as surrounding days
64% higher than surrounding days
12% lower than surrounding days
About the same as surrounding days
About the same as surrounding days
Chattanooga, TN-GA
Monitor comparison window 2023-06-26 to 2023-07-02 · PM2.5 target: Siskin
188% above nearby days
188% higher than surrounding days
About the same as surrounding days
About the same as surrounding days
Knoxville, TN
Monitor comparison window 2023-06-26 to 2023-07-02 · PM2.5 target: Spring Hill Elementary School
159% above nearby days
About the same as surrounding days
134% higher than surrounding days
159% higher than surrounding days
134% higher than surrounding days
97% higher than surrounding days
10% higher than surrounding days
22% higher than surrounding days
24% higher than surrounding days
About the same as surrounding days
About the same as surrounding days
About the same as surrounding days
Source: U.S. EPA AirData daily observations and, where available, nearby ASOS/AWOS surface observations. Values are descriptive medians over the retained monitor set; missing measurements remain missing. Transport and source evidence remain separate layers because this instrument pattern does not assign a cause by itself.
Episode peak
-- cigarettes
The smoke map's scale, replayed over this event: the surface interpolates between covered metros' daily records, framed to the affected region. Hover for a reading, click a metro to pin it to the card. Days a monitor did not report draw nothing.
Views from the selected metro
Select a metro on the map to see nearby cameras. Where an operator archive reaches the event, drag the divider to compare two moments, adjust either date and time, or play the available event-day frames. Camera imagery is visual context, not an air-quality measurement or proof of smoke.
No useful public camera views are currently available within 80 km of this metro.
| Metro | Peak PM2.5 | Cigarettes, whole event | Peak day | All-time standing |
|---|---|---|---|---|
| Cleveland-Elyria, OH | 210.1 µg/m³ | 16.8 | Jun 28, 2023 | #3 of its top days |
| Milwaukee-Waukesha-West Allis, WI | 195.4 µg/m³ | 22.3 | Jun 27, 2023 | #2 of its top days |
| Madison, WI | 192.7 µg/m³ | 22.8 | Jun 28, 2023 | Worst day on record |
| Indianapolis-Carmel-Anderson, IN | 183.7 µg/m³ | 19.8 | Jun 28, 2023 | Worst day on record |
| Chicago-Naperville-Elgin, IL-IN-WI | 170.6 µg/m³ | 18.6 | Jun 28, 2023 | #2 of its top days |
| Pittsburgh, PA | 161.4 µg/m³ | 14.6 | Jun 29, 2023 | #2 of its top days |
| Akron, OH | 154.4 µg/m³ | 11.0 | Jun 28, 2023 | #2 of its top days |
| Grand Rapids-Wyoming, MI | 151.7 µg/m³ | 16.3 | Jun 27, 2023 | #3 of its top days |
| Detroit-Warren-Dearborn, MI | 150.4 µg/m³ | 17.2 | Jun 28, 2023 | #3 of its top days |
| Columbus, OH | 134.9 µg/m³ | 13.9 | Jun 28, 2023 | #3 of its top days |
| Dayton, OH | 128.6 µg/m³ | 12.9 | Jun 28, 2023 | Worst day on record |
| Cincinnati, OH-KY-IN | 121.1 µg/m³ | 11.5 | Jun 28, 2023 | Worst day on record |
| Louisville/Jefferson County, KY-IN | 100.4 µg/m³ | 4.6 | Jun 28, 2023 | #2 of its top days |
| Toledo, OH | 99.2 µg/m³ | 4.5 | Jun 29, 2023 | #3 of its top days |
| Harrisburg-Carlisle, PA | 97.2 µg/m³ | 10.2 | Jun 29, 2023 | #5 of its top days |
| Baltimore-Columbia-Towson, MD | 97.1 µg/m³ | 4.4 | Jun 29, 2023 | #3 of its top days |
| Washington-Arlington-Alexandria, DC-VA-MD-WV | 93.1 µg/m³ | 4.2 | Jun 29, 2023 | #4 of its top days |
