Welcome to the State of California 


Air pollutants are chemicals, particles, or biological materials that harm humans, other living things, and the planet.  They come from many sources and may arise from human activities or natural processes.  Air pollutants can cause or contribute to respiratory illness and other health problems.  A number of programs in the California Department of Public Health study air pollution exposure and health impacts in indoor and outdoor air, including workplaces.  This research supports recommendations for health-protective measures and policies. 

Air cleaners

Asthma – General Disease Information



Tobacco (second-hand smoke)

Wildfire smoke

Workplace Hazards


CDPH Programs

California Breathing

Environmental Health Investigations Branch

Indoor Air Quality Program, Environmental Health Laboratory Branch

Occupational Health Branch

Outdoor Air Quality Section, Environmental Health Laboratory Branch


Last modified on: 4/19/2014 9:06 AM