SmogRank / World / North America / United States / Kentucky

Most polluted cities in Kentucky, United States

9 measured cities, last 24 hours; 0 above the WHO 24-hour guideline. Worst: Louisville at 13.4 µg/m³, #153 in the world.

Ohio: 21 measured citiesNorth Carolina: 9 measured citiesVirginia: 9 measured citiesMissouri: 5 measured citiesIllinois: 24 measured citiesKentucky: 9 measured citiesArkansas: 1 measured cityTennessee: 7 measured citiesWest Virginia: 4 measured citiesIndiana: 14 measured cities#9 Ashland: 9.9 µg/m³#8 Owensboro: 10.2 µg/m³#6 Fort Thomas: 10.5 µg/m³#7 Nicholasville: 10.5 µg/m³#5 Jeffersontown: 11.5 µg/m³#4 Elizabethtown: 12.5 µg/m³#3 Saint Matthews: 12.6 µg/m³#2 Valley Station: 13.2 µg/m³#1 Louisville: 13.4 µg/m³
Each dot is a measured city, coloured by its PM2.5; tap a dot to open the city.
← Louisville 13.4 µg/m³ 15 µg/m³ WHO 24-hour guideline0
Every measured city in Kentucky, United States, one column each, worst on the left and cleanest on the right; height is PM2.5 in µg/m³. Point at it to read a city; tap to open it.
  1. 1Louisville 590.9×
  2. 2Valley Station 590.9×
  3. 3Saint Matthews 580.8×
  4. 4Elizabethtown 570.8×
  5. 5Jeffersontown 550.8×
  6. 6Fort Thomas 540.7×
  7. 7Nicholasville 540.7×
  8. 8Owensboro 530.7×
  9. 9Ashland 520.7×
Good0–50
Moderate51–100
Sensitive groups101–150
Unhealthy151–200
Very unhealthy201–300
Hazardous301+

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

Estimated: cities without a monitor

Kentucky cities we can't measure, with model estimates for the last 7 days. Listed by population, not ranked: estimates aren't precise enough to rank. Model estimates from the Copernicus Atmosphere Monitoring Service (CAMS), adjusted to measured cities nearby where there are any. Adjusted, a single day lands within ×1.5 of what a monitor would read about two times in three; unadjusted, it can be off by half or double. Treat them as a guide, not a measurement.

City7-day estimateBand
Lexington≈ 5 µg/m³Good
Meads≈ 5 µg/m³Good
Bowling Green≈ 4 µg/m³Good
Covington≈ 6 µg/m³Good
Richmond≈ 4 µg/m³Good
Georgetown≈ 4 µg/m³Good
Florence≈ 4 µg/m³Good
Hopkinsville≈ 5 µg/m³Good
Henderson≈ 7 µg/m³Good
Frankfort≈ 4 µg/m³Good
Independence≈ 5 µg/m³Good
Radcliff≈ 7 µg/m³Good
Newburg≈ 6 µg/m³Good
Madisonville≈ 6 µg/m³Good
Murray≈ 4 µg/m³Good
Erlanger≈ 6 µg/m³Good
Winchester≈ 4 µg/m³Good
Fern Creek≈ 6 µg/m³Good
Okolona≈ 6 µg/m³Good
Danville≈ 4 µg/m³Good
Burlington≈ 6 µg/m³Good
Shively≈ 6 µg/m³Good
Newport≈ 6 µg/m³Good
Shelbyville≈ 5 µg/m³Good
Highview≈ 6 µg/m³Good

Use this board

SmogRank, most polluted cities in Kentucky, United States, PM2.5, last 24 hours to 2 Oct 2026, 07:00 UTC, smogrank.com/us/region/kentucky.

Download top 10 (PNG)

You're welcome to reuse a single chart, image or figure with this citation and a link. Terms.

Updated 2026-10-02 07:07 UTC. Values are PM2.5 (fine particles), the median of each city's monitors, as the US AQI PM2.5 sub-index.