Processed on 2024-03-04 14:03:28 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 Tennessee 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 Tennessee

February 2014 – 6 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 108 60 0 0 0 0 0
New 57 111 0 0 0 0 0

February 2015 – 6 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 133 35 0 0 0 0 0
New 62 106 0 0 0 0 0

February 2016 – 13 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 141 16 0 0 0 0 17
New 119 38 0 0 0 0 17

February 2017 – 7 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 115 36 0 0 0 0 17
New 74 77 0 0 0 0 17

February 2018 – 16 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 183 7 0 0 0 0 6
New 146 44 0 0 0 0 6

February 2019 – 8 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 196 24 0 0 0 0 4
New 161 59 0 0 0 0 4

February 2020 – 16 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 219 8 0 0 0 0 5
New 196 31 0 0 0 0 5

February 2021 – 9 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 216 7 0 0 0 0 1
New 177 46 0 0 0 0 1

February 2022 – 10 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 212 21 0 0 0 0 19
New 176 57 0 0 0 0 19

February 2023 – 11 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 245 27 0 0 0 0 8
New 185 87 0 0 0 0 8