2023 Ozone Exceedances
(Through September 30, 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 |
---|---|---|---|
Greenwich | September 7, 2023 | 0.087 | Peak Ozone AQI |
Stratford | September 7, 2023 | 0.077 | |
Westport | September 7, 2023 | 0.076 | |
Madison | September 3, 2023 | 0.071 | Peak Ozone AQI |
Madison | August 21, 2023 | 0.074 | Peak Ozone AQI |
Stratford | August 21, 2023 | 0.074 | |
Greenwich | July 29, 2023 | 0.071 | Peak Ozone AQI |
Groton | July 29, 2023 | 0.071 | |
Madison | July 29, 2023 | 0.081 | |
Middletown | July 29, 2023 | 0.080 | |
New Haven | July 29, 2023 | 0.082 | |
Stratford | July 29, 2023 | 0.086 | |
Westport | July 29, 2023 | 0.079 | |
Greenwich | July 28, 2023 | 0.075 | Peak Ozone AQI |
Stratford | July 28, 2023 | 0.072 | |
Westport | July 28, 2023 | 0.074 | |
Greenwich | July 27, 2023 | 0.072 | Peak Ozone AQI |
Westport | July 27, 2023 | 0.074 | |
Greenwich | July 26, 2023 | 0.082 | Peak Ozone AQI |
Danbury | July 26, 2023 | 0.075 | |
Westport | July 26, 2023 | 0.075 | |
Stratford | July 19, 2023 | 0.073 | Peak Ozone AQI |
Westport | July 19, 2023 | 0.074 | |
Greenwich | July 12, 2023 | 0.089 | Peak Ozone AQI |
Groton | July 12, 2023 | 0.081 | |
Madison | July 12, 2023 | 0.081 | |
Stratford | July 12, 2023 | 0.089 | |
Westport | July 12, 2023 | 0.089 | |
Greenwich | July 11, 2023 | 0.074 | Peak Ozone AQI |
Greenwich | July 6, 2023 | 0.077 | Peak Ozone AQI |
Stratford | July 6, 2023 | 0.076 | |
Westport | July 6, 2023 | 0.071 | |
Greenwich | July 3, 2023 | 0.071 | Peak Ozone AQI |
Abington | July 1, 2023 | 0.071 | Peak Ozone AQI |
Cornwall | July 1, 2023 | 0.079 | |
Danbury | July 1, 2023 | 0.083 | |
East Hartford | July 1, 2023 | 0.082 | |
Greenwich | July 1, 2023 | 0.082 | |
Groton | July 1, 2023 | 0.076 | |
Madison | July 1, 2023 | 0.077 | |
Middletown | July 1, 2023 | 0.080 | |
New Haven | July 1, 2023 | 0.072 | |
Stafford | July 1, 2023 | 0.076 | |
Stratford | July 1, 2023 | 0.086 | |
Westport | July 1, 2023 | 0.082 | |
Cornwall | June 30, 2023 | 0.078 | Peak Ozone AQI |
Danbury | June 30, 2023 | 0.085 | |
East Hartford | June 30, 2023 | 0.073 | |
Greenwich | June 30, 2023 | 0.081 | |
Madison | June 30, 2023 | 0.078 | |
New Haven | June 30, 2023 | 0.080 | |
Stratford | June 30, 2023 | 0.081 | |
Westport | June 30, 2023 | 0.079 | |
Danbury | June 11, 2023 | 0.072 | Peak Ozone AQI |
Greenwich | June 2, 2023 | 0.081 | Peak Ozone AQI |
Stratford | June 2, 2023 | 0.075 | |
Westport | June 2, 2023 | 0.080 | |
Cornwall | June 1, 2023 | 0.076 | Peak Ozone AQI |
Danbury | June 1, 2023 | 0.073 | |
East Harford | June 1, 2023 | 0.073 | |
Greenwich | June 1, 2023 | 0.073 | |
Westport | June 1, 2023 | 0.072 | |
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 |
---|---|---|---|
Martha's Vineyard | July 26, 2023 | 0.071 | Peak Ozone AQI |
Fairhaven | July 12, 2023 | 0.073 | Peak Ozone AQI |
Fall River | July 12, 2023 | 0.080 | |
Truro | July 12, 2023 | 0.071 | |
Martha's Vineyard | July 12, 2023 | 0.074 | |
Martha's Vineyard | July 11, 2023 | 0.074 | Peak Ozone AQI |
Chicopee | July 1, 2023 | 0.085 | Peak Ozone AQI |
Greenfield | July 1, 2023 | 0.083 | |
Pittsfield ES | July 1, 2023 | 0.081 | |
Ware | July 1, 2023 | 0.074 | |
Chicopee | June 30, 2023 | 0.075 | Peak Ozone AQI |
Fairhaven | June 30, 2023 | 0.078 | |
Fall River | June 30, 2023 | 0.071 | |
Martha's Vineyard | June 30, 2023 | 0.080 | |
Brockton | June 2, 2023 | 0.071 | Peak Ozone AQI |
East Milton | June 2, 2023 | 0.081 | |
Lynn | June 2, 2023 | 0.072 | |
East Milton | June 1, 2023 | 0.072 | Peak Ozone AQI |
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 |
---|---|---|---|
Keene | July 1, 2023 | 0.076 | Peak Ozone AQI |
Summit | July 1, 2023 | 0.071 | |
Miller State Park | June 11, 2023 | 0.072 | Peak Ozone AQI |
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 |
---|---|---|---|
East Matunuck | September 7, 2023 | 0.074 | Peak Ozone AQI |
East Matunuck | July 12, 2023 | 0.082 | Peak Ozone AQI |
Narragansett | July 12, 2023 | 0.078 | |
E Providence | July 1, 2023 | 0.074 | Peak Ozone AQI |
East Matunuck | July 1, 2023 | 0.076 | |
Narragansett | July 1, 2023 | 0.075 | |
East Matunuck | June 30, 2023 | 0.071 | Peak Ozone AQI |
Narragansett | June 30, 2023 | 0.078 | |
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 Matunuck | April 13, 2023 | 0.073 | Peak Ozone AQI |
East Providence | April 13, 2023 | 0.075 | |
Narragansett | April 13, 2023 | 0.081 | |
West Greenwich | April 13, 2023 | 0.078 |
Monitor Location | Date | Concentration (ppm) | AQI Map |
---|---|---|---|
Bennington | July 1, 2023 | 0.074 | Peak Ozone AQI |
Underhill | April 13, 2023 | 0.071 | Peak Ozone AQI |