Air Quality Lookup

Check current and historical air quality for any U.S. location

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10 Years of Data

Daily and annual AQI records from 2015-2024, sourced from the EPA Air Quality System.

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Current Conditions

Real-time AQI from AirNow, updated hourly for monitoring stations across the country.

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Trend Analysis

See whether air quality in your area is improving, stable, or getting worse over time.

Browse by State

Alabama Median AQI 41 · 18 counties Alaska Median AQI 18 · 10 counties Arizona Median AQI 45 · 13 counties Arkansas Median AQI 43 · 13 counties California Median AQI 47 · 54 counties Colorado Median AQI 42 · 34 counties Connecticut Median AQI 39 · 8 counties Country Of Mexico Median AQI 62 · 2 counties Delaware Median AQI 41 · 3 counties District Of Columbia Median AQI 45 · 1 counties Florida Median AQI 41 · 39 counties Georgia Median AQI 43 · 32 counties Hawaii Median AQI 22 · 4 counties Idaho Median AQI 32 · 20 counties Illinois Median AQI 43 · 23 counties Indiana Median AQI 40 · 40 counties Iowa Median AQI 41 · 19 counties Kansas Median AQI 39 · 11 counties Kentucky Median AQI 41 · 28 counties Louisiana Median AQI 42 · 22 counties Maine Median AQI 34 · 12 counties Maryland Median AQI 41 · 16 counties Massachusetts Median AQI 37 · 13 counties Michigan Median AQI 38 · 29 counties Minnesota Median AQI 36 · 23 counties Mississippi Median AQI 42 · 11 counties Missouri Median AQI 41 · 21 counties Montana Median AQI 27 · 25 counties Nebraska Median AQI 29 · 13 counties Nevada Median AQI 41 · 9 counties New Hampshire Median AQI 37 · 7 counties New Jersey Median AQI 40 · 16 counties New Mexico Median AQI 37 · 16 counties New York Median AQI 35 · 29 counties North Carolina Median AQI 40 · 45 counties North Dakota Median AQI 35 · 11 counties Ohio Median AQI 42 · 40 counties Oklahoma Median AQI 40 · 35 counties Oregon Median AQI 32 · 24 counties Pennsylvania Median AQI 39 · 40 counties Puerto Rico Median AQI 19 · 12 counties Rhode Island Median AQI 35 · 3 counties South Carolina Median AQI 40 · 20 counties South Dakota Median AQI 36 · 11 counties Tennessee Median AQI 39 · 24 counties Texas Median AQI 42 · 46 counties Utah Median AQI 41 · 17 counties Vermont Median AQI 31 · 4 counties Virgin Islands Median AQI 26 · 3 counties Virginia Median AQI 31 · 36 counties Washington Median AQI 28 · 33 counties West Virginia Median AQI 39 · 15 counties Wisconsin Median AQI 38 · 29 counties Wyoming Median AQI 35 · 20 counties

About This Data

All air quality data comes from the EPA Air Quality System (AQS), the official repository for ambient air quality data in the United States. The Air Quality Index (AQI) measures how clean or polluted the air is and what associated health effects might be a concern. Current conditions are sourced from AirNow.

AQI Scale

0-50: Good
51-100: Moderate
101-150: Unhealthy for Sensitive Groups
151-200: Unhealthy
201-300: Very Unhealthy
301+: Hazardous