| Scranton--Wilkes-Barre--Hazleton, PA | 92 µg/m³ | 10.7 | Jun 30, 2023 | #3 of its top days |
| Rochester, NY | 91.4 µg/m³ | 13.4 | Jun 30, 2023 | #2 of its top days |
| Philadelphia-Camden-Wilmington, PA-NJ-DE-MD | 90.5 µg/m³ | 7.1 | Jun 29, 2023 | #7 of its top days |
| Syracuse, NY | 87.9 µg/m³ | 7.6 | Jun 29, 2023 | #3 of its top days |
| Allentown-Bethlehem-Easton, PA-NJ | 79.9 µg/m³ | 7.1 | Jun 29, 2023 | #6 of its top days |
| St. Louis, MO-IL | 78.3 µg/m³ | 6.0 | Jun 28, 2023 | #2 of its top days |
| Minneapolis-St. Paul-Bloomington, MN-WI | 67.2 µg/m³ | 3.1 | Jun 28, 2023 | #13 of its top days |
| New York-Newark-Jersey City, NY-NJ-PA | 66.7 µg/m³ | 5.6 | Jun 30, 2023 | #7 of its top days |
| Richmond, VA | 66.3 µg/m³ | 4.8 | Jun 29, 2023 | #2 of its top days |
| Bridgeport-Stamford-Norwalk, CT | 60.2 µg/m³ | 4.9 | Jun 30, 2023 | #6 of its top days |
| Winston-Salem, NC | 60.2 µg/m³ | 2.7 | Jun 29, 2023 | #3 of its top days |
| Albany-Schenectady-Troy, NY | 54.8 µg/m³ | 4.9 | Jun 30, 2023 | #5 of its top days |
| New Haven-Milford, CT | 54.5 µg/m³ | 4.8 | Jun 30, 2023 | #9 of its top days |
| Worcester, MA-CT | 53.3 µg/m³ | 2.4 | Jul 1, 2023 | #4 of its top days |
| Knoxville, TN | 51.3 µg/m³ | 2.3 | Jun 29, 2023 | #22 of its top days |
| Springfield, MA | 50.6 µg/m³ | 2.3 | Jul 1, 2023 | #14 of its top days |
| Greensboro-High Point, NC | 47.7 µg/m³ | 2.2 | Jun 29, 2023 | #6 of its top days |
| Raleigh, NC | 47.4 µg/m³ | 3.9 | Jun 29, 2023 | #6 of its top days |
| Hartford-West Hartford-East Hartford, CT | 46.8 µg/m³ | 4.2 | Jun 30, 2023 | #12 of its top days |
| Virginia Beach-Norfolk-Newport News, VA-NC | 46.7 µg/m³ | 2.1 | Jun 29, 2023 | #16 of its top days |
| Chattanooga, TN-GA | 46.5 µg/m³ | 2.1 | Jun 29, 2023 | #16 of its top days |
| Providence-Warwick, RI-MA | 45.1 µg/m³ | 2.1 | Jul 1, 2023 | #11 of its top days |
| Charlotte-Concord-Gastonia, NC-SC | 44 µg/m³ | 2.0 | Jun 29, 2023 | #13 of its top days |
| Durham-Chapel Hill, NC | 43.8 µg/m³ | 3.7 | Jun 29, 2023 | #4 of its top days |
| Buffalo-Cheektowaga-Niagara Falls, NY | 40.9 µg/m³ | 1.9 | Jun 29, 2023 | #23 of its top days |
"Cigarettes, whole event" totals a metro's ranked event days at 22 µg/m³ per cigarette: what a person outdoors there breathed across the event, as the illustration. "All-time standing" is where this episode's days sit in each metro's ranked record (worst-area measure, since 1999). Full local context is on each metro's Air Records page.
Public evidence library
Each card states what a source supports—and what it does not. Official records, research, reporting, community observations, and transparent inferences remain visibly different kinds of evidence.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 96 PM2.5 samples in the candidate CBSA on 2023-06-27, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 448 PM2.5 samples in the candidate CBSA on 2023-06-26, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier RF — Fire - Canadian.
EPA AQS carries an agency-submitted request-exclusion qualifier (RF, Fire - Canadian.) on 96 PM2.5 samples in the candidate CBSA on 2023-06-27, identifying wildfire smoke as affecting the samples. A request-exclusion qualifier is an official submitting-agency causal claim, but this endpoint does not establish EPA concurrence.
