Processed on 2024-03-04 13:49:10 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 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 Ohio

January 2014 – 16 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 361 89 1 0 0 0 45
New 241 209 1 0 0 0 45

January 2015 – 16 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 282 180 0 0 0 0 34
New 195 267 0 0 0 0 34

January 2016 – 32 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 395 97 1 0 0 0 3
New 281 211 1 0 0 0 3

January 2017 – 18 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 416 75 0 0 0 0 5
New 332 159 0 0 0 0 5

January 2018 – 39 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 410 135 1 0 0 0 12
New 305 240 1 0 0 0 12

January 2019 – 20 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 445 116 0 0 0 0 28
New 314 247 0 0 0 0 28

January 2020 – 40 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 514 68 0 0 0 0 38
New 421 161 0 0 0 0 38

January 2021 – 24 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 489 110 0 0 0 0 21
New 375 224 0 0 0 0 21

January 2022 – 26 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 594 197 0 0 0 0 15
New 415 375 1 0 0 0 15

January 2023 – 41 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 644 150 0 0 0 0 12
New 481 313 0 0 0 0 12