The Air District is lifting an air quality advisory for wildfire smoke that was originally scheduled to last through tomorrow, Wednesday, August 27.
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Marin County
Learn about Marin County - its climate, potential air pollution concerns, and current air quality. You can also view upcoming Air District events in Marin County and read about local efforts to improve air quality.
Latest News
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Air District awards $13.3 million to SamTrans toward the installation of new zero-emission bus charging infrastructureAugust 26, 2025
The Air District has announced a $13.3 million grant to the San Mateo County Transit District toward the installation of new high-capacity electric bus charging infrastructure at its San Carlos facility. This SamTrans project will help accelerate the transition of the SamTrans bus fleet to zero-emission technology and improve air quality in communities most affected by air pollution.
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The Air District is extending an air quality advisory due to wildfire smoke from the Pickett Fire through Wednesday, August 27. Smoke from the Pickett Fire in Napa County is expected to impact Napa, Solano and Sonoma counties through Wednesday. Conditions can change rapidly and the amount and location of smoke at ground level is hard to predict. The public can check for real-time smoke pollution levels in their local area with the U.S. EPA’s Fire and Smoke Map. Smoky, hazy skies may be visible, and the smell of smoke is possible.
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The Air District is extending an air quality advisory due to wildfire smoke from the Pickett Fire through Monday, August 25. Smoke from the Pickett Fire in Napa County is expected to impact Napa, Solano and Sonoma counties through Monday. Conditions can change rapidly and the amount and location of smoke at ground level is hard to predict. The public can check for real-time smoke pollution levels in their local area with the U.S. EPA’s Fire and Smoke Map. Smoky, hazy skies may be visible, and the smell of smoke is possible.
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Upcoming Events
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Other News Articles
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8/18/2025 Air District directs Crown Hill Materials to cease operating unpermitted concrete batch plant
August 18, 2025
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8/14/2025 Air District files lawsuit against Acme Fill Corporation for illegal landfill emissions
August 14, 2025
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8/12/2025 Air District issues air quality advisory for wildfire smoke for Tuesday
August 12, 2025
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8/11/2025 Air District reaches agreement with Argent Materials to resolve air quality violations
August 11, 2025
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7/30/2025 Deadline to apply for the Air District’s Clean HEET program extended
July 30, 2025
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7/28/2025 Air District awards $3.5 million in second cycle of James Cary Smith Community Grant Program
July 28, 2025
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7/23/2025 Air District urges Bay Area to proactively prepare for smoke this wildfire season
July 23, 2025
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7/17/2025 Air District and Alameda County District Attorney announce enforcement actions against Radius Recycling, formerly Schnitzer Steel
July 17, 2025
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7/14/2025 Air District lifts air quality advisory for wildfire smoke for Monday
July 14, 2025
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7/12/2025 Air District extends air quality advisory for wildfire smoke through Monday
July 12, 2025
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7/11/2025 Air District extends air quality advisory for wildfire smoke through Saturday
July 11, 2025
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7/10/2025 Air District issues air quality advisory for wildfire smoke for Thursday and Friday
July 10, 2025
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7/2/2025 Air District urges residents to skip the sparklers this Fourth of July
July 2, 2025
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6/23/2025 Air District extends air quality advisory for wildfire smoke through Monday
June 23, 2025
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6/22/2025 Air District issues air quality advisory for wildfire smoke for Sunday
June 22, 2025
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6/18/2025 Air District issues air quality advisory for smoke from Somersville brush fire for Wednesday evening
June 18, 2025
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6/12/2025 Air District increases Vehicle Buy Back Program incentive and expands eligibility effective July 1
June 12, 2025
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6/10/2025 Air District and Chevron reach settlement with enhanced requirements for air monitoring and transparency
June 10, 2025
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6/4/2025 Air District allocates $1.3 million to improve air quality in West Contra Costa County schools
June 4, 2025
Marin County lies south of Sonoma County, bounded by the Pacific Ocean to the west, San Pablo Bay to the east, and the Golden Gate to the south. One Marin County representative sits on the Air District’s Board of Directors.
Climate
The west coast and southern portions of Marin County are often subject to cool marine air and substantial fog. Temperatures in these areas remain steady through the year because of the nearby ocean. The eastern side of Marin County is warmer and has less fog, due in large part to its distance from the ocean. The extra distance from the ocean allows the marine air to be heated before arriving at eastern Marin cities. Prevailing winds throughout the county are generally from the northwest, with wind speeds highest along the west coast. Annual rainfall in the mountains is generally higher than in most parts of the Bay Area, averaging 37 to 49 inches. The majority of rainfall across the county occurs November through March.
Interactive Air Monitoring Stations Map
Air Quality in Marin County
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.
Along the Marin County coast and in southern Marin County, clean air from the Pacific Ocean helps to keep air pollution at a minimum. Elsewhere in Marin, ozone only rarely becomes a concern, but the hilly terrain and colder winter temperatures can trap PM2.5 near the surface, resulting in air quality that exceeds health standards.
Spare the Air Status
Last Updated: 4/21/2017