AQS PM2.5 qualifier RF — Fire - Canadian.
EPA AQS carries an agency-submitted request-exclusion qualifier (RF, Fire - Canadian.) on 146 PM2.5 samples in the candidate CBSA on 2023-06-26, identifying wildfire smoke as affecting the samples. A request-exclusion qualifier is an official submitting-agency causal claim, but this endpoint does not establish EPA concurrence.
AQS PM2.5 qualifier RF — Fire - Canadian.
EPA AQS carries an agency-submitted request-exclusion qualifier (RF, Fire - Canadian.) on 96 PM2.5 samples in the candidate CBSA on 2023-06-28, identifying wildfire smoke as affecting the samples. A request-exclusion qualifier is an official submitting-agency causal claim, but this endpoint does not establish EPA concurrence.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 82 PM2.5 samples in the candidate CBSA on 2023-06-26, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier RF — Fire - Canadian.
EPA AQS carries an agency-submitted request-exclusion qualifier (RF, Fire - Canadian.) on 144 PM2.5 samples in the candidate CBSA on 2023-06-27, identifying wildfire smoke as affecting the samples. A request-exclusion qualifier is an official submitting-agency causal claim, but this endpoint does not establish EPA concurrence.
AQS PM2.5 qualifier RF — Fire - Canadian.
EPA AQS carries an agency-submitted request-exclusion qualifier (RF, Fire - Canadian.) on 147 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. A request-exclusion qualifier is an official submitting-agency causal claim, but this endpoint does not establish EPA concurrence.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 96 PM2.5 samples in the candidate CBSA on 2023-06-27, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 96 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier RF — Fire - Canadian.
EPA AQS carries an agency-submitted request-exclusion qualifier (RF, Fire - Canadian.) on 98 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. A request-exclusion qualifier is an official submitting-agency causal claim, but this endpoint does not establish EPA concurrence.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 96 PM2.5 samples in the candidate CBSA on 2023-06-28, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 454 PM2.5 samples in the candidate CBSA on 2023-06-27, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 83 PM2.5 samples in the candidate CBSA on 2023-06-26, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 97 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 96 PM2.5 samples in the candidate CBSA on 2023-06-28, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 459 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier RF — Fire - Canadian.
EPA AQS carries an agency-submitted request-exclusion qualifier (RF, Fire - Canadian.) on 97 PM2.5 samples in the candidate CBSA on 2023-06-26, identifying wildfire smoke as affecting the samples. A request-exclusion qualifier is an official submitting-agency causal claim, but this endpoint does not establish EPA concurrence.
AQS PM2.5 qualifier RF — Fire - Canadian.
EPA AQS carries an agency-submitted request-exclusion qualifier (RF, Fire - Canadian.) on 144 PM2.5 samples in the candidate CBSA on 2023-06-28, identifying wildfire smoke as affecting the samples. A request-exclusion qualifier is an official submitting-agency causal claim, but this endpoint does not establish EPA concurrence.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 458 PM2.5 samples in the candidate CBSA on 2023-06-28, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 200 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 24 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 24 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 515 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 23 PM2.5 samples in the candidate CBSA on 2023-06-28, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier RF — Fire - Canadian.
EPA AQS carries an agency-submitted request-exclusion qualifier (RF, Fire - Canadian.) on 3 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. A request-exclusion qualifier is an official submitting-agency causal claim, but this endpoint does not establish EPA concurrence.
AQS PM2.5 qualifier RF — Fire - Canadian.
EPA AQS carries an agency-submitted request-exclusion qualifier (RF, Fire - Canadian.) on 48 PM2.5 samples in the candidate CBSA on 2023-06-27, identifying wildfire smoke as affecting the samples. A request-exclusion qualifier is an official submitting-agency causal claim, but this endpoint does not establish EPA concurrence.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 24 PM2.5 samples in the candidate CBSA on 2023-06-27, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier RF — Fire - Canadian.
