SmogRank / World / United States / North Carolina / September 2023
Most polluted cities in North Carolina, United States, September 2023
16 cities in North Carolina, United States ranked by their average PM2.5 over the 30 days. Worst: Winston-Salem at 8.9 µg/m³, #776 of 2,128 cities in the world. Cleanest: Murraysville at 5.3. A city needs measurements on 70% of the days to be ranked.
Ranked by unhealthy days: the share of each city's measured days with a daily mean over 35.4 µg/m³ (US AQI 101+), Unhealthy for Sensitive Groups or worse on the US EPA's scale. Ties go to the higher average.
- 1Winston-Salem 0%
- 2Raleigh 0%
- 3Fayetteville 0%
- 3Greensboro 0%
- 5Morrisville 0%
- 6Clemmons 0%
- 6Greenville 0%
- 8Charlotte 0%
- 8Clayton 0%
- 10Tarboro 0%
- 11Hickory 0%
- 12Lexington 0%
- 13Roanoke Rapids 0%
- 14Durham 0%
- 15Asheville 0%
- 16Murraysville 0%
The US EPA's Air Quality Index for PM2.5 (2024 breakpoints). Show values as: µg/m³ · US AQI · India AQI · China AQI · European AQI · UK DAQI · Canada AQHI+. About the scales
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SmogRank, most polluted cities in North Carolina, United States, PM2.5, September 2023, smogrank.com/us/region/north-carolina/history/2023-09 (accessed 7 Oct 2026).
You're welcome to reuse a single chart, image or figure with this citation and a link. Terms. Raw monitor readings in bulk are published by OpenAQ, under each provider's licence.