Wildfire smoke Agency determination
Daily PM2.5 peaked at 258.9 µg/m³ near Allentown across 25 covered metros home to 63 million people. 12 metros recorded their worst day on record; 20 placed a top-ten day.
Counting the extra PM2.5 above each metro's typical day, this event handed the average affected resident ≈ 11.3 cigarettes. Across everyone living in the affected metros, that is the collective equivalent of ≈ 710 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 9 other supplied events because the evidence identifies Canada as the shared origin and the affected intervals form one continuous 2023-06-04 through 2023-06-09 occurrence. Qualified supplied e
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 4, 2023 official
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 96 PM2.5 samples in the candidate CBSA on 2023-06-04, 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 6, 2023 official
EPA AQS carries an agency-submitted request-exclusion qualifier (RF, Fire - Canadian.) on 48 PM2.5 samples in the candidate CBSA on 2023-06-06, 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.
U.S. EPA Air Quality System and the submitting air monitoring agency · Jun 7, 2023 official
EPA AQS carries an agency-submitted informational qualifier (IF, Fire - Canadian.) on 24 PM2.5 samples in the candidate CBSA on 2023-06-07, 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.
See every retained source and limitation ↓
Sequence: Madison (Jun 4) → Allentown (Jun 6) → Philadelphia (Jun 6) → Scranton (Jun 6) → New York (Jun 6) → Syracuse (Jun 6) → Harrisburg (Jun 6) → Bridgeport (Jun 6) → New Haven (Jun 6) → Albany (Jun 6) → +15 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 2023-06-04, identifying wildfire smoke as affecting the samples. An informational qualifier is an official…
View supporting source ↗Air-mass movement
NASA satellite analysis describes smoke from Canadian wildfires transported to the Great Lakes region of Michigan and Ohio and creating localized pollution during June 1–8, 2023.
View transport source ↗Local response
EPA monitors recorded the event across 25 metros. The peak daily concentration is roughly 11.8 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.
Allentown-Bethlehem-Easton, PA-NJ
Monitor comparison window 2023-06-03 to 2023-06-11 · PM2.5 target: Freemansburg
533% above nearby days
406% higher than surrounding days
533% higher than surrounding days
406% higher than surrounding days
88% higher than surrounding days
7% lower than surrounding days
About the same as surrounding days
About the same as surrounding days
Harrisburg-Carlisle, PA
Monitor comparison window 2023-06-03 to 2023-06-11 · PM2.5 target: Harrisburg
521% above nearby days
465% higher than surrounding days
521% higher than surrounding days
465% 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 2023-06-03 to 2023-06-11 · PM2.5 target: Torresdale Station
535% above nearby days
12% higher than surrounding days
383% higher than surrounding days
535% higher than surrounding days
383% higher than surrounding days
113% higher than surrounding days
74% higher than surrounding days
24% higher than surrounding days
15% higher than surrounding days
22% lower than surrounding days
About the same as surrounding days
About the same as surrounding days
12% higher than surrounding days
Scranton--Wilkes-Barre--Hazleton, PA
Monitor comparison window 2023-06-03 to 2023-06-11 · PM2.5 target: Scranton
409% above nearby days
341% higher than surrounding days
409% higher than surrounding days
341% higher than surrounding days
109% higher than surrounding days
80% higher than surrounding days
316% higher than surrounding days
19% lower than surrounding days
9% lower than surrounding days
Baltimore-Columbia-Towson, MD
Monitor comparison window 2023-06-03 to 2023-06-11 · PM2.5 target: Edgewood
254% above nearby days
12% lower than surrounding days
76% higher than surrounding days
254% higher than surrounding days
76% higher than surrounding days
14% higher than surrounding days
30% higher than surrounding days
9% higher than surrounding days
14% lower than surrounding days
About the same as surrounding days
About the same as surrounding days
12% lower than surrounding days
Albany-Schenectady-Troy, NY
Monitor comparison window 2023-06-03 to 2023-06-11 · PM2.5 target: ALBANY COUNTY HEALTH DEPT
614% above nearby days
614% higher than surrounding days
