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Advisory
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Air quality is improving following today’s burn, and the Air District continues to monitor smoke across the region. Crews may remain on site tomorrow to extinguish remaining hot spots, but no additional prescribed burning is planned. Wednesday’s Spare the Air Alert is for ozone and is separate from today’s smoke impacts.
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Bawasan ang polusyon sa hangin. Remote na magtrabaho, maglakad, magbisikleta, makipag-carpool, o gumamit ng pampublikong transportasyon. |
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Giảm thiểu ô nhiễm không khí. Làm việc từ xa, đi bộ, đạp xe, đi chung xe hoặc sử dụng phương tiện giao thông công cộng. |
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Reduzca la contaminación atmosférica. Trabaje a distancia, camine, use la bicicleta, comparta el automóvil o use el transporte público. |
Learn about the Air District's regulatory air monitoring network and special air quality studies.
The Air District maintains a comprehensive air quality monitoring network of 29 stations distributed among the nine Bay Area counties.
Various instruments at these stations measure concentrations of pollutants for which health-based ambient air quality standards have been set by the U.S. Environmental Protection Agency and the California Air Resources Board, known as criteria air pollutants. The network also measures concentrations of various pollutants that increase the understanding of the sources of the criteria air pollutants, as well as pollutants designated as Toxic Air Contaminants by the state of California.
This information is used to determine compliance with state and federal air quality standards, prepare air quality forecasts, develop air quality plans, provide information for permit modeling, prepare environmental impact reports, and track air quality trends.
Pollutants measured by the monitoring network include:
Last Updated: 18/06/2026