SmogRank / World / United States / Kentucky / January 2026
Most polluted cities in Kentucky, United States, January 2026
17 cities in Kentucky, United States ranked by their average PM2.5 over the 31 days. Worst: Flatwoods at 10.2 µg/m³, #1,078 of 2,593 cities in the world. Cleanest: Pikeville at 5.6. 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.
- 1Flatwoods 0%
- 2Valley Station 0%
- 3Louisville 0%
- 4Ashland 0%
- 4Middlesboro 0%
- 4Owensboro 0%
- 7Saint Matthews 0%
- 8Elizabethtown 0%
- 9Jeffersontown 0%
- 9Somerset 0%
- 11Oak Grove 0%
- 12Lexington-Fayette 0%
- 13Nicholasville 0%
- 14Paducah 0%
- 15Highland Heights 0%
- 16Hazard 0%
- 17Pikeville 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 Kentucky, United States, PM2.5, January 2026, smogrank.com/us/region/kentucky/history/2026-01 (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.