SmogRank / World / United States / North Carolina / October 2023
Most polluted cities in North Carolina, United States, October 2023
16 cities in North Carolina, United States ranked by their average PM2.5 over the 31 days. Worst: Greensboro at 8.6 µg/m³, #569 of 1,965 cities in the world. Cleanest: Asheville at 4.9. 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.
- 1Greensboro 0%
- 2Charlotte 0%
- 3Winston-Salem 0%
- 4Marvin 0%
- 4Raleigh 0%
- 6Lexington 0%
- 6Morrisville 0%
- 8Greenville 0%
- 9Tarboro 0%
- 10Clayton 0%
- 11Clemmons 0%
- 12Fayetteville 0%
- 12Murraysville 0%
- 14Durham 0%
- 15Roanoke Rapids 0%
- 16Asheville 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, October 2023, smogrank.com/us/region/north-carolina/history/2023-10 (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.