Processed on 2024-03-04 13:56:10 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 Pennsylvania 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 Pennsylvania

June 2014 – 2 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 25 35 0 0 0 0 2
New 13 47 0 0 0 0 2

June 2015 – 3 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 20 10 0 0 0 0 1
New 11 19 0 0 0 0 1

June 2016 – 31 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 35 25 0 0 0 0 2
New 18 42 0 0 0 0 2

June 2017 – 3 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 53 32 0 0 0 0 8
New 36 49 0 0 0 0 8

June 2018 – 52 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 47 43 0 0 0 0 3
New 27 63 0 0 0 0 3

June 2019 – 28 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 419 77 0 0 0 0 62
New 324 172 0 0 0 0 62

June 2020 – 75 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 1002 30 0 0 0 0 146
New 803 229 0 0 0 0 146

June 2021 – 42 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 997 163 0 0 0 0 111
New 711 448 1 0 0 0 111

June 2022 – 45 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 950 167 0 0 0 0 154
New 719 398 0 0 0 0 154

June 2023 – 46 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 353 516 51 100 22 1 73
New 228 637 55 82 38 3 73