SmogRank / World / United States / North Carolina / March 2025
Most polluted cities in North Carolina, United States, March 2025
17 cities in North Carolina, United States ranked by their average PM2.5 over the 31 days. Worst: Murraysville at 10.6 µg/m³, #1,480 of 2,809 cities in the world. Cleanest: Greenville at 5.9. 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.
- 1Murraysville 6%
- 2Marvin 0%
- 3Charlotte 0%
- 3Lexington 0%
- 5Hickory 0%
- 6Wake Forestlow-cost sensors 0%
- 7Morrisville 0%
- 8Clayton 0%
- 9Raleigh 0%
- 9Winston-Salem 0%
- 11Asheville 0%
- 12Clemmons 0%
- 12Fayetteville 0%
- 14Greensboro 0%
- 14Roanoke Rapids 0%
- 16Tarboro 0%
- 17Greenville 0%
Low-cost sensors: consumer units, counted only in cities with no government-grade monitor; they read close to reference monitors on the whole, but 15 to 25% high in humid air. How we use them.
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
All cities in the world, March 2025 · All cities in United States, March 2025 · North Carolina now
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SmogRank, most polluted cities in North Carolina, United States, PM2.5, March 2025, smogrank.com/us/region/north-carolina/history/2025-03 (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.