THE AIR AROUND US
A clearer view
of what we breathe.
Explore air quality across America. Find local conditions,
follow pollution hotspots, and see what’s ahead.
EPA AIRNOW NETWORKLocal observations.
A national picture.Free public data · No account needed
A national picture.Free public data · No account needed
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America, in the air
730 reporting areas · Highest available pollutant AQI
Each dot is a reporting-area center, not a sensor location. Select a dot for details. Blank areas mean no available report, not clean air.
Good0–50Moderate51–100Unhealthy for Sensitive Groups101–150Unhealthy151–200Very Unhealthy201–300Hazardous301+
KNOW WHAT YOU’RE LOOKING AT
Public data.
Clear context.
AQI is an index, not a concentration
Higher values mean greater air pollution concern. PM2.5, ozone, and PM10 are shown as the AQI reported by the source. Overall AQI is the highest available pollutant reading.
Local coverage varies
AirNow combines federal, state, local, and tribal agency reports. Current observations are preliminary and may change. Use EPA AQS for validated historical or regulatory analysis.
Read about the data ↗