About the same as surrounding days
About the same as surrounding days
Bridgeport-Stamford-Norwalk, CT
Monitor comparison window 2023-06-03 to 2023-06-11 · PM2.5 target: Roosevelt School-Bridgeport
695% above nearby days
About the same as surrounding days
458% higher than surrounding days
695% higher than surrounding days
458% higher than surrounding days
105% higher than surrounding days
14% higher than surrounding days
15% higher than surrounding days
About the same as surrounding days
About the same as surrounding days
About the same as surrounding days
Hartford-West Hartford-East Hartford, CT
Monitor comparison window 2023-06-03 to 2023-06-11 · PM2.5 target: Huntley Place-Hartford
360% above nearby days
About the same as surrounding days
280% higher than surrounding days
360% higher than surrounding days
280% higher than surrounding days
18% higher than surrounding days
9% higher than surrounding days
41% 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
New Haven-Milford, CT
Monitor comparison window 2023-06-03 to 2023-06-11 · PM2.5 target: Criscuolo Park-New Haven
380% above nearby days
About the same as surrounding days
138% higher than surrounding days
380% higher than surrounding days
138% higher than surrounding days
58% higher than surrounding days
27% higher than surrounding days
80% higher than surrounding days
20% 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
New York-Newark-Jersey City, NY-NJ-PA
Monitor comparison window 2023-06-03 to 2023-06-11 · PM2.5 target: QUEENS COLLEGE 2
422% above nearby days
About the same as surrounding days
112% higher than surrounding days
422% higher than surrounding days
112% higher than surrounding days
116% higher than surrounding days
48% higher than surrounding days
49% higher than surrounding days
5% higher than surrounding days
About the same as surrounding days
About the same as surrounding days
Providence-Warwick, RI-MA
Monitor comparison window 2023-06-03 to 2023-06-11 · PM2.5 target: FALL RIVER
135% above nearby days
16% higher than surrounding days
50% higher than surrounding days
135% higher than surrounding days
50% higher than surrounding days
25% higher than surrounding days
About the same as surrounding days
10% higher than surrounding days
30% higher than surrounding days
18% lower than surrounding days
About the same as surrounding days
About the same as surrounding days
16% higher than surrounding days
Springfield, MA
Monitor comparison window 2023-06-03 to 2023-06-11 · PM2.5 target: WESTOVER AFB
616% above nearby days
338% higher than surrounding days
616% higher than surrounding days
338% higher than surrounding days
64% higher than surrounding days
About the same as surrounding days
20% higher than surrounding days
About the same as surrounding days
About the same as surrounding days
About the same as surrounding days
Worcester, MA-CT
Monitor comparison window 2023-06-03 to 2023-06-11 · PM2.5 target: WORCESTER SUMMER STREET
198% above nearby days
51% higher than surrounding days
198% higher than surrounding days
51% higher than surrounding days
20% higher than surrounding days
About the same as surrounding days
About the same as surrounding days
15% higher than surrounding days
6% lower than surrounding days
About the same as surrounding days
About the same as surrounding days
Syracuse, NY
Monitor comparison window 2023-06-03 to 2023-06-11 · PM2.5 target: EAST SYRACUSE
363% above nearby days
11% higher than surrounding days
363% higher than surrounding days
About the same as surrounding days
6% lower than surrounding days
11% higher than surrounding days
Richmond, VA
Monitor comparison window 2023-06-04 to 2023-06-11 · PM2.5 target: Bryan Park
76% above nearby days
23% lower than surrounding days
97% higher than surrounding days
76% higher than surrounding days
97% higher than surrounding days
44% higher than surrounding days
10% higher than surrounding days
19% lower than surrounding days
About the same as surrounding days
14% higher than surrounding days
About the same as surrounding days
About the same as surrounding days
23% lower than surrounding days
Virginia Beach-Norfolk-Newport News, VA-NC
Monitor comparison window 2023-06-04 to 2023-06-11 · PM2.5 target: NASA Langley Research Center
105% above nearby days
98% higher than surrounding days
105% higher than surrounding days
98% higher than surrounding days
67% higher than surrounding days
21% higher than surrounding days
