Processed on 2024-03-04 13:27:48 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 Mississippi spent in each AQI category during the the month of May.

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.

May in Mississippi

May 2014 – 4 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 87 36 0 0 0 0 5
New 44 79 0 0 0 0 5

May 2015 – 5 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 136 19 0 0 0 0 5
New 94 61 0 0 0 0 5

May 2016 – 10 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 112 8 0 0 0 0 8
New 65 55 0 0 0 0 8

May 2017 – 7 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 109 19 0 0 0 0 32
New 69 59 0 0 0 0 32

May 2018 – 16 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 155 62 0 0 0 0 7
New 95 122 0 0 0 0 7

May 2019 – 8 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 204 13 0 0 0 0 7
New 139 78 0 0 0 0 7

May 2020 – 16 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 203 14 0 0 0 0 7
New 157 60 0 0 0 0 7

May 2021 – 8 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 201 12 0 0 0 0 11
New 152 61 0 0 0 0 11

May 2022 – 8 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 207 41 0 0 0 0 8
New 124 124 0 0 0 0 8

May 2023 – 8 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 135 113 0 0 0 0 8
New 65 183 0 0 0 0 8