Processed on 2024-03-04 13:50:40 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 Ohio 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 Ohio

October 2014 – 16 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 407 78 0 0 0 0 27
New 288 197 0 0 0 0 27

October 2015 – 16 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 388 68 0 0 0 0 56
New 309 147 0 0 0 0 56

October 2016 – 32 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 385 43 0 0 0 0 84
New 307 121 0 0 0 0 84

October 2017 – 18 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 458 79 0 0 0 0 39
New 384 153 0 0 0 0 39

October 2018 – 39 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 535 50 0 0 0 0 23
New 454 131 0 0 0 0 23

October 2019 – 20 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 483 61 0 0 0 0 64
New 407 137 0 0 0 0 64

October 2020 – 40 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 548 41 0 0 0 0 51
New 460 129 0 0 0 0 51

October 2021 – 24 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 661 62 0 0 0 0 45
New 520 203 0 0 0 0 45

October 2022 – 26 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 674 109 0 0 0 0 49
New 536 247 0 0 0 0 49

October 2023 – 41 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 1069 56 0 0 0 0 123
New 906 219 0 0 0 0 123