SmogRank / World / United States / North Carolina / April 2025
Most polluted cities in North Carolina, United States, April 2025
16 cities in North Carolina, United States ranked by their average PM2.5 over the 30 days. Worst: Durham at 9.3 µg/m³, #1,368 of 2,896 cities in the world. Cleanest: Greenville at 6.2. 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.
- 1Durham 0%
- 2Charlotte 0%
- 3Morrisville 0%
- 4Marvin 0%
- 4Winston-Salem 0%
- 6Clemmons 0%
- 6Hickory 0%
- 8Clayton 0%
- 9Raleigh 0%
- 10Fayetteville 0%
- 10Roanoke Rapids 0%
- 12Greensboro 0%
- 13Murraysville 0%
- 14Asheville 0%
- 15Tarboro 0%
- 16Greenville 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, April 2025, smogrank.com/us/region/north-carolina/history/2025-04 (accessed 6 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.