Processed on 2024-03-04 13:08:58 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 October.

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.

October in Indiana

October 2014 – 12 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 273 52 0 0 0 0 59
New 214 111 0 0 0 0 59

October 2015 – 13 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 272 61 0 0 0 0 51
New 205 128 0 0 0 0 51

October 2016 – 27 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 291 59 0 0 0 0 66
New 204 146 0 0 0 0 66

October 2017 – 13 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 328 32 0 0 0 0 56
New 265 95 0 0 0 0 56

October 2018 – 27 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 335 13 0 0 0 0 68
New 254 94 0 0 0 0 68

October 2019 – 13 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 317 39 1 0 0 0 59
New 242 114 1 0 0 0 59

October 2020 – 27 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 310 50 0 0 0 0 56
New 240 120 0 0 0 0 56

October 2021 – 13 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 330 52 0 0 0 0 34
New 239 143 0 0 0 0 34

October 2022 – 13 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 278 67 3 0 0 0 36
New 203 142 3 0 0 0 36

October 2023 – 24 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 400 33 0 0 0 0 303
New 339 94 0 0 0 0 303