Air quality now
Hourly Air Quality Index from 2,521 official monitor readings via EPA AirNow, latest hour .
Data: reporting agencies via U.S. EPA AirNow · updated 5 min ago ()
0–50 Good 51–100 Moderate 101–150 Unhealthy for Sensitive Groups 151–200 Unhealthy 201–300 Very Unhealthy 301+ Hazardous
Highest readings in the US right now
| Reporting agency | Station | Pollutant | AQI |
|---|---|---|---|
| Northern Sierra AQMD | Portola | PM2.5 | 126 Unhealthy for Sensitive Groups |
| San Joaquin Valley Unified APCD | Manteca | PM2.5 | 122 Unhealthy for Sensitive Groups |
| California Air Resources Board | Stockton - University Park | PM2.5 | 112 Unhealthy for Sensitive Groups |
| Kansas Dept. of Health and Environment | WY/KC | PM2.5 | 110 Unhealthy for Sensitive Groups |
| Idaho Department of Environmental Quality | Pinehurst | PM2.5 | 98 Moderate |
| California Air Resources Board | Bakersfield - California Ave | PM2.5 | 96 Moderate |
| Oregon Dept. of Environmental Quality | Coos Bay Marshfield HS | PM2.5 | 94 Moderate |
| San Joaquin Valley Unified APCD | Fresno-Foundry Park | PM2.5 | 94 Moderate |
| San Joaquin Valley Unified APCD | Bakersfield - Golden State Highway | PM2.5 | 94 Moderate |
| Bay Area Air District | Livermore-Portola | PM2.5 | 93 Moderate |
| Sacramento Metro. AQMD | Arden Arcade - Del Paso Manor | PM2.5 | 92 Moderate |
| California Air Resources Board | Visalia - W Ashland Avenue | PM2.5 | 91 Moderate |
| Sacramento Metro. AQMD | Bercut Dr | PM2.5 | 87 Moderate |
| Oregon Dept. of Environmental Quality | Klamath Falls - Peterson School | PM2.5 | 86 Moderate |
| San Joaquin Valley Unified APCD | Merced-M St | PM2.5 | 86 Moderate |
| San Joaquin Valley Unified APCD | Hanford - S. Irwin Street | PM2.5 | 86 Moderate |
| Oregon Dept. of Environmental Quality | Burns - Washington St. | PM2.5 | 84 Moderate |
| South Coast AQMD | Reseda | PM2.5 | 84 Moderate |
| Northern Sierra AQMD | Quincy | PM2.5 | 83 Moderate |
| San Joaquin Valley Unified APCD | Fresno-Pacific | PM2.5 | 82 Moderate |
Air quality data: Northern Sierra AQMD, San Joaquin Valley Unified APCD, California Air Resources Board, Kansas Dept. of Health and Environment, Idaho Department of Environmental Quality, Oregon Dept. of Environmental Quality, Bay Area Air District, Sacramento Metro. AQMD, South Coast AQMD. Distributed by the U.S. EPA AirNow program. Preliminary data, not validated: readings may change after quality checks by the reporting agencies. Values and colors are shown as reported.
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The number next to a city is the highest current AQI among official monitors within 40 km (25 mi) of the city center.
Air quality data: New Jersey Dept. of Environmental Protection, New York Dept. of Environmental Conservation, South Coast AQMD, Illinois EPA, Indiana Dept. of Environmental Management, Texas Commission on Environmental Quality, Maricopa County Air Quality Department, Arizona Department of Environmental Quality, Salt River Pima-Maricopa Indian Community, Philadelphia Air Management Services, Pennsylvania Dept. of Environmental Protection, Delaware Dept. of Natural Resources and Environment and 75 other agencies. Distributed by the U.S. EPA AirNow program. Preliminary data, not validated: readings may change after quality checks by the reporting agencies. Values and colors are shown as reported.
About this data
Readings are hourly Air Quality Index values from official monitoring stations run by state, local and tribal air agencies, distributed by the U.S. EPA AirNow program. We check for new readings every 15 minutes and show each station's value for PM2.5, PM10 and ozone as reported, without averaging or adjustment. The data is preliminary and not validated: agencies may change readings after quality checks, so it is not used here for trends or long-term comparisons. For official forecasts and the latest readings, see AirNow.gov. AQI categories and colors are the EPA's.
Live Earth Watch is not an official warning service. We show data published by government agencies; for warnings and instructions follow your local emergency officials and the National Weather Service.