Processed on 2024-03-04 12:54:18 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 July.

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.

July in Connecticut

July 2014 – 8 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 201 39 0 0 0 0 16
New 147 93 0 0 0 0 16

July 2015 – 8 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 174 61 0 0 0 0 21
New 122 113 0 0 0 0 21

July 2016 – 16 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 181 27 0 0 0 0 16
New 140 68 0 0 0 0 16

July 2017 – 8 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 189 10 0 0 0 0 57
New 163 36 0 0 0 0 57

July 2018 – 16 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 182 50 0 0 0 0 24
New 131 101 0 0 0 0 24

July 2019 – 8 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 188 57 0 0 0 0 11
New 103 142 0 0 0 0 11

July 2020 – 16 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 221 27 0 0 0 0 8
New 148 100 0 0 0 0 8

July 2021 – 8 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 161 68 17 0 0 0 10
New 115 114 17 0 0 0 10

July 2022 – 8 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 216 31 0 0 0 0 9
New 177 70 0 0 0 0 9

July 2023 – 8 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 156 85 7 0 0 0 8
New 89 152 7 0 0 0 8