Processed on 2024-03-04 14:17:18 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 Wisconsin 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 Wisconsin

February 2014 – 13 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 189 156 0 0 0 0 19
New 137 208 0 0 0 0 19

February 2015 – 13 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 263 92 0 0 0 0 9
New 186 169 0 0 0 0 9

February 2016 – 29 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 283 72 0 0 0 0 22
New 252 103 0 0 0 0 22

February 2017 – 16 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 294 57 0 0 0 0 13
New 243 108 0 0 0 0 13

February 2018 – 33 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 354 64 0 0 0 0 2
New 284 134 0 0 0 0 2

February 2019 – 17 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 299 114 1 0 0 0 6
New 236 177 1 0 0 0 6

February 2020 – 35 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 464 50 0 0 0 0 8
New 348 166 0 0 0 0 8

February 2021 – 18 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 346 155 3 0 0 0 0
New 283 218 3 0 0 0 0

February 2022 – 18 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 387 111 0 0 0 0 6
New 327 171 0 0 0 0 6

February 2023 – 19 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 435 69 0 0 0 0 0
New 340 164 0 0 0 0 0