Processed on 2024-03-04 12:53:20 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 January.

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.

January in Connecticut

January 2014 – 8 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 117 118 7 0 0 0 6
New 60 175 7 0 0 0 6

January 2015 – 8 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 171 65 0 0 0 0 12
New 124 112 0 0 0 0 12

January 2016 – 16 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 189 46 0 0 0 0 13
New 162 73 0 0 0 0 13

January 2017 – 8 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 179 53 0 0 0 0 16
New 138 94 0 0 0 0 16

January 2018 – 16 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 173 71 0 0 0 0 4
New 146 98 0 0 0 0 4

January 2019 – 8 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 216 29 0 0 0 0 3
New 177 68 0 0 0 0 3

January 2020 – 16 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 207 41 0 0 0 0 0
New 173 75 0 0 0 0 0

January 2021 – 8 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 206 42 0 0 0 0 0
New 187 61 0 0 0 0 0

January 2022 – 8 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 181 67 0 0 0 0 0
New 146 102 0 0 0 0 0

January 2023 – 8 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 218 26 0 0 0 0 4
New 194 50 0 0 0 0 4