Processed on 2024-03-04 13:07:46 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 Indiana 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 Indiana

March 2014 – 12 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 128 140 7 0 0 0 35
New 73 195 7 0 0 0 35

March 2015 – 13 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 197 141 0 0 0 0 34
New 143 195 0 0 0 0 34

March 2016 – 27 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 318 56 0 0 0 0 29
New 232 142 0 0 0 0 29

March 2017 – 13 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 319 52 0 0 0 0 32
New 241 130 0 0 0 0 32

March 2018 – 27 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 345 13 0 0 0 0 45
New 312 46 0 0 0 0 45

March 2019 – 13 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 257 90 0 0 0 0 56
New 191 156 0 0 0 0 56

March 2020 – 27 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 323 64 0 0 0 0 16
New 218 169 0 0 0 0 16

March 2021 – 13 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 293 79 0 0 0 0 31
New 236 136 0 0 0 0 31

March 2022 – 13 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 66 5 0 0 0 0 146
New 58 13 0 0 0 0 146

March 2023 – 24 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 367 71 0 0 0 0 27
New 260 178 0 0 0 0 27