EPA AQS carries an agency-submitted request-exclusion qualifier (RF, Fire - Canadian.) on 52 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. A request-exclusion qualifier is an official submitting-agency causal claim, but this endpoint does not establish EPA concurrence.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 196 PM2.5 samples in the candidate CBSA on 2023-06-27, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 24 PM2.5 samples in the candidate CBSA on 2023-06-28, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 500 PM2.5 samples in the candidate CBSA on 2023-06-27, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 214 PM2.5 samples in the candidate CBSA on 2023-06-28, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 497 PM2.5 samples in the candidate CBSA on 2023-06-28, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 23 PM2.5 samples in the candidate CBSA on 2023-06-27, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier RF — Fire - Canadian.
EPA AQS carries an agency-submitted request-exclusion qualifier (RF, Fire - Canadian.) on 48 PM2.5 samples in the candidate CBSA on 2023-06-28, identifying wildfire smoke as affecting the samples. A request-exclusion qualifier is an official submitting-agency causal claim, but this endpoint does not establish EPA concurrence.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 168 PM2.5 samples in the candidate CBSA on 2023-06-28, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 168 PM2.5 samples in the candidate CBSA on 2023-06-27, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier RF — Fire - Canadian.
EPA AQS carries an agency-submitted request-exclusion qualifier (RF, Fire - Canadian.) on 144 PM2.5 samples in the candidate CBSA on 2023-06-28, identifying wildfire smoke as affecting the samples. A request-exclusion qualifier is an official submitting-agency causal claim, but this endpoint does not establish EPA concurrence.
AQS PM2.5 qualifier RF — Fire - Canadian.
EPA AQS carries an agency-submitted request-exclusion qualifier (RF, Fire - Canadian.) on 132 PM2.5 samples in the candidate CBSA on 2023-06-27, identifying wildfire smoke as affecting the samples. A request-exclusion qualifier is an official submitting-agency causal claim, but this endpoint does not establish EPA concurrence.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 43 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 48 PM2.5 samples in the candidate CBSA on 2023-06-28, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 360 PM2.5 samples in the candidate CBSA on 2023-06-28, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 360 PM2.5 samples in the candidate CBSA on 2023-06-27, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 414 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 48 PM2.5 samples in the candidate CBSA on 2023-06-27, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier RF — Fire - Canadian.
EPA AQS carries an agency-submitted request-exclusion qualifier (RF, Fire - Canadian.) on 48 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. A request-exclusion qualifier is an official submitting-agency causal claim, but this endpoint does not establish EPA concurrence.
AQS PM2.5 qualifier RF — Fire - Canadian.
EPA AQS carries an agency-submitted request-exclusion qualifier (RF, Fire - Canadian.) on 48 PM2.5 samples in the candidate CBSA on 2023-06-27, identifying wildfire smoke as affecting the samples. A request-exclusion qualifier is an official submitting-agency causal claim, but this endpoint does not establish EPA concurrence.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 48 PM2.5 samples in the candidate CBSA on 2023-06-28, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier RF — Fire - Canadian.
EPA AQS carries an agency-submitted request-exclusion qualifier (RF, Fire - Canadian.) on 48 PM2.5 samples in the candidate CBSA on 2023-06-28, identifying wildfire smoke as affecting the samples. A request-exclusion qualifier is an official submitting-agency causal claim, but this endpoint does not establish EPA concurrence.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 48 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 48 PM2.5 samples in the candidate CBSA on 2023-06-27, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 456 PM2.5 samples in the candidate CBSA on 2023-06-30, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 97 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 97 PM2.5 samples in the candidate CBSA on 2023-06-30, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier RF — Fire - Canadian.
EPA AQS carries an agency-submitted request-exclusion qualifier (RF, Fire - Canadian.) on 46 PM2.5 samples in the candidate CBSA on 2023-06-30, identifying wildfire smoke as affecting the samples. A request-exclusion qualifier is an official submitting-agency causal claim, but this endpoint does not establish EPA concurrence.
AQS PM2.5 qualifier RF — Fire - Canadian.
EPA AQS carries an agency-submitted request-exclusion qualifier (RF, Fire - Canadian.) on 48 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. A request-exclusion qualifier is an official submitting-agency causal claim, but this endpoint does not establish EPA concurrence.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 96 PM2.5 samples in the candidate CBSA on 2023-06-28, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier RF — Fire - Canadian.
