Processed on 2024-03-04 14:00:20 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 July.

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.

July in South Carolina

July 2014 – 7 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 145 60 2 0 0 0 17
New 76 129 2 0 0 0 17

July 2015 – 7 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 101 110 0 0 0 0 13
New 50 161 0 0 0 0 13

July 2016 – 15 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 167 29 0 0 0 0 28
New 111 85 0 0 0 0 28

July 2017 – 9 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 189 30 0 0 0 0 37
New 142 77 0 0 0 0 37

July 2018 – 19 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 201 28 0 0 0 0 59
New 150 79 0 0 0 0 59

July 2019 – 9 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 221 38 0 0 0 0 29
New 133 126 0 0 0 0 29

July 2020 – 18 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 211 19 1 0 0 0 25
New 164 66 1 0 0 0 25

July 2021 – 9 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 154 59 1 0 0 0 10
New 119 93 2 0 0 0 10

July 2022 – 10 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 287 7 0 0 0 0 26
New 249 45 0 0 0 0 26

July 2023 – 11 permanent monitors

Good Moderate USG Unhealthy Very Unhealthy Hazardous Missing
Old 225 70 8 0 0 0 49
New 151 144 8 0 0 0 49