Archives: Resources

Help understanding why different sites show different readings and where to access the most accurate data.

U.S. real-time, local air quality index data.

Air Data website with recent and historical data collected at outdoor monitors across the US.

Daily and hourly data from state-run air quality monitoring sites in California,

Country-wide map of air sensors and reference instruments measuring PM2.5 showing current air quality conditions, wildfires, and smoke plumes.

PurpleAir air quality sensor data and downloads on a global map. Not calibrated.

Clarity Movement’s air quality sensor map, showing real-time readings. Internally calibrated.

Aclima’s hyperlocal climate and health data taken throughout the Bay Area.

Air District’s data hub: What you breathe, who they regulate, what they measure, and how to get involved.

Interactive maps showing air quality forecasts, air quality monitoring data, facilities, and overburdened communities throughout the Bay Area.