Air quality in United States
Air quality in Kentucky today
Updated
Good: average US AQI 34 across 1 city in Kentucky Worst now: Louisville (34); cleanest: Louisville (34).
Live US AQI, PM2.5 and ozone for cities across Kentucky, compared with the United States average.
- Average US AQI
- 34 Good
- United States average
- 60 84 cities
- Most polluted now
- Louisville AQI 34
- Cleanest now
- Louisville AQI 34
- Cities above 100
- 0
Air quality in Kentucky today
Right now the modelled air quality in Kentucky averages a US AQI of 34 (Good) across the 1 city we track. By category: 1 Good (of 1).
That is 26 points cleaner than the United States average of 60, ranking 3 of 27 states from cleanest to most polluted.
Louisville has the worst air at 34 (PM2.5 3.7 µg/m³), and Louisville the cleanest at 34. No tracked city is above 100, so no group needs to change plans.
Kentucky cities by AQI (most polluted first)
| City | US AQI | Category | PM2.5 µg/m³ | PM10 µg/m³ | Ozone µg/m³ |
|---|---|---|---|---|---|
| Louisville | 34 | Good | 3.7 | 4 | 131 |
What the US AQI numbers mean
| US AQI | Category | What it means |
|---|---|---|
| 0-50 | Good | Air quality is satisfactory and poses little or no risk; a good time for outdoor activity. |
| 51-100 | Moderate | Acceptable for most people. Unusually sensitive people should consider shortening long or heavy exertion outdoors. |
| 101-150 | Unhealthy for Sensitive Groups | People with heart or lung disease, older adults, children and teens should cut back on prolonged or heavy exertion outdoors. |
| 151-200 | Unhealthy | Everyone should reduce prolonged or heavy exertion outdoors; sensitive groups should avoid it and keep windows closed. |
| 201-300 | Very Unhealthy | Health alert: everyone should avoid prolonged or heavy exertion outdoors, and sensitive groups should stay indoors. |
| 301-500 | Hazardous | Emergency conditions: everyone should avoid all outdoor physical activity and stay indoors with filtered air if possible. The scale tops out at 500; heavier dust or smoke is shown as 500. |
Modelled by CAMS (Copernicus) via Open-Meteo, refreshed twice a day; read hour by hour from the forecast.
Cities in Kentucky
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Data: Open-Meteo Air Quality API, Copernicus Atmosphere Monitoring Service (CAMS).