8% lower than surrounding days
About the same as surrounding days
About the same as surrounding days
Washington-Arlington-Alexandria, DC-VA-MD-WV
Monitor comparison window 2023-06-04 to 2023-06-11 · PM2.5 target: Lee District Park
355% above nearby days
14% lower than surrounding days
358% higher than surrounding days
355% higher than surrounding days
358% higher than surrounding days
109% higher than surrounding days
54% higher than surrounding days
152% higher than surrounding days
6% higher than surrounding days
7% lower than surrounding days
About the same as surrounding days
About the same as surrounding days
14% lower than surrounding days
Cleveland-Elyria, OH
Monitor comparison window 2023-06-04 to 2023-06-10 · PM2.5 target: St Theodosius
92% above nearby days
19% higher than surrounding days
14% higher than surrounding days
92% higher than surrounding days
14% 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
About the same as surrounding days
About the same as surrounding days
About the same as surrounding days
19% higher than surrounding days
Detroit-Warren-Dearborn, MI
Monitor comparison window 2023-06-04 to 2023-06-10 · PM2.5 target: TRINITY ST MARKS - Gordy Howe International Bridge (GHIB)
68% above nearby days
About the same as surrounding days
49% higher than surrounding days
68% higher than surrounding days
49% higher than surrounding days
About the same as surrounding days
6% higher than surrounding days
15% lower than surrounding days
About the same as surrounding days
16% lower than surrounding days
About the same as surrounding days
6% lower than surrounding days
About the same as surrounding days
Dayton, OH
Monitor comparison window 2023-06-03 to 2023-06-10 · PM2.5 target: Preble NCore
53% above nearby days
18% higher than surrounding days
60% higher than surrounding days
53% higher than surrounding days
60% higher than surrounding days
29% higher than surrounding days
About the same as surrounding days
About the same as surrounding days
16% higher than surrounding days
About the same as surrounding days
About the same as surrounding days
18% higher than surrounding days
Cincinnati, OH-KY-IN
Monitor comparison window 2023-06-03 to 2023-06-10 · PM2.5 target: BPG
70% above nearby days
About the same as surrounding days
53% higher than surrounding days
70% higher than surrounding days
53% higher than surrounding days
7% higher than surrounding days
29% higher than surrounding days
13% lower than surrounding days
About the same as surrounding days
20% higher than surrounding days
About the same as surrounding days
About the same as surrounding days
About the same as surrounding days
Columbus, OH
Monitor comparison window 2023-06-03 to 2023-06-10 · PM2.5 target: Smoky Row Near Road
42% above nearby days
69% higher than surrounding days
42% higher than surrounding days
69% higher than surrounding days
22% higher than surrounding days
Adjacent observations available
7% higher than surrounding days
About the same as surrounding days
Madison, WI
Monitor comparison window 2023-06-01 to 2023-06-07 · PM2.5 target: MADISON - UNIVERSITY AVE WELL #6
243% above nearby days
About the same as surrounding days
132% higher than surrounding days
243% higher than surrounding days
132% higher than surrounding days
5% lower than surrounding days
About the same as surrounding days
About the same as surrounding days
Raleigh, NC
Monitor comparison window 2023-06-05 to 2023-06-12 · PM2.5 target: Millbrook School
37% above nearby days
About the same as surrounding days
45% higher than surrounding days
37% higher than surrounding days
45% higher than surrounding days
About the same as surrounding days
16% higher than surrounding days
33% 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
About the same as surrounding days
Winston-Salem, NC
Monitor comparison window 2023-06-03 to 2023-06-09 · PM2.5 target: Hattie Avenue
76% above nearby days
69% higher than surrounding days
76% higher than surrounding days
69% higher than surrounding days
33% higher than surrounding days
11% higher than surrounding days
28% higher than surrounding days
About the same as surrounding days
About the same as surrounding days
7% higher than 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 |
|---|---|---|---|---|
| Allentown-Bethlehem-Easton, PA-NJ | 258.9 µg/m³ | 21.1 | Jun 7, 2023 | Worst day on record |
| Philadelphia-Camden-Wilmington, PA-NJ-DE-MD | 240.8 µg/m³ | 22.1 | Jun 7, 2023 | Worst day on record |
