SmogRank / World / United States / Kentucky / April 2023
Most polluted cities in Kentucky, United States, April 2023
14 cities in Kentucky, United States ranked by their average PM2.5 over the 30 days. Worst: Valley Station at 10.7 µg/m³, #340 of 1,567 cities in the world. Cleanest: Oak Grove at 6.5. A city needs measurements on 70% of the days to be ranked.
OpenAQ's archive, where our readings come from, has almost none for 3 of these 30 days. Cities in the United States and Europe have them from the EPA's and the European Environment Agency's own records of the same monitors; elsewhere a city's average is over its other days. Why.
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.
- 1Valley Station 0%
- 2Louisville 0%
- 3Owensboro 0%
- 4Jeffersontown 0%
- 5Hazard 0%
- 5Middlesboro 0%
- 7Ashland 0%
- 7Saint Matthews 0%
- 9Paducah 0%
- 10Elizabethtown 0%
- 10Lexington-Fayette 0%
- 12Somerset 0%
- 13Pikeville 0%
- 14Oak Grove 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
All cities in the world, April 2023 · All cities in United States, April 2023 · Kentucky now
Use this board
SmogRank, most polluted cities in Kentucky, United States, PM2.5, April 2023, smogrank.com/us/region/kentucky/history/2023-04 (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.