2023 PM2.5 Exceedances
(Through September 8, 2023)
Below are the exceedances of the 35 µg/m3 24-hour average PM2.5 standard and the dates they occurred for each continuous PM2.5 monitor in New England. Data from these monitors are not used for official purposes such as determining if an area meets the PM2.5 standard. All data are preliminary and subject to change.
| Monitor Location | Date | Concentration (µg/m3) |
AQI Map |
|---|---|---|---|
| Bridgeport | July 1, 2023 | 48.1 | PM 2.5 AQI |
| Cornwall | July 1, 2023 | 50.0 | |
| Danbury | July 1, 2023 | 45.1 | |
| East Hartford | July 1, 2023 | 46.4 | |
| Hartford | July 1, 2023 | 45.3 | |
| New Haven | July 1, 2023 | 39.8 | |
| Waterbury | July 1, 2023 | 51.4 | |
| Bridgeport | June 30, 2023 | 60.2 | PM 2.5 AQI |
| Cornwall | June 30, 2023 | 73.7 | |
| Danbury | June 30, 2023 | 47.9 | |
| East Hartford | June 30, 2023 | 46.1 | |
| Groton | June 30, 2023 | 38.9 | |
| Hartford | June 30, 2023 | 46.8 | |
| New Haven | June 30, 2023 | 51.4 | |
| Waterbury | June 30, 2023 | 49.7 | |
| Bridgeport | June 8, 2023 | 94.3 | PM 2.5 AQI |
| Cornwall | June 8, 2023 | 72 | |
| Danbury | June 8, 2023 | 65.6 | |
| East Hartford | June 8, 2023 | 71.4 | |
| Groton | June 8, 2023 | 77.2 | |
| Hartford | June 8, 2023 | 73.3 | |
| New Haven | June 8, 2023 | 82.2 | |
| Waterbury | June 8, 2023 | 73.2 | |
| Bridgeport | June 7, 2023 | 166.6 | PM 2.5 AQI |
| Cornwall | June 7, 2023 | 100.5 | |
| Danbury | June 7, 2023 | 130.5 | |
| East Hartford | June 7, 2023 | 74.9 | |
| Groton | June 7, 2023 | 68.3 | |
| Hartford | June 7, 2023 | 77.6 | |
| New Haven | June 7, 2023 | 128.8 | |
| Waterbury | June 7, 2023 | 97.5 | |
| Bridgeport | June 6, 2023 | 83.8 | PM 2.5 AQI |
| Cornwall | June 6, 2023 | 74.2 | |
| Danbury | June 6, 2023 | 72.1 | |
| East Hartford | June 6, 2023 | 56.6 | |
| Groton | June 6, 2023 | 59.8 | |
| Hartford | June 6, 2023 | 60.6 | |
| New Haven | June 6, 2023 | 65.8 | |
| Waterbury | June 6, 2023 | 60.1 |
| Monitor Location | Date | Concentration (µg/m3) |
AQI Map |
|---|---|---|---|
| Portland, Turkey | September 7, 2023 | 37.2 | PM 2.5 AQI |
| Madawaska PSB | September 6, 2023 | 38.6 | PM 2.5 AQI |
| Portland, Turkey | September 6, 2023 | 39 | |
| Madawaska | June 25, 2023 | 52.2 | PM 2.5 AQI |
| Presque Island | June 25, 2023 | 50.9 | |
| MICMAC | June 25, 2023 | 40.6 |
| Monitor Location | Date | Concentration (µg/m3) |
AQI Map |
|---|---|---|---|
| North Adams | July 18, 2023 | 35.2 | PM 2.5 AQI |
| Pittsfield ES | July 18, 2023 | 35.6 | |
| Greenfield | July 17, 2023 | 39.5 | PM 2.5 AQI |
| North Adams | July 17, 2023 | 38.3 | |
| Pittsfield ES | July 17, 2023 | 37.1 | |
| Boston-Von Hillern | July 2, 2023 | 35.2 | PM 2.5 AQI |
| Brockton | July 1, 2023 | 40.6 | PM 2.5 AQI |
| Chicopee | July 1, 2023 | 48 | |
| Fall River | July 1, 2023 | 42.2 | |
| Greenfield | July 1, 2023 | 59.5 | |
| North Adams | July 1, 2023 | 55.1 | |
| Pittsfield ES | July 1, 2023 | 53.7 | |
