Processed on 2024-03-04 12:47:19 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 Arkansas spent in each AQI category during the the month of March.

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.

March in Arkansas

March 2014 – 7 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 95 60 0 0 0 0 0
New 50 105 0 0 0 0 0

March 2015 – 5 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 144 11 0 0 0 0 0
New 95 60 0 0 0 0 0

March 2016 – 10 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 138 12 0 0 0 0 5
New 112 38 0 0 0 0 5

March 2017 – 5 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 128 27 0 0 0 0 0
New 93 62 0 0 0 0 0

March 2018 – 10 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 127 28 0 0 0 0 0
New 80 75 0 0 0 0 0

March 2019 – 5 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 141 14 0 0 0 0 0
New 103 52 0 0 0 0 0

March 2020 – 8 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 110 12 0 0 0 0 2
New 84 38 0 0 0 0 2

March 2021 – 4 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 104 15 0 0 0 0 5
New 79 40 0 0 0 0 5

March 2022 – 4 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 77 15 0 0 0 0 1
New 65 27 0 0 0 0 1

March 2023 – 4 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 104 19 0 0 0 0 1
New 75 48 0 0 0 0 1