2023 Ozone Exceedances
(Through May 12, 2023)
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 |
|---|---|---|---|
| Madison | May 12, 2023 | 0.075 | Peak Ozone AQI |
| Abington | April 14, 2023 | 0.074 | Peak Ozone AQI |
| Cornwall | April 14, 2023 | 0.082 | |
| Danbury | April 14, 2023 | 0.085 | |
| East Hartford | April 14, 2023 | 0.084 | |
| Greenwich | April 14, 2023 | 0.076 | |
| Groton | April 14, 2023 | 0.073 | |
| Madison | April 14, 2023 | 0.075 | |
| Middletown | April 14, 2023 | 0.082 | |
| Stafford | April 14, 2023 | 0.088 | |
| Stratford | April 14, 2023 | 0.072 | |
| Westport | April 14, 2023 | 0.078 | |
| Greenwich | April 13, 2023 | 0.072 | Peak Ozone AQI |
| Groton | April 13, 2023 | 0.076 | |
| Madison | April 13, 2023 | 0.082 | |
| Middletown | April 13, 2023 | 0.075 | |
| Stafford | April 13, 2023 | 0.071 | |
| Stratford | April 13, 2023 | 0.077 | |
| Westport | April 13, 2023 | 0.079 |
| Monitor Location | Date | Concentration (ppm) | AQI Map |
|---|---|---|---|
| None |
| Monitor Location | Date | Concentration (ppm) | AQI Map |
|---|---|---|---|
| Truro | May 12, 2023 | 0.073 | Peak Ozone AQI |
| Brockton | April 14, 2023 | 0.072 | Peak Ozone AQI |
| Chicopee | April 14, 2023 | 0.081 | |
| Chelmsford | April 14, 2023 | 0.071 | |
| East Milton | April 14, 2023 | 0.076 | |
| Fall River | April 14, 2023 | 0.076 | |
| Uxbridge | April 14, 2023 | 0.071 | |
| Ware | April 14, 2023 | 0.074 | |
| East Milton | April 13, 2023 | 0.071 | Peak Ozone AQI |
| Fairhaven | April 13, 2023 | 0.076 | |
| Fall River | April 13, 2023 | 0.080 | |
| Martha's Vineyard | April 13, 2023 | 0.073 | |
| Truro | April 13, 2023 | 0.082 |
| Monitor Location | Date | Concentration (ppm) | AQI Map |
|---|---|---|---|
| Summit | April 15, 2023 | 0.081 | Peak Ozone AQI |
| Miller State Park | April 14, 2023 | 0.074 | Peak Ozone AQI |
| Nashua | April 14, 2023 | 0.074 | |
| Summit | April 14, 2023 | 0.071 |
| Monitor Location | Date | Concentration (ppm) | AQI Map |
|---|---|---|---|
| Narragansett | May 12, 2023 | 0.072 | Peak Ozone AQI |
| East Providence | April 14, 2023 | 0.077 | Peak Ozone AQI |
| Narragansett | April 14, 2023 | 0.073 | |
| West Greenwich | April 14, 2023 | 0.078 | |
| East Providence | April 13, 2023 | 0.075 | Peak Ozone AQI |
| Narragansett | April 13, 2023 | 0.081 | |
| West Greenwich | April 13, 2023 | 0.078 |
| Monitor Location | Date | Concentration (ppm) | AQI Map |
|---|---|---|---|
| Underhill | April 13, 2023 | 0.071 | Peak Ozone AQI |