The Air District will be holding a virtual webinar on April 10 from 6 -7 PM to provide an overview of the proposed budget for fiscal year (FY) 2025-2026 and proposed fee regulation amendments.
Learn about San Francisco County - its climate, potential air pollution concerns, and current air quality. You can also view upcoming Air District events in San Francisco County and read about local efforts to improve air quality.
The Air District will be holding a virtual webinar on April 10 from 6 -7 PM to provide an overview of the proposed budget for fiscal year (FY) 2025-2026 and proposed fee regulation amendments.
The Air District has confirmed the source of the odor to be the West Contra Costa County Landfill's compost operation.
The Air District is preparing to distribute over $124 million in funding to support local communities overburdened by air pollution — and we need your input! This funding comes from penalties collected from industry and businesses that violate Air District regulations. Your feedback will help shape how these funds are used to reduce air pollution and improve health outcomes in your community.
Join us for a unique opportunity to engage with Air District executives and learn about career opportunities and pathways within the organization!
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San Francisco County rests at the northern end of the San Francisco Peninsula, bounded by San Mateo County in the south, the Pacific Ocean to the west, San Francisco Bay to the east, and the Golden Gate Bridge to the north. Three San Francisco County representatives sit on the Air District’s Board of Directors.
Because most of San Francisco's landscape is below 200 feet, the marine layer flows across most of the city, creating a cool and windy climate. The southeastern portion of the county, however, tends to be warmer and sunnier, with fewer foggy days. In the winter, average daily temperatures are mild overnight and moderate during the day, while summertime temperatures tend to remain moderate throughout the season. The highest wind speeds are focused along the western coast and generally mild throughout the county. Rainfall averages about 20 inches per year, with the highest amounts reported on the western coast.
Interactive Air Monitoring Stations Map
Ozone and fine particle pollution, or PM2.5, are the major regional air pollutants of concern in the San Francisco Bay Area. Ozone is primarily a problem in the summer, and fine particle pollution in the winter.
In San Francisco, ozone almost never exceeds health standards and PM2.5 only exceeds the national standard once or twice each year, generally. Being surrounded by water on three sides keeps temperatures within a narrow range, whereby winter low temperatures rarely reach freezing and summer high temperatures stay well below levels where ozone would form and become unhealthy.
Last Updated: 4/21/2017