| Scranton--Wilkes-Barre--Hazleton, PA | 217.7 µg/m³ | 18.6 | Jun 7, 2023 | Worst day on record |
| New York-Newark-Jersey City, NY-NJ-PA | 203.5 µg/m³ | 19.0 | Jun 7, 2023 | Worst day on record |
| Syracuse, NY | 182.6 µg/m³ | 14.1 | Jun 7, 2023 | Worst day on record |
| Harrisburg-Carlisle, PA | 180 µg/m³ | 17.9 | Jun 8, 2023 | Worst day on record |
| Bridgeport-Stamford-Norwalk, CT | 166.6 µg/m³ | 15.7 | Jun 7, 2023 | Worst day on record |
| Washington-Arlington-Alexandria, DC-VA-MD-WV | 146.8 µg/m³ | 11.4 | Jun 8, 2023 | #2 of its top days |
| New Haven-Milford, CT | 132.5 µg/m³ | 13.0 | Jun 7, 2023 | Worst day on record |
| Baltimore-Columbia-Towson, MD | 125.3 µg/m³ | 9.5 | Jun 8, 2023 | Worst day on record |
| Albany-Schenectady-Troy, NY | 105.5 µg/m³ | 11.5 | Jun 7, 2023 | Worst day on record |
| Virginia Beach-Norfolk-Newport News, VA-NC | 88.4 µg/m³ | 4.0 | Jun 7, 2023 | Worst day on record |
| Hartford-West Hartford-East Hartford, CT | 77.6 µg/m³ | 9.6 | Jun 7, 2023 | Worst day on record |
| Detroit-Warren-Dearborn, MI | 66.8 µg/m³ | 3.0 | Jun 7, 2023 | #13 of its top days |
| Springfield, MA | 58.5 µg/m³ | 7.7 | Jun 8, 2023 | #5 of its top days |
| Cincinnati, OH-KY-IN | 57.7 µg/m³ | 2.6 | Jun 7, 2023 | #5 of its top days |
| Richmond, VA | 57.1 µg/m³ | 5.2 | Jun 7, 2023 | #3 of its top days |
| Dayton, OH | 54.5 µg/m³ | 4.5 | Jun 7, 2023 | #7 of its top days |
| Cleveland-Elyria, OH | 54.5 µg/m³ | 2.5 | Jun 7, 2023 | #25 of its top days |
| Worcester, MA-CT | 54.4 µg/m³ | 2.5 | Jun 6, 2023 | #3 of its top days |
| Columbus, OH | 51.4 µg/m³ | 2.3 | Jun 7, 2023 | #16 of its top days |
| Providence-Warwick, RI-MA | 50.3 µg/m³ | 4.6 | Jun 6, 2023 | #5 of its top days |
| Madison, WI | 45.7 µg/m³ | 2.1 | Jun 4, 2023 | #15 of its top days |
| Raleigh, NC | 45.2 µg/m³ | 3.8 | Jun 9, 2023 | #9 of its top days |
| Winston-Salem, NC | 41.7 µg/m³ | 1.9 | Jun 6, 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 2023-06-04, 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 2023-06-06, 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 2023-06-07, 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 431 PM2.5 samples in the candidate CBSA on 2023-06-07, 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 2023-06-07, 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 432 PM2.5 samples in the candidate CBSA on 2023-06-06, 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 2023-06-06, 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 2023-06-06, 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 32 PM2.5 samples in the candidate CBSA on 2023-06-06, 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 2023-06-07, 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 40 PM2.5 samples in the candidate CBSA on 2023-06-06, 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 310 PM2.5 samples in the candidate CBSA on 2023-06-06, 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 2023-06-07, 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 111 PM2.5 samples in the candidate CBSA on 2023-06-08, 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 2023-06-07, 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 2023-06-07, 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 2023-06-06, 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 2023-06-08, 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 307 PM2.5 samples in the candidate CBSA on 2023-06-08, 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 218 PM2.5 samples in the candidate CBSA on 2023-06-07, 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 212 PM2.5 samples in the candidate CBSA on 2023-06-06, 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 220 PM2.5 samples in the candidate CBSA on 2023-06-08, 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 304 PM2.5 samples in the candidate CBSA on 2023-06-07, 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 2023-06-08, 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 2023-06-06, 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 2023-06-08, 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 533 PM2.5 samples in the candidate CBSA on 2023-06-06, 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 2023-06-08, 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 2023-06-06, 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 