Processed on 2024-03-04 13:03:24 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 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 Idaho

February 2014 – 9 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 78 1 0 0 0 0 5
New 76 3 0 0 0 0 5

February 2015 – 17 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 54 0 0 0 0 0 2
New 54 0 0 0 0 0 2

February 2016 – 32 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 154 41 8 0 0 0 0
New 136 58 9 0 0 0 0

February 2017 – 19 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 174 29 2 0 0 0 19
New 163 40 2 0 0 0 19

February 2018 – 37 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 246 24 0 0 0 0 10
New 223 47 0 0 0 0 10

February 2019 – 22 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 303 29 1 0 0 0 3
New 274 58 1 0 0 0 3

February 2020 – 34 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 333 43 1 0 0 0 0
New 288 88 1 0 0 0 0

February 2021 – 19 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 288 20 0 0 0 0 0
New 255 53 0 0 0 0 0

February 2022 – 23 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 230 77 0 0 0 0 1
New 175 132 0 0 0 0 1

February 2023 – 17 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 256 47 4 1 0 0 0
New 219 84 4 1 0 0 0