Processed on 2024-03-04 13:59:19 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 South Carolina 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 South Carolina

January 2014 – 7 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 186 20 0 0 0 0 11
New 144 62 0 0 0 0 11

January 2015 – 7 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 130 23 0 0 0 0 33
New 96 57 0 0 0 0 33

January 2016 – 15 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 139 9 0 0 0 0 38
New 103 45 0 0 0 0 38

January 2017 – 9 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 158 27 0 0 0 0 32
New 126 59 0 0 0 0 32

January 2018 – 19 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 187 29 0 0 0 0 32
New 146 69 1 0 0 0 32

January 2019 – 9 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 220 3 0 0 0 0 25
New 193 30 0 0 0 0 25

January 2020 – 18 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 198 4 0 0 0 0 46
New 182 20 0 0 0 0 46

January 2021 – 9 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 222 8 0 0 0 0 18
New 205 25 0 0 0 0 18

January 2022 – 10 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 202 24 0 0 0 0 22
New 155 71 0 0 0 0 22

January 2023 – 11 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 229 30 0 0 0 0 20
New 168 91 0 0 0 0 20