Air quality in United States
Air quality in District of Columbia today
Updated
Moderate: average US AQI 66 across 1 city in District of Columbia Worst now: Washington (66); cleanest: Washington (66).
Live US AQI, PM2.5 and ozone for cities across District of Columbia, compared with the United States average.
- Average US AQI
- 66 Moderate
- United States average
- 49 619 cities
- Most polluted now
- Washington AQI 66
- Cleanest now
- Washington AQI 66
- Cities above 100
- 0
Air quality in District of Columbia today
Right now the modelled air quality in District of Columbia averages a US AQI of 66 (Moderate) across the 1 city we track. By category: 1 Moderate (of 1).
That is 17 points worse than the United States average of 49, ranking 45 of 51 states from cleanest to most polluted.
Washington has the worst air at 66 (PM2.5 17 µg/m³), and Washington the cleanest at 66. No tracked city is above 100, so no group needs to change plans.
District of Columbia cities by AQI (most polluted first)
| City | US AQI | Category | PM2.5 µg/m³ | PM10 µg/m³ | Ozone µg/m³ |
|---|---|---|---|---|---|
| Washington | 66 | Moderate | 16.6 | 21 | 103 |
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 District of Columbia
More
Data: Open-Meteo Air Quality API, Copernicus Atmosphere Monitoring Service (CAMS).