Processed on 2024-03-04 12:53:30 PST.

Disclaimer: Data presented here come from a variety of sources and do not represent official EPA measurements. Please visit AirNow for official measurements.

Cumulative exposure to smoke is an important public health metric. This report summarizes the cumulative number of days air quality monitors in Connecticut spent in each AQI category during the the month of February.

The tables below include only permanent monitors measuring PM2.5 and show cumulative exposure under existing NAAQS (National Ambient Air Quality Standards) and under the 2024 revised standards for PM2.5.

In the tables and plots below, ‘Old’ designates cumulative days calculated using the 2023 PM2.5 NAAQS while ‘New’ is calculated using the 2024 revised PM2.5 NAAQS. The impact of the NAAQS revision is quite clear.

February in Connecticut

February 2014 – 8 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 72 138 2 0 0 0 12
New 31 179 2 0 0 0 12

February 2015 – 8 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 117 102 0 0 0 0 5
New 80 138 1 0 0 0 5

February 2016 – 16 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 186 23 0 0 0 0 23
New 161 48 0 0 0 0 23

February 2017 – 8 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 165 32 0 0 0 0 27
New 130 67 0 0 0 0 27

February 2018 – 16 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 193 30 0 0 0 0 1
New 157 66 0 0 0 0 1

February 2019 – 8 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 190 29 3 0 0 0 2
New 170 49 3 0 0 0 2

February 2020 – 16 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 180 50 0 0 0 0 2
New 134 96 0 0 0 0 2

February 2021 – 8 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 176 33 0 0 0 0 15
New 144 65 0 0 0 0 15

February 2022 – 8 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 181 39 0 0 0 0 4
New 155 65 0 0 0 0 4

February 2023 – 8 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 188 36 0 0 0 0 0
New 140 84 0 0 0 0 0