AirNow (US EPA)
U.S. real-time, local air quality index data.
Air Data: Air Quality Data Collected at Outdoor Monitors Across the US (EPA)
Air Data website with recent and historical data collected at outdoor monitors across the US.
Air Quality and Meteorology Information System (AQMIS) (CARB)
Daily and hourly data from state-run air quality monitoring sites in California,
Fire and Smoke Map v3.0 (US EPA)
Country-wide map of air sensors and reference instruments measuring PM2.5 showing current air quality conditions, wildfires, and smoke plumes.
PurpleAir
PurpleAir air quality sensor data and downloads on a global map. Not calibrated.
Clarity OpenMap
Clarity Movement’s air quality sensor map, showing real-time readings. Internally calibrated.
Aclima
Aclima’s hyperlocal climate and health data taken throughout the Bay Area.
Public Data Center (BAAQMD)
Air District’s data hub: What you breathe, who they regulate, what they measure, and how to get involved.
Interactive Facilities Map (BAAQMD)
Interactive maps showing air quality forecasts, air quality monitoring data, facilities, and overburdened communities throughout the Bay Area.
CARB Pollution Mapping Tool (CARB)
Mapping tool to look at sources, and analyze emissions of greenhouse gases, criteria air pollutants, and air toxics from facilities around California.