Every year, the Air District publishes a table summarizing the air pollution data we collect from our Bay Area air quality monitoring network.
Our monitoring stations sample the ambient air at various locations in the Bay Area. At each station, we take readings of the levels of the major air pollutants for which health-based exposure limits have been set by the EPA and the State of California.
The pollution summary tables show the number of times each year that each station records pollutant concentrations in excess of the federal or California air quality standards. The tables also list the highest annual reading for each pollutant at each station.