2022 Ozone Exceedances
(Through September 6, 2022)
Below are the exceedances of the 0.070 parts per million (ppm) eight-hour average ozone standard, and the dates they occurred for each ozone monitor in New England. These data are preliminary, not quality assured and are subject to change.
| Monitor Location | Date | Concentration (ppm) | AQI Map |
|---|---|---|---|
| Cornwall | August 20, 2022 | 0.073 | Peak Ozone AQI |
| Greenwich | August 20, 2022 | 0.076 | |
| Stratford | August 20, 2022 | 0.072 | |
| Westport | August 20, 2022 | 0.076 | |
| Greenwich | August 19, 2022 | 0.072 | Peak Ozone AQI |
| Madison | August 9, 2022 | 0.077 | Peak Ozone AQI |
| Groton | August 9, 2022 | 0.073 | |
| Stratford | August 9, 2022 | 0.073 | |
| Danbury | August 6, 2022 | 0.071 | Peak Ozone AQI |
| East Hartford | August 5, 2022 | 0.075 | Peak Ozone AQI |
| Groton | August 5, 2022 | 0.071 | |
| Madison | August 5, 2022 | 0.072 | |
| Middletown | August 5, 2022 | 0.080 | |
| New Haven | August 5, 2022 | 0.080 | |
| Stratford | August 5, 2022 | 0.085 | |
| Westport | August 5, 2022 | 0.088 | |
| Cornwall | August 4, 2022 | 0.071 | Peak Ozone AQI |
| Danbury | August 4, 2022 | 0.076 | |
| East Hartford | August 4, 2022 | 0.077 | |
| Greenwich | August 4, 2022 | 0.079 | |
| Middletown | August 4, 2022 | 0.084 | |
| New Haven | August 4, 2022 | 0.077 | |
| Stafford | August 4, 2022 | 0.077 | |
| Stratford | August 4, 2022 | 0.081 | |
| Westport | August 4, 2022 | 0.081 | |
| Greenwich | August 3, 2022 | 0.074 | Peak Ozone AQI |
| Greenwich | August 2, 2022 | 0.077 | Peak Ozone AQI |
| Madison | August 2, 2022 | 0.076 | |
| Middletown | August 2, 2022 | 0.073 | |
| New Haven | August 2, 2022 | 0.071 | |
| Stratford | August 2, 2022 | 0.082 | |
| Westport | August 2, 2022 | 0.080 | |
| Danbury | July 28, 2022 | 0.075 | Peak Ozone AQI |
| Greenwich | July 28, 2022 | 0.075 | |
| Groton | July 24, 2022 | 0.073 | Peak Ozone AQI |
| Madison | July 24, 2022 | 0.077 | |
| Middletown | July 24, 2022 | 0.071 | |
| Stratford | July 24, 2022 | 0.074 | |
| Westport | July 24, 2022 | 0.073 | |
| Greenwich | July 23, 2022 | 0.073 | Peak Ozone AQI |
| Stratford | July 23, 2022 | 0.071 | |
| Westport | July 23, 2022 | 0.074 | |
| Greenwich | July 22, 2022 | 0.074 | Peak Ozone AQI |
| Stratford | July 22, 2022 | 0.076 | |
| Westport | July 22, 2022 | 0.073 | |
| Danbury | July 21, 2022 | 0.076 | Peak Ozone AQI |
| Greenwich | July 20, 2022 | 0.085 | Peak Ozone AQI |
| Groton | July 20, 2022 | 0.072 | |
| Madison | July 20, 2022 | 0.078 | |
| New Haven | July 20, 2022 | 0.072 | |
| Stratford | July 20, 2022 | 0.086 | |
| Westport | July 20, 2022 | 0.082 | |
| Greenwich | July 13, 2022 | 0.076 | Peak Ozone AQI |
| Westport | July 13, 2022 | 0.073 | |
| Danbury | July 12, 2022 | 0.072 | Peak Ozone AQI |
| Middletown | July 8, 2022 | 0.071 | Peak Ozone AQI |
| Danbury | July 1, 2022 | 0.075 | Peak Ozone AQI |
| East Hartford | July 1, 2022 | 0.081 | |
| Middletown | July 1, 2022 | 0.074 | |
| Stafford | July 1, 2022 | 0.074 | |
| Westport | July 1, 2022 | 0.073 | |
| Greenwich | June 30, 2022 | 0.073 | Peak Ozone AQI |
| Westport | June 30, 2022 | 0.071 | |
| Greenwich | June 29, 2022 | 0.071 | Peak Ozone AQI |
| Westport | June 29, 2022 | 0.071 | |
| Danbury | June 26, 2022 | 0.071 | Peak Ozone AQI |
| East Hartford | June 26, 2022 | 0.074 | |
| New Haven | June 26, 2022 | 0.072 | |
| Stratford | June 26, 2022 | 0.074 | |
| Westport | June 26, 2022 | 0.082 | |
| Westport | May 22, 2022 | 0.071 | Peak Ozone AQI |
| Cornwall | May 21, 2022 | 0.071 | Peak Ozone AQI |
| Monitor Location | Date | Concentration (ppm) | AQI Map |
|---|---|---|---|
| Cape Elizabeth | July 20, 2022 | 0.072 | Peak Ozone AQI |
| Kennebunkport | July 20, 2022 | 0.078 | |
| Bar Harbor - Cadillac Mtn | July 1, 2022 | 0.074 | Peak Ozone AQI |
| Cape Elizabeth | July 1, 2022 | 0.072 | |
| Kennebunkport | July 1, 2022 | 0.074 | |
| Portland | July 1, 2022 | 0.071 |
| Monitor Location | Date | Concentration (ppm) | AQI Map |
|---|---|---|---|
| Boston - Roxbury | August 20, 2022 | 0.071 | Peak Ozone AQI |
| Chicopee | August 20, 2022 | 0.075 | |
| Haverhill | August 20, 2022 | 0.074 | |
| Boston - Roxbury | July 24, 2022 | 0.074 | Peak Ozone AQI |
| Lynn | July 24, 2022 | 0.071 | |
| Milton - Blue Hill | July 24, 2022 | 0.071 | |
| Weymouth | July 24, 2022 | 0.073 | |
| Lynn | July 23, 2022 | 0.073 | Peak Ozone AQI |
| Martha's Vineyard | July 23, 2022 | 0.078 | |
| Fairhaven | July 20, 2022 | 0.073 | Peak Ozone AQI |
| Fall River | July 20, 2022 | 0.075 | |
| Lynn | July 20, 2022 | 0.073 |
| Monitor Location | Date | Concentration (ppm) | AQI Map |
|---|---|---|---|
| Odiorne State Park | July 20, 2022 | 0.077 | Peak Ozone AQI |
| Odiorne State Park | July 1, 2022 | 0.074 | Peak Ozone AQI |
| Portsmouth | July 1, 2022 | 0.071 |
| Monitor Location | Date | Concentration (ppm) | AQI Map |
|---|---|---|---|
| East Providence | July 24, 2022 | 0.073 | Peak Ozone AQI |
| East Matunuck | July 23, 2022 | 0.085 | Peak Ozone AQI |
| East Matunuck | July 22, 2022 | 0.075 | Peak Ozone AQI |
| East Matunuck | July 20, 2022 | 0.091 | Peak Ozone AQI |
| Narragansett | July 20, 2022 | 0.079 | |
| East Matunuck | June 25, 2022 | 0.078 | Peak Ozone AQI |
| Monitor Location | Date | Concentration (ppm) | AQI Map |
|---|---|---|---|
| None |