Processed on 2024-03-04 13:03:34 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 Idaho spent in each AQI category during the the month of March.

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.

March in Idaho

March 2014 – 9 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 95 2 0 0 0 0 27
New 95 1 1 0 0 0 27

March 2015 – 17 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 114 2 0 0 0 0 39
New 111 5 0 0 0 0 39

March 2016 – 32 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 220 11 0 0 0 0 17
New 209 22 0 0 0 0 17

March 2017 – 19 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 238 3 0 0 0 0 7
New 235 6 0 0 0 0 7

March 2018 – 37 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 289 20 0 0 0 0 1
New 276 33 0 0 0 0 1

March 2019 – 22 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 381 4 0 0 0 0 80
New 355 30 0 0 0 0 80

March 2020 – 34 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 399 8 0 0 0 0 27
New 380 27 0 0 0 0 27

March 2021 – 19 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 326 24 0 0 0 0 53
New 284 66 0 0 0 0 53

March 2022 – 23 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 337 7 0 0 0 0 59
New 324 20 0 0 0 0 59

March 2023 – 17 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 342 2 0 0 0 0 28
New 334 10 0 0 0 0 28