2023-06-06, 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 2023-06-07, 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 2023-06-08, 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 2023-06-06, 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 97 PM2.5 samples in the candidate CBSA on 2023-06-08, 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 2023-06-07, 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 574 PM2.5 samples in the candidate CBSA on 2023-06-07, 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 2023-06-07, 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 95 PM2.5 samples in the candidate CBSA on 2023-06-07, 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 24 PM2.5 samples in the candidate CBSA on 2023-06-08, 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 2023-06-07, 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 2023-06-06, 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 51 PM2.5 samples in the candidate CBSA on 2023-06-08, 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 2023-06-08, 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 2023-06-08, 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 2023-06-07, 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 2023-06-06, 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 2023-06-06, 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 2023-06-08, 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 2023-06-07, 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 145 PM2.5 samples in the candidate CBSA on 2023-06-08, 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 2023-06-07, 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 2023-06-07, 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 142 PM2.5 samples in the candidate CBSA on 2023-06-07, 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 2023-06-08, 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 99 PM2.5 samples in the candidate CBSA on 2023-06-08, 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 144 PM2.5 samples in the candidate CBSA on 2023-06-07, 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 310 PM2.5 samples in the candidate CBSA on 2023-06-07, 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 2023-06-09, 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 2023-06-08, 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 New Jersey Air Quality Alert, June 6, 2023
The New Jersey alert explicitly attributed elevated fine-particle levels to smoke from eastern Canadian wildfires. IEM is the archive, not the official system of record.
Archived New York State Air Quality Alert, June 7, 2023
New York State alerts explicitly attributed elevated fine-particle levels to smoke transported from eastern Canadian wildfires. IEM is the archive, not the official system of record.
Wildfire Smoke Transport from Canada to US
NASA satellite analysis describes smoke from Canadian wildfires transported to the Great Lakes region of Michigan and Ohio and creating localized pollution during June 1–8, 2023.
Widespread Code Orange Air Quality Action Day Issued due to Canadian Wildfire Smoke
North Carolina DEQ issued a June 6 action day because Canadian wildfire smoke was raising fine-particle pollution across much of the state.
EPA forecast elevated fine-particle pollution from wildfires in Quebec and northern Ontario across Connecticut, Massachusetts, and Rhode Island on June 6.
CDC states that smoke from Eastern Canadian wildfires caused poor PM2.5-driven air quality across New York during June 6–8.
Pennsylvania under Code Red Air Quality Alert Due to Wildfire Smoke
Pennsylvania DEP declared a statewide fine-particle Code Red action day on June 7 because of wildfire smoke.
Air Quality Alert in Washington, DC Elevated to Code Purple
DC identified smoke from Canadian wildfires as causing unhealthy air quality in Washington and the Northeast.
Fires Lower Outdoor Air Quality in Virginia
Virginia Department of Health reported that wildfire-smoke particles from Canada were being carried by wind into much of Virginia.
'It was hazy.' People in Triangle react to air quality from Northeast Canada wildfire smoke
ABC11 reported that smoke from rapidly burning Northeast Canada wildfires reached Raleigh and the Triangle, triggering a Code Red air-quality alert and fine-particle health warnings.
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.