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The Air District has fined Chemtrade West US LLC $160,000 for air quality violations at its sulfuric acid manufacturing plant in Richmond, which is connected to the Chevron Richmond refinery. Chemtrade supplies various chemical products to industry, including sulfuric acid, which is a byproduct of refining crude oil. 

The Air District has settled a case against Chemtrade West US LLC for air pollution violations at its chemical plant in Richmond. Chemtrade will pay $135,000 in civil penalties.    

Localized air quality impacts may occur as Marathon Refinery in Martinez idles operations.

Smoke from wildfires throughout the Bay Area is impacting air quality.  

View current and historical air quality data based on measurements taken from the Air District's air monitoring network.

Get air quality and weather information for the Bay Area.

Learn about the Air District's free air quality widgets and add them to your website.

Learn about the Air District's air monitoring network and activities, including laboratory support, data quality assurance, and pollutant source testing.

Get daily forecasts of air quality and weather factors that affect air pollution potential in the Bay Area.

Frequently Asked Questions - Air Quality

Learn all about air quality in the Bay Area, including air quality and weather forecasts, open burn and spare the air status, wood smoke pollution, and more.

Learn about the Air District's process, methods, and goals for developing air quality management plans for the Bay Area.

Learn about the Air District, our Board of Directors, our leadership, our mission, our history and how you can join us in protecting public health, air quality, and the global climate.

View reports summarizing the air quality and pollutant data collected from the Bay Area's air quality monitoring network each year.

Learn about the Air District's complaint program and investigation process.

View air quality complaints that have been received and investigated by the Air District in the past year.

The Air District announced today that Air Liquide Large Industries, US LP, has agreed to pay $159,000 to settle violations that occurred at its hydrogen plant at the San Francisco Oil Refinery in Rodeo.

These resources can assist practitioners in evaluating air quality and climate impacts during the environmental review process pursuant to CEQA. The tools, data, methodologies, and guidance provided do not represent an exhaustive list and should be used in conjunction with other resources.

Learn about the Wildfire Air Quality Response Program, which was developed by the Air District to help mitigate the effect of wildfires on air quality in the Bay Area.