Processed on 2024-03-04 14:03:19 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 Tennessee spent in each AQI category during the the month of January.

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.

January in Tennessee

January 2014 – 6 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 152 33 0 0 0 0 1
New 117 68 0 0 0 0 1

January 2015 – 6 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 157 29 0 0 0 0 0
New 109 77 0 0 0 0 0

January 2016 – 13 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 140 19 0 0 0 0 27
New 103 56 0 0 0 0 27

January 2017 – 7 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 117 22 30 2 0 0 15
New 94 43 32 2 0 0 15

January 2018 – 16 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 148 33 0 0 0 0 36
New 116 65 0 0 0 0 36

January 2019 – 8 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 233 8 0 0 0 0 7
New 195 46 0 0 0 0 7

January 2020 – 16 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 233 9 0 0 0 0 6
New 212 30 0 0 0 0 6

January 2021 – 9 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 222 21 0 0 0 0 5
New 186 57 0 0 0 0 5

January 2022 – 10 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 203 21 0 0 0 0 24
New 157 67 0 0 0 0 24

January 2023 – 11 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 272 30 0 0 0 0 8
New 223 79 0 0 0 0 8