Worst air pollution Sumter, today and tomorrow
Today (9 August): Air quality in Sumter is fair. PM2.5 and O3 are fair; AQI and PM10 are medium; NO2, SO2, CO, HCHO, and PM1 are good. Pollution peaks around 9:00 PM (PM10: 40.1/100).
Tomorrow (10 August 2026): Air quality in Sumter is fair. AQI worsens to fair; PM2.5 decreases to good; PM10 increases to fair; all other pollutants stay as today. Pollution peaks around 1:00 PM (O3: 23.8/100). Airmine updates local air quality forecasts four times daily.
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Developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team
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Sumter's air quality reflects the flat South Carolina Coastal Plain position, with vehicle emissions from US-76 and the Shaw Air Force Base's military aviation operations contributing elevated NOₓ and aviation PM2.5 alongside primary vehicle sources. The flat coastal plain provides generally good wind dispersal, while summer ozone from regional vehicle and agricultural sources across the southeastern US airshed and the surrounding South Carolina pine forest's biogenic VOCs are the primary warm-season concerns.
Today - 9 August | Pollution peaks at 21:00
AQI:
Medium
40.1/100
PM2.5 (fine particles):
Fair
29.7/100
PM10 (coarse particles):
Medium
40.1/100
NO2 (nitrogen dioxide):
Good
2.9/100
O3 (ozone):
Fair
24.1/100
SO2 (sulfur dioxide):
Good
4.7/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
1.4/100
PM1 (ultrafine particles):
Good
8.5/100
Levels show the poorest local air quality during the day
Tomorrow - 10 August | Pollution peaks at 13:00
AQI:
Fair
23.8/100
PM2.5 (fine particles):
Good
19.7/100
PM10 (coarse particles):
Fair
20.8/100
NO2 (nitrogen dioxide):
Good
6.2/100
O3 (ozone):
Fair
23.8/100
SO2 (sulfur dioxide):
Good
5.4/100
CO (carbon monoxide):
Good
0.0/100
HCHO (formaldehyde):
Good
2.4/100
PM1 (ultrafine particles):
Good
8.8/100
Pollen forecast in Sumter
View pollen forecastFrequently Asked Questions
Is air quality bad in Sumter right now?
On 9 August 2026, overall air quality in Sumter is fair. PM2.5 is the main pollutant at 29.7/100. Pollution peaks around 9:00 PM (PM10: 40.1/100).
Will air quality be worse tomorrow in Sumter?
On 10 August 2026, air quality conditions in Sumter will be similar to today, with AQI forecast at fair at 23.8/100. Pollution peaks around 1:00 PM (O3: 23.8/100).
When is air pollution at its worst in Sumter?
Seasonal changes shape air quality across Sumter — the cleanest conditions usually arrive in winter, once the humid summer ozone season has ended, whereas summer heat, humidity, and emissions from surrounding forests combine to drive ozone levels up. Occasional agricultural or prescribed-burning smoke can add short-lived particulate spikes outside the main summer ozone season.
Are air quality levels in Sumter based on measurements or forecasts?
It is forecasts derived by downscaling forecasts provided by EU’s Copernicus Atmosphere Monitoring Service (CAMS) by taking into account local conditions such as traffic patterns. CAMS bases its forecast on satellite measurements of particles and chemical compounds in the atmosphere. Airmine’s services were developed with support from the European Space Agency (ESA)’s Business Applications and Space Solutions (BASS) team.
Why doesn’t the forecast always reflect wildfire impacts?
Airmine’s forecast uses CAMS (Copernicus Atmosphere Monitoring Service) as its background atmospheric model. While CAMS includes wildfire emissions, these are derived from satellite observations and are not available in real time. During rapidly evolving wildfire events, there may therefore be a delay before increased emissions are incorporated into the model. As a result, the forecast may temporarily underestimate PM₂.₅ and other pollutants associated with wildfire smoke.
During rapidly evolving wildfire events, CAMS may lag by approximately 1–2 days before increased wildfire emissions are fully represented, which can lead to temporary underestimation of PM₂.₅ concentrations in Airmine’s forecast.
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Data provided by Airmine — Last update: 9 August 2026 at 20:27 CEST (Data is updated four times daily.)
This forecast is produced independently using Airmine's own atmospheric data and models.
Unless explicitly made clear, the content on this site has not been paid for by external organisations and is Airmine's sole responsibility.
Disclaimer: Forecasts are provided for informational purposes only and should not be relied upon as medical advice. Actual pollen and air quality conditions may vary from the forecast. If you have allergies, asthma, or another medical condition, consult a healthcare professional. Please see our Terms of Service for important information about limitations of liability.
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