Processed on 2024-03-04 12:55:30 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 Delaware spent in each AQI category during the the month of February.

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.

February in Delaware

February 2014 – 3 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 42 42 0 0 0 0 0
New 26 58 0 0 0 0 0

February 2015 – 3 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 53 31 0 0 0 0 0
New 36 48 0 0 0 0 0

February 2016 – 6 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 27 2 0 0 0 0 0
New 25 4 0 0 0 0 0

February 2017 – 3 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 64 14 0 0 0 0 6
New 47 31 0 0 0 0 6

February 2018 – 8 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 75 9 0 0 0 0 0
New 63 21 0 0 0 0 0

February 2019 – 5 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 105 35 0 0 0 0 0
New 82 58 0 0 0 0 0

February 2020 – 10 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 120 21 0 0 0 0 4
New 94 47 0 0 0 0 4

February 2021 – 5 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 103 37 0 0 0 0 0
New 82 58 0 0 0 0 0

February 2022 – 6 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 134 32 0 0 0 0 2
New 102 64 0 0 0 0 2

February 2023 – 8 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 147 39 0 0 0 0 38
New 114 72 0 0 0 0 38