Forecasted Ozone Exceedance Days

Year 2025

The table below is the current list of forecasted days to have ozone Air Quality Index (AQI) levels of Unhealthy for Sensitive Groups (USG), or worse, anywhere in Connecticut.

Month	Day	Day of the Week	PDF
March		No Forecasted Exceedance Days	-
April		No Forecasted Exceedance Days	-
May		No Forecasted Exceedance Days	-
June	4	Wednesday	June 4, 2025
June	5	Thursday	June 5, 2025
**June	6	Friday	-
June	22	Sunday	June 22, 2025
June	23	Monday	June 23, 2025
June	24	Tuesday	June 24, 2025
June	25	Wednesday	June 25, 2025
July	6	Sunday	July 6, 2025
July	7	Monday	July 7, 2025
July	16	Wednesday	July 16, 2025
July	24	Thursday	July 24, 2025
July	25	Friday	July 25, 2025
July	29	Tuesday	July 29, 2025
July	30	Wednesday	July 30, 2025
**August	4	Monday	-
August	5	Tuesday	August 5, 2025
**August	11	Monday	-
August	12	Tuesday	August 12, 2025
August	13	Wednesday	August 13, 2025

*On a day marked with an *, the initial prediction of ozone conditions of "Moderate to Unhealthy for Sensitive Groups", or greater was revised to either "Good", or "Good to Moderate" or "Moderate" by 3 P.M. Therefore, on these days the regulated community is allowed to operate emergency engines, or other regulated equipment, after 3 P.M. on that given day. Any forecast that was "upgraded" (marked with an **) that day will not affect the forecast for the regulated community.

2024 Forecasted Unhealthy Ozone Days

2023 Forecasted Unhealthy Ozone Days

2022 Forecasted Unhealthy Ozone Days

2021 Forecasted Unhealthy Ozone Days

2020 Forecasted Unhealthy Ozone Days

2019 Forecasted Unhealthy Ozone Days

2018 Forecasted Unhealthy Ozone Days

2017 Forecasted Unhealthy Ozone Days

2016 Forecasted Unhealthy Ozone Days

2015 Forecasted Unhealthy Ozone Days

2014 Forecasted Unhealthy Ozone Days

2013 Forecasted Unhealthy Ozone Days