Processed on 2024-03-04 13:07:24 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 Indiana spent in each AQI category during the the month of January.

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.

January in Indiana

January 2014 – 12 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 226 56 4 0 0 0 24
New 168 114 4 0 0 0 24

January 2015 – 13 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 213 155 0 0 0 0 4
New 130 238 0 0 0 0 4

January 2016 – 27 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 288 105 0 0 0 0 10
New 193 200 0 0 0 0 10

January 2017 – 13 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 282 85 0 0 0 0 36
New 185 182 0 0 0 0 36

January 2018 – 27 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 295 105 0 0 0 0 3
New 190 210 0 0 0 0 3

January 2019 – 13 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 317 83 0 0 0 0 3
New 232 168 0 0 0 0 3

January 2020 – 27 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 303 84 0 0 0 0 16
New 206 181 0 0 0 0 16

January 2021 – 13 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 307 90 0 0 0 0 6
New 191 206 0 0 0 0 6

January 2022 – 13 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 263 98 3 0 0 0 8
New 179 181 4 0 0 0 8

January 2023 – 24 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 266 110 0 0 0 0 27
New 183 193 0 0 0 0 27