Monitor Your Local Air Quality
Current AQI from EPA AirNow official monitoring stations — the same data the EPA publishes — plus your EPA radon zone classification for indoor air risk.
Get Started FreeEPA AirNow — Official AQI
Air quality index pulled directly from EPA AirNow — the federal network of 2,000+ certified monitoring stations across the US. Updated hourly.
Radon Zone Classification
Your county's EPA Map of Radon Zones classification (Zone 1 = high, Zone 2 = moderate, Zone 3 = low) for indoor radon exposure awareness.
Health-Based Guidance
AQI categories (Good → Hazardous) with specific recommendations for sensitive groups, outdoor activity, and ventilation.
How It Works
Enter Your ZIP Code
Your ZIP code queries the nearest EPA AirNow monitoring station. For counties with no ZIP coverage, Census TIGERWeb provides the county centroid for lat/lng lookup.
AQI + Radon Returned
Current AQI and pollutant category from EPA AirNow, plus your state's EPA radon zone from the static federal dataset.
Cached & Provenance-Stamped
Results are cached with source attribution so you always know whether AQI is from a nearby station or a centroid fallback.
Trusted Data Sources
Related Tools
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