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

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 air monitoring network and activities, including laboratory support, data quality assurance, and pollutant source testing.

Get air quality and weather information for the Bay Area.

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

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's free air quality widgets and add them to your website.

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 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.

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.

The Air District is issuing an air quality advisory for wildfire smoke through Wednesday, September 20. Smoke from fires in Northern California and Oregon is expected to impact air quality throughout the Bay Area area, causing air quality to reach high-moderate on the U.S. EPA’s Air Quality Index. Smoky, hazy skies may be visible and the smell of smoke is possible. Pollutant levels are NOT expected to exceed the national 24-hour health standard and there is no Spare the Air Alert in effect.

The Air District is extending an air quality advisory for wildfire smoke through Friday, August 20. Smoke from the Northern California wildfires is expected to continue to impact the Bay Area on Thursday and Friday. Light northerly winds will continue to transport smoke toward the Bay Area. Smoke impacts are forecast to be more widespread than last week. Air quality is expected to be in the mid to high-moderate range and not exceed the federal health standard, so no Spare the Air Alert is in effect. However, smoke may mix to the surface at times causing intermittent and isolated pockets of elevated pollution levels.

The Air District is issuing an air quality advisory for wildfire smoke for Wednesday, August 18. Smoke from the Northern California wildfires is expected to again impact the Bay Area on Wednesday. Onshore winds are expected to shift to strong north/northeast winds in the Sacramento Valley, pushing smoke into the Bay Area. Smoke impacts are forecast to be more widespread than last week. Air quality is expected to be in the mid to high-moderate range and not exceed the federal health standard, so no Spare the Air Alert is in effect. 

The Air District is extending an air quality advisory for wildfire smoke through Monday, August 21. Smoke from numerous fires in Northern California and the Plant Fire in Southern California is expected to impact air quality throughout the Bay Area on Sunday and Monday, causing air quality to reach low-moderate on the U.S. EPA’s Air Quality Index. Smoky, hazy skies may be visible and the smell of smoke is possible. Pollutant levels are NOT expected to exceed the national 24-hour health standard and there is no Spare the Air Alert in effect.

The Air District is extending an air quality advisory for wildfire smoke through Monday, August 16. Smoke from Northern California and Southern Oregon wildfires continues to impact the Bay Area. Smoke is expected to be mostly aloft with intermittent periods of smoke mixing to the surface, particularly at higher altitude locations in the North and East Bay mountains and coastal regions down towards the Santa Cruz Mountains. Air quality is not expected to exceed the federal health standard and therefore, no Spare the Air Alert is in effect. 

The Air District is extending an air quality advisory for wildfire smoke through Sunday, August 15. Smoke from Northern California and Southern Oregon wildfires is expected to continue to impact the Bay Area over the weekend. Smoke is expected to be mostly aloft with intermittent periods of smoke mixing to the surface, particularly at higher elevation locations in the North Bay Mountains, East Bay Hills, Diablo Range, and Coastal Hills. Air quality is not expected to exceed the federal health standard and therefore, no Spare the Air Alert is in effect.