Forecasted Ozone Exceedance Days

Year 2026

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	18	Monday	-
May	19	Tuesday	May 19, 2026
June	5	Friday	June 5, 2026
June	6	Saturday	June 6, 2026
June	11	Thursday	June 11, 2026
June	12	Friday	June 12, 2026
June	30	Tuesday	June 30, 2026
July	1	Wednesday	July 1, 2026
July	2	Thursday	July 2, 2026
July	3	Friday	July 3, 2026
July	4	Saturday	July 4, 2026
**July	9	Thursday	-
July	14	Tuesday	July 14, 2026
**July	27	Monday	-
August	1	Saturday	August 1, 2026
August	6	Thursday	August 6, 2026
August	7	Friday	August 7, 2026

*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.

2025 Forecasted Unhealthy Ozone Days

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