EPA AQS carries an agency-submitted request-exclusion qualifier (RF, Fire - Canadian.) on 48 PM2.5 samples in the candidate CBSA on 2023-06-28, identifying wildfire smoke as affecting the samples. A request-exclusion qualifier is an official submitting-agency causal claim, but this endpoint does not establish EPA concurrence.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 464 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 458 PM2.5 samples in the candidate CBSA on 2023-06-28, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 49 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 48 PM2.5 samples in the candidate CBSA on 2023-06-30, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 4 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 48 PM2.5 samples in the candidate CBSA on 2023-06-30, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 50 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 48 PM2.5 samples in the candidate CBSA on 2023-06-28, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 48 PM2.5 samples in the candidate CBSA on 2023-06-28, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IT — Wildfire-U. S.
EPA AQS carries an agency-submitted informational qualifier (IT, Wildfire-U. S.) on 408 PM2.5 samples in the candidate CBSA on 2023-06-28, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier RF — Fire - Canadian.
EPA AQS carries an agency-submitted request-exclusion qualifier (RF, Fire - Canadian.) on 240 PM2.5 samples in the candidate CBSA on 2023-06-28, identifying wildfire smoke as affecting the samples. A request-exclusion qualifier is an official submitting-agency causal claim, but this endpoint does not establish EPA concurrence.
AQS PM2.5 qualifier RF — Fire - Canadian.
EPA AQS carries an agency-submitted request-exclusion qualifier (RF, Fire - Canadian.) on 142 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. A request-exclusion qualifier is an official submitting-agency causal claim, but this endpoint does not establish EPA concurrence.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 346 PM2.5 samples in the candidate CBSA on 2023-07-01, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 282 PM2.5 samples in the candidate CBSA on 2023-07-01, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier RF — Fire - Canadian.
EPA AQS carries an agency-submitted request-exclusion qualifier (RF, Fire - Canadian.) on 52 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. A request-exclusion qualifier is an official submitting-agency causal claim, but this endpoint does not establish EPA concurrence.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 578 PM2.5 samples in the candidate CBSA on 2023-06-30, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 273 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier RF — Fire - Canadian.
EPA AQS carries an agency-submitted request-exclusion qualifier (RF, Fire - Canadian.) on 25 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. A request-exclusion qualifier is an official submitting-agency causal claim, but this endpoint does not establish EPA concurrence.
AQS PM2.5 qualifier RF — Fire - Canadian.
EPA AQS carries an agency-submitted request-exclusion qualifier (RF, Fire - Canadian.) on 48 PM2.5 samples in the candidate CBSA on 2023-06-30, identifying wildfire smoke as affecting the samples. A request-exclusion qualifier is an official submitting-agency causal claim, but this endpoint does not establish EPA concurrence.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 96 PM2.5 samples in the candidate CBSA on 2023-07-01, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 96 PM2.5 samples in the candidate CBSA on 2023-06-30, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 48 PM2.5 samples in the candidate CBSA on 2023-07-01, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 48 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier RF — Fire - Canadian.
EPA AQS carries an agency-submitted request-exclusion qualifier (RF, Fire - Canadian.) on 24 PM2.5 samples in the candidate CBSA on 2023-07-01, identifying wildfire smoke as affecting the samples. A request-exclusion qualifier is an official submitting-agency causal claim, but this endpoint does not establish EPA concurrence.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 580 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier RF — Fire - Canadian.
EPA AQS carries an agency-submitted request-exclusion qualifier (RF, Fire - Canadian.) on 194 PM2.5 samples in the candidate CBSA on 2023-06-30, identifying wildfire smoke as affecting the samples. A request-exclusion qualifier is an official submitting-agency causal claim, but this endpoint does not establish EPA concurrence.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 96 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier RF — Fire - Canadian.
