District of Columbia Air Quality
Current AQI at 4 monitors, highest 52 (Moderate) · Measured 10/27/2026, 4:00 AM PT
- Monitors
- 4
- Highest AQI
- 52
- Moderate
- Typical (median)
- 48
- Good
- Above 100
- 0
Monitoring sites in District of Columbia
Worst first. Times are local.
- 52DCNearRoadModerate · Fine particles (PM2.5) · Tue 10/27/2026, 6:00 AM EDT
- 48McMillan ReservoirGood · Fine particles (PM2.5) · Tue 10/27/2026, 6:00 AM EDT
- 45RIVER_TerraceGood · Fine particles (PM2.5) · Tue 10/27/2026, 6:00 AM EDT
- 15TakomaRecGood · Ozone · Tue 10/27/2026, 6:00 AM EDT
By county
Highest current AQI among the county's monitors
What the AQI means
- 0-50Good. Air quality is satisfactory and poses little or no risk.
- 51-100Moderate. Acceptable. A few unusually sensitive people may have symptoms.
- 101-150Unhealthy for Sensitive Groups. People with heart or lung disease, older adults, children and teens should limit long or heavy outdoor exertion.
- 151-200Unhealthy. Everyone may begin to feel effects. Sensitive groups should avoid long or heavy outdoor exertion.
- 201-300Very Unhealthy. Health alert: the risk of health effects is increased for everyone.
- 301-500Hazardous. Health warning of emergency conditions. Everyone is more likely to be affected.
Frequently asked questions
- Where is the air worst in District of Columbia right now?
- DCNearRoad has the highest current reading at AQI 52 (Moderate).
- How often are readings updated?
- Monitors report every hour. We refresh this page with the latest hour from EPA AirNow.
Source: EPA AirNow · Last updated 10/27/2026 · Data are preliminary and subject to change