Air pollution affects many aspects of our environment and economy, but most importantly, our health.
Different air pollutants have different effects on our health, and some people are more at risk. In this section of our web site, we will guide you through some of the most recent information available on the health effects of air pollution. They tell us how much of a substance can be in the air without causing harm, based on proven scientific and medical research. Both the federal and state governments set air quality standards. In most cases, California's air quality standards are more protective of health.