EPA AQS carries an agency-submitted request-exclusion qualifier (RF, Fire - Canadian.) on 24 PM2.5 samples in the candidate CBSA on 2023-06-30, identifying wildfire smoke as affecting the samples. A request-exclusion qualifier is an official submitting-agency causal claim, but this endpoint does not establish EPA concurrence.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 48 PM2.5 samples in the candidate CBSA on 2023-06-30, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 288 PM2.5 samples in the candidate CBSA on 2023-06-30, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier RF — Fire - Canadian.
EPA AQS carries an agency-submitted request-exclusion qualifier (RF, Fire - Canadian.) on 99 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. A request-exclusion qualifier is an official submitting-agency causal claim, but this endpoint does not establish EPA concurrence.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 148 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier RF — Fire - Canadian.
EPA AQS carries an agency-submitted request-exclusion qualifier (RF, Fire - Canadian.) on 122 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. A request-exclusion qualifier is an official submitting-agency causal claim, but this endpoint does not establish EPA concurrence.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 48 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier RF — Fire - Canadian.
EPA AQS carries an agency-submitted request-exclusion qualifier (RF, Fire - Canadian.) on 120 PM2.5 samples in the candidate CBSA on 2023-06-30, identifying wildfire smoke as affecting the samples. A request-exclusion qualifier is an official submitting-agency causal claim, but this endpoint does not establish EPA concurrence.
AQS PM2.5 qualifier RF — Fire - Canadian.
EPA AQS carries an agency-submitted request-exclusion qualifier (RF, Fire - Canadian.) on 96 PM2.5 samples in the candidate CBSA on 2023-06-30, identifying wildfire smoke as affecting the samples. A request-exclusion qualifier is an official submitting-agency causal claim, but this endpoint does not establish EPA concurrence.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 100 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 96 PM2.5 samples in the candidate CBSA on 2023-06-30, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier RT — Wildfire-U. S.
EPA AQS carries an agency-submitted request-exclusion qualifier (RT, Wildfire-U. S.) on 24 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. A request-exclusion qualifier is an official submitting-agency causal claim, but this endpoint does not establish EPA concurrence.
AQS PM2.5 qualifier RT — Wildfire-U. S.
EPA AQS carries an agency-submitted request-exclusion qualifier (RT, Wildfire-U. S.) on 24 PM2.5 samples in the candidate CBSA on 2023-06-30, identifying wildfire smoke as affecting the samples. A request-exclusion qualifier is an official submitting-agency causal claim, but this endpoint does not establish EPA concurrence.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 96 PM2.5 samples in the candidate CBSA on 2023-06-30, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 143 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 24 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier RT — Wildfire-U. S.
EPA AQS carries an agency-submitted request-exclusion qualifier (RT, Wildfire-U. S.) on 49 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. A request-exclusion qualifier is an official submitting-agency causal claim, but this endpoint does not establish EPA concurrence.
AQS PM2.5 qualifier RF — Fire - Canadian.
EPA AQS carries an agency-submitted request-exclusion qualifier (RF, Fire - Canadian.) on 49 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. A request-exclusion qualifier is an official submitting-agency causal claim, but this endpoint does not establish EPA concurrence.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 95 PM2.5 samples in the candidate CBSA on 2023-06-30, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier RF — Fire - Canadian.
EPA AQS carries an agency-submitted request-exclusion qualifier (RF, Fire - Canadian.) on 24 PM2.5 samples in the candidate CBSA on 2023-06-30, identifying wildfire smoke as affecting the samples. A request-exclusion qualifier is an official submitting-agency causal claim, but this endpoint does not establish EPA concurrence.
AQS PM2.5 qualifier RF — Fire - Canadian.
EPA AQS carries an agency-submitted request-exclusion qualifier (RF, Fire - Canadian.) on 25 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. A request-exclusion qualifier is an official submitting-agency causal claim, but this endpoint does not establish EPA concurrence.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 98 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 23 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 24 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier RF — Fire - Canadian.
EPA AQS carries an agency-submitted request-exclusion qualifier (RF, Fire - Canadian.) on 22 PM2.5 samples in the candidate CBSA on 2023-06-30, identifying wildfire smoke as affecting the samples. A request-exclusion qualifier is an official submitting-agency causal claim, but this endpoint does not establish EPA concurrence.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 97 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier RF — Fire - Canadian.
