Processed on 2024-03-04 13:29:14 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 Missouri 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 Missouri

February 2014 – 12 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 191 140 2 0 0 0 3
New 148 182 3 0 0 0 3

February 2015 – 13 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 208 122 2 0 0 0 4
New 108 222 2 0 0 0 4

February 2016 – 27 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 314 61 0 0 0 0 2
New 245 130 0 0 0 0 2

February 2017 – 13 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 223 77 0 0 0 0 8
New 168 132 0 0 0 0 8

February 2018 – 26 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 264 46 0 0 0 0 26
New 214 96 0 0 0 0 26

February 2019 – 13 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 250 63 0 0 0 0 23
New 180 133 0 0 0 0 23

February 2020 – 27 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 326 15 0 0 0 0 7
New 278 63 0 0 0 0 7

February 2021 – 14 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 309 50 0 0 0 0 5
New 242 117 0 0 0 0 5

February 2022 – 13 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 308 40 0 0 0 0 16
New 268 80 0 0 0 0 16

February 2023 – 12 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 308 24 0 0 0 0 4
New 258 74 0 0 0 0 4