Processed on 2024-03-04 12:43:23 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 Alabama 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 Alabama

March 2014 – 9 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 143 92 1 0 0 0 12
New 77 158 1 0 0 0 12

March 2015 – 15 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 204 31 0 0 0 0 13
New 141 94 0 0 0 0 13

March 2016 – 23 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 259 59 0 0 0 0 23
New 152 166 0 0 0 0 23

March 2017 – 12 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 261 78 0 0 0 0 33
New 186 153 0 0 0 0 33

March 2018 – 22 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 204 67 0 0 0 0 39
New 144 127 0 0 0 0 39

March 2019 – 10 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 193 57 0 0 0 0 60
New 138 112 0 0 0 0 60

March 2020 – 21 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 191 54 0 0 0 0 3
New 140 105 0 0 0 0 3

March 2021 – 11 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 221 89 1 0 0 0 30
New 158 152 1 0 0 0 30

March 2022 – 20 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 244 58 0 0 0 0 8
New 184 118 0 0 0 0 8

March 2023 – 14 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 258 136 1 0 0 0 8
New 204 190 1 0 0 0 8