| Springfield SP | July 1, 2023 | 48.3 | |
| Ware | July 1, 2023 | 50.5 | |
| Worcester | July 1, 2023 | 53.5 | |
| Chicopee | June 30, 2023 | 39.9 | PM 2.5 AQI |
| Greenfield | June 30, 2023 | 46.2 | |
| North Adams | June 30, 2023 | 46.7 | |
| Pittsfield ES | June 30, 2023 | 47.4 | |
| Springfield SP | June 30, 2023 | 39.4 | |
| Ware | June 30, 2023 | 39.9 | |
| Chicopee | June 8, 2023 | 58.6 | PM 2.5 AQI |
| Fall River | June 8, 2023 | 48.4 | |
| North Adams | June 8, 2023 | 46.7 | |
| Pittsfield | June 8, 2023 | 73.0 | |
| Springfield | June 8, 2023 | 49 | |
| Ware | June 8, 2023 | 48 | |
| Chicopee | June 7, 2023 | 58.2 | PM 2.5 AQI |
| Fall River | June 7, 2023 | 36.5 | |
| Greenfield | June 7, 2023 | 42.1 | |
| North Adams | June 7, 2023 | 65.0 | |
| Pittsfield | June 7, 2023 | 83.2 | |
| Springfield | June 7, 2023 | 49.5 | |
| Ware | June 7, 2023 | 41.5 | |
| Brockton | June 6, 2023 | 40.9 | PM 2.5 AQI |
| Chicopee | June 6, 2023 | 51.8 | |
| Fall River | June 6, 2023 | 50.3 | |
| Greenfield | June 6, 2023 | 50.2 | |
| North Adams | June 6, 2023 | 57.3 | |
| Pittsfield | June 6, 2023 | 65.0 | |
| Springfield | June 6, 2023 | 43.0 | |
| Ware | June 6, 2023 | 46.6 | |
| Worcester | June 6, 2023 | 54.4 |
| Monitor Location | Date | Concentration (µg/m3) |
AQI Map |
|---|---|---|---|
| Laconia | July 18, 2023 | 37.3 | PM 2.5 AQI |
| Lebanon | July 18, 2023 | 35.3 | |
| Keene | July 17, 2023 | 39.9 | PM 2.5 AQI |
| Keene | July 1, 2023 | 45.3 | PM 2.5 AQI |
| Miller State Park | July 1, 2023 | 38.7 |
| Monitor Location | Date | Concentration (µg/m3) |
AQI Map |
|---|---|---|---|
| CCRI Providence | July 1, 2023 | 40.3 | PM 2.5 AQI |
| E Providence | July 1, 2023 | 41.0 | |
| Narragansett | July 1, 2023 | 38.1 | |
| Near Road | July 1, 2023 | 41.9 | |
| Vernon Street | July 1, 2023 | 44.7 | |
| Narragansett | June 8, 2023 | 49.9 | PM 2.5 AQI |
| Narragansett | June 7, 2023 | 36.6 | PM 2.5 AQI |
| West Greenwich | June 7, 2023 | 36.3 | |
| East Providence | June 6, 2023 | 35.7 | PM 2.5 AQI |
| Narragansett | June 6, 2023 | 36.2 | |
| Near Road | June 6, 2023 | 36.7 | |
| West Greenwich | June 6, 2023 | 37.3 |
| Monitor Location | Date | Concentration (µg/m3) |
AQI Map |
|---|---|---|---|
| Burlington | July 18, 2023 | 41.2 | PM 2.5 AQI |
| Rutland | July 18, 2023 | 38.6 | |
| Underhill | July 18, 2023 | 37.4 | |
| Bennington | July 17, 2023 | 38.7 | PM 2.5 AQI |
| Bennington | July 1, 2023 | 53.8 | PM 2.5 AQI |
| Burlington | July 1, 2023 | 56.4 | |
| Rutland | July 1, 2023 | 54.2 | |
| Underhill | July 1, 2023 | 51.3 | |
| Bennington | June 30, 2023 | 44.3 | PM 2.5 AQI |
| Burlington | June 26, 2023 | 49.5 | PM 2.5 AQI |
| Burlington | June 25, 2023 | 68.7 | PM 2.5 AQI |
| Underhill | June 25, 2023 | 62.5 | |
| Bennington | June 8, 2023 | 49.8 | PM 2.5 AQI |
| Bennington | June 7, 2023 | 64.3 | PM 2.5 AQI |
| Bennington | June 6, 2023 | 55.9 | PM 2.5 AQI |
| Burlington | June 6, 2023 | 35.8 |