EPA AQS carries an agency-submitted request-exclusion qualifier (RF, Fire - Canadian.) on 25 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. A request-exclusion qualifier is an official submitting-agency causal claim, but this endpoint does not establish EPA concurrence.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 24 PM2.5 samples in the candidate CBSA on 2023-06-30, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 24 PM2.5 samples in the candidate CBSA on 2023-06-30, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 71 PM2.5 samples in the candidate CBSA on 2023-06-30, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 96 PM2.5 samples in the candidate CBSA on 2023-06-30, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 73 PM2.5 samples in the candidate CBSA on 2023-06-29, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 48 PM2.5 samples in the candidate CBSA on 2023-07-01, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 120 PM2.5 samples in the candidate CBSA on 2023-07-01, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 48 PM2.5 samples in the candidate CBSA on 2023-07-01, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 48 PM2.5 samples in the candidate CBSA on 2023-07-01, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 97 PM2.5 samples in the candidate CBSA on 2023-06-30, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
AQS PM2.5 qualifier IF — Fire - Canadian.
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 48 PM2.5 samples in the candidate CBSA on 2023-06-30, identifying wildfire smoke as affecting the samples. An informational qualifier is an official submitting-agency flag, not a request for exclusion or an EPA-concurred determination.
Archived Chicago and Northwest Indiana Air Quality Alert, June 27, 2023
The Illinois/Northwest Indiana alerts explicitly identified wildfire smoke during the Chicago-area episode; ozone-only Wisconsin alerts were not retained. IEM is the archive, not the official system of record.
Archived Indianapolis Air Quality Alert, June 27, 2023
The Indianapolis alert explicitly attributed particulates to Canadian wildfire smoke; Louisville-office Anderson matches were not retained. IEM is the archive, not the official system of record.
Archived St. Louis Air Quality Alert, June 27, 2023
The St. Louis regional alert explicitly identified wildfire smoke during the particle-pollution event. IEM is the archive, not the official system of record.
Archived Louisville Air Quality Alert, June 28, 2023
The Louisville alert explicitly identified wildfire smoke during the June 28 particle-pollution episode. IEM is the archive, not the official system of record.
Archived New York State Air Quality Alert, June 29, 2023
New York State alerts explicitly attributed elevated fine-particle levels during the event to residual Canadian wildfire smoke. IEM is the archive, not the official system of record.
Multi-Day Air Quality Advisory Issued
Wisconsin DNR issued a multi-day advisory for Madison and Milwaukee-area conditions, explicitly attributing it to another round of smoke from Canadian wildfires.
Ohio EPA’s regulatory technical support documents wildfire complexes in Quebec and Ontario, smoke imagery, and transport analyses for the June 27–30 PM2.5 episode in Ohio.
Governor Hochul Cautions New Yorkers as Air Quality Health Advisory Expanded to Include Entire State
New York’s statewide advisory states that smoke from Canadian wildfires was causing unhealthy air quality across the state.
Governor Hochul Announces Statewide Air Quality Health Advisory to Remain in Effect Through Friday
New York’s statewide advisory says air quality remained impacted by Canadian wildfires and describes smoke-driven air pollution through June 30.
Illinois IDPH reported that unsafe Illinois air quality in the preceding days was due to smoke from Canadian wildfires.
Live: One-third of US population under air quality alerts as East remains socked in by smoke
Contemporaneous reporting states that Michigan’s statewide particulate-matter advisory was for smoke from Canadian wildfires.
Wildfire Smoke Pushing Back Into The Carolinas
WCCB reported a Charlotte-area Code Orange alert extending into Thursday because of another push of wildfire smoke together with ground-level ozone.
Agency determination A government body issued a record naming this cause for this event: an NWS air-quality alert, a NOAA Storm Events record, or a state or local official archive.
This episode was grouped from the monitor record by the catalog pipeline and given its cause from the evidence listed above. It has not been individually reviewed and signed off, so its boundaries, cause, and name may change as evidence accumulates. Grouping policy common_sense_root_cause_grouping.v2. The cause label reflects the assembled evidence above, not an IAQng detection formula. If it is wrong, tell us.