AirNow API

EPA AirNow API provides air quality index (AQI) observations and forecasts for locations across the United States. Data includes current and historical air quality measurements for pollutants including ozone (O3) and particulate matter (PM2.5 and PM10).

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Base URL: https://www.airnow.gov/
Auth: api_key
Endpoints: 5
Reachable: yes
CORS: unknown
Last checked: 2026-03-14 22:15:28.413508

Links

Homepage: https://www.airnow.gov/
API Base: https://www.airnow.gov/
Documentation:
SDKs:

Topics

ENVIRONMENT, GOVERNMENT

Tutorials

Getting Started with AirNow

Learn how to query air quality data.

Endpoints

Method Path Summary Auth Last Status Latency
GET /aq/forecast/latLong/ Get air quality forecast by latitude/longitude — — —
GET /aq/forecast/zipCode/ Get air quality forecast by ZIP code — — —
GET /aq/observation/latLong/current/ Get current air quality observations by latitude/longitude — — —
GET /aq/observation/latLong/historical/ Get historical air quality observations by latitude/longitude — — —
GET /aq/observation/zipCode/current/ Get current air quality observations by ZIP code — — —