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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A Healthy Breathing Environment For Every Bay Area Resident
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Solano County
Learn about Solano County - its climate, potential air pollution concerns, and current air quality. You can also view upcoming Air District events in Solano County and read about local efforts to improve air quality.
Latest News
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Air District issues air quality advisory for Friday and SaturdayOctober 25, 2024
The Air District is issuing an air quality advisory due to smoke for Friday, October 25 and Saturday, October 26. Smoke from prescribed fires near Pescadero may impact air quality along the Peninsula – south of San Francisco and north of San Jose. Conditions can change rapidly and the amount and location of smoke at ground level is hard to predict.
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Air District issues air quality advisory for FridayOctober 18, 2024
The Air District is issuing an air quality advisory due to wildfire smoke from fires around the Bay Area for Friday, October 18. Smoke from wildfires including the Keller Fire in the East Bay may impact air quality in parts of the Bay Area Friday. Conditions can change rapidly and the amount and location of smoke at ground level is hard to predict.
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Air District to host Clean Air Talk in East Palo Alto on November 2October 17, 2024
The Air District will host an in-person conversation with Air District Board Chair Davina Hurt on Saturday, November 2, 2024, from 12 noon – 1 PM at the East Palo Alto Community Room in the East Palo Alto Public Library. The conversation will focus on community questions and concerns regarding air quality issues and climate change.
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October 08, 2024
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Other News Articles
Solano County is bordered by Napa and Yolo counties to the north, Sacramento County to the east, and San Pablo Bay to the south. The Air District only has jurisdiction over the southwestern portion of the county, which includes Vallejo and Fairfield. One Solano County representative sits on the Air District’s Board of Directors.
Climate
During summer and fall months, high pressure offshore, coupled with thermal low pressure in the Central Valley, draws marine air eastward through the Carquinez Strait almost daily. Temperatures along the coast and inland tend to remain moderate. Winter temperatures range from cool overnight to moderate during the day, while summer temperatures range from moderate overnight to warm during the day. Afternoon westerly winds are common in the southern portion of the county, along the Carquinez Strait. Annual rainfall totals range from 13 inches near the coast to 22 inches inland in Fairfield.
Interactive Air Monitoring Stations Map
Air Quality in Solano 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.
In summer, most of Solano County is exposed to prevailing westerly winds through the Carquinez Strait, which mixes and reduces ozone levels by drawing cooler, marine air from the Pacific Ocean and San Pablo Bay eastward. However, when the marine flow is weak or nonexistent, ozone levels may exceed health standards on a few days each year, mainly east of Suisun City.
In Solano County, PM2.5 concentrations can become elevated enough to exceed health standards during the winter when air pollution is transported from the Central Valley due to prevailing easterly winds. Local residential wood burning can also cause elevated particulate levels on cold, calm evenings during winter.
Spare the Air Status
Last Updated: 4/21/2017