Processed on 2024-03-04 13:50:02 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 June.

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.

June in Ohio

June 2014 – 16 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 241 235 0 0 0 0 20
New 139 337 0 0 0 0 20

June 2015 – 16 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 296 179 0 0 0 0 21
New 173 302 0 0 0 0 21

June 2016 – 32 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 352 92 0 0 0 0 52
New 253 191 0 0 0 0 52

June 2017 – 18 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 431 70 0 0 0 0 57
New 338 163 0 0 0 0 57

June 2018 – 39 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 393 112 0 0 0 0 53
New 281 224 0 0 0 0 53

June 2019 – 20 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 478 50 0 0 0 0 61
New 355 173 0 0 0 0 61

June 2020 – 40 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 495 75 0 0 0 0 50
New 375 195 0 0 0 0 50

June 2021 – 24 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 496 93 0 0 0 0 62
New 334 255 0 0 0 0 62

June 2022 – 26 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 523 120 1 1 0 0 99
New 365 278 1 1 0 0 99

June 2023 – 41 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 256 488 96 57 10 0 85
New 153 587 100 51 16 0 85