Processed on 2024-03-04 14:17:08 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 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 Wisconsin

January 2014 – 13 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 339 64 0 0 0 0 0
New 275 128 0 0 0 0 0

January 2015 – 13 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 319 83 0 0 0 0 1
New 238 164 0 0 0 0 1

January 2016 – 29 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 300 103 0 0 0 0 0
New 216 187 0 0 0 0 0

January 2017 – 16 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 264 69 0 0 0 0 101
New 206 127 0 0 0 0 101

January 2018 – 33 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 354 75 0 0 0 0 5
New 263 166 0 0 0 0 5

January 2019 – 17 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 391 55 0 0 0 0 19
New 315 131 0 0 0 0 19

January 2020 – 35 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 351 125 0 0 0 0 82
New 286 190 0 0 0 0 82

January 2021 – 18 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 347 209 0 0 0 0 2
New 270 286 0 0 0 0 2

January 2022 – 18 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 468 76 0 0 0 0 14
New 332 212 0 0 0 0 14

January 2023 – 19 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 396 156 2 0 0 0 4
New 283 269 2 0 0 0 4