The Air District will host an in-person conversation with Air District Board Chair Davina Hurt on Saturday, December 7, 2024, from 12 noon – 1 PM at the Greenhouse Community Room in the San Lorenzo Public Library. The conversation will focus on community questions and concerns regarding air quality issues and climate change.
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A Healthy Breathing Environment For Every Bay Area Resident
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Sonoma County
Learn about Sonoma County - its climate, potential air pollution concerns, and current air quality. You can also view upcoming Air District events in Sonoma County and read about local efforts to improve air quality.
Sonoma County lies to the west of Lake and Napa counties, north of Marin County, and south of Mendocino County. The Air District only has jurisdiction over the southern portion of the county, which includes Santa Rosa, Petaluma, and Sonoma. Two Sonoma County representatives sit on the Air District’s Board of Directors.
Latest News
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Air District to represent Bay Area at COP29November 12, 2024
The Air District is sending representatives to attend the United Nations Climate Change Conference, or COP29, in Baku, Azerbaijan from November 11 through November 22. Air District Board of Directors Chair Davina Hurt and Executive Officer Dr. Philip Fine will hold a virtual press conference on Tuesday, November 19 at 10 AM. Bay Area residents are invited to join the discussion, ask questions and share their concerns by connecting with the Air District on Facebook during the livestream press conference.
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Air District releases woodsmoke white paper for public commentNovember 06, 2024
The Air District has released a woodsmoke White Paper for public comment, which provides extensive information on wood burning in the Bay Area, the current state of the regulatory landscape for wood-burning devices, and a discussion of potential recommendations to further minimize woodsmoke emissions and exposures.
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Air District and CARB fine Valero Refining Co. $82 million for air quality violationsOctober 31, 2024
The Air District and the California Air Resources Board are announcing a nearly $82 million penalty in a joint case to address significant air pollution violations by Valero Refining Co. at its Benicia refinery. This penalty is the largest ever assessed in the Air District’s history.
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October 25, 2024
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October 18, 2024
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October 17, 2024
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Upcoming Events
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Other News Articles
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10/17/2024 Air District fines Radius Recycling, formerly Schnitzer Steel, $575,000 for air quality violations
October 17, 2024
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10/8/2024 Air District issues air quality advisory for Novato
October 8, 2024
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10/8/2024 Air District to host Building Appliance Rules learning session on October 22
October 8, 2024
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10/7/2024 Air District to host public meeting on Radius Recycling permit application
October 7, 2024
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10/7/2024 Air District’s James Cary Smith Community Grant Program uplifts Bay Area communities
October 7, 2024
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10/5/2024 Air District extends Spare the Air Alert through Sunday
October 5, 2024
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10/4/2024 Air District issues Spare the Air Alert for Saturday
October 4, 2024
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10/2/2024 Air District extends Spare the Air Alert through Thursday
October 2, 2024
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10/2/2024 Air District fines Marathon Martinez Refinery $5 million
October 2, 2024
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10/2/2024 Air District releases annual Air Toxics Report and online Facility Toxic Emissions and Prioritization Tool
October 2, 2024
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10/1/2024 Air District extends Spare the Air Alert through Wednesday
October 1, 2024
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10/1/2024 Regional Agencies Mark Milestone in the Mandatory Bay Area Commuter Benefits Program
October 1, 2024
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10/1/2024 Air District offers $90 million in grants to reduce toxic air pollution from heavy-duty diesel engines
October 1, 2024
Climate
Sonoma County’s climate is largely affected by the topography of the Petaluma, Cotati, and Sonoma valleys. Temperatures are similar in the Petaluma and Cotati valleys, while Sonoma Valley temperatures are warmer, similar to Napa Valley. Average daily temperatures range from moderate overnight to hot during the day in the summer, and cool overnight to moderate during the day in the winter. Wind patterns in the Petaluma and Cotati valleys are strongly influenced by the Petaluma Gap, with calm to mild winds typical in both Santa Rosa and Petaluma. During late afternoons in summer, fog is common in the Petaluma and Cotati valleys, and can persist until late morning the following day. Sunshine in the Sonoma Valley is plentiful. Annual rainfall ranges from 24 inches in Petaluma, 29 inches in Sonoma, and 30 inches in Santa Rosa.
Interactive Air Monitoring Stations Map
Air Quality in Sonoma 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.
Although much of the interior of Sonoma County can get quite hot during summer, air monitoring results show that this area experiences some of the lowest ozone levels in the entire Bay Area. Gaps in the hills to the west allow fresh marine air inland on all but the hottest summer days.
PM2.5 can become elevated, particularly due to wood burning during the holiday season, but once again, air monitoring results show that this region has some of the lowest levels of PM2.5 in the entire Bay Area.
Spare the Air Status
Last Updated: 4/21/2017