Processed on 2024-03-04 13:25:09 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 Minnesota 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 Minnesota

January 2014 – 17 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 398 49 0 0 0 0 18
New 365 82 0 0 0 0 18

January 2015 – 18 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 441 79 0 0 0 0 7
New 366 154 0 0 0 0 7

January 2016 – 37 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 369 157 0 0 0 0 32
New 307 219 0 0 0 0 32

January 2017 – 19 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 421 127 0 0 0 0 10
New 326 222 0 0 0 0 10

January 2018 – 40 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 482 102 0 0 0 0 5
New 365 219 0 0 0 0 5

January 2019 – 21 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 546 64 0 0 0 0 10
New 476 134 0 0 0 0 10

January 2020 – 42 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 544 96 0 0 0 0 11
New 449 191 0 0 0 0 11

January 2021 – 21 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 471 158 0 0 0 0 22
New 395 234 0 0 0 0 22

January 2022 – 21 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 591 43 0 0 0 0 17
New 501 133 0 0 0 0 17

January 2023 – 21 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 466 141 19 3 0 0 22
New 374 232 20 3 0 0 22