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Frequently Asked Questions - Air Quality

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

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

Smoke from wildfires throughout the Bay Area is impacting 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 free air quality widgets and add them to your website.

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

Get air quality and weather information for the Bay Area.

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

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

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.

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.

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.

The Air District is issuing an air quality advisory for wildfire smoke for Saturday, August 21. Smoke from wildfires in Washington, Oregon and Northern California, that moved offshore over the past couple of days, will continue to impact the Bay Area on Saturday. Lingering, lofted smoke over the Bay Area will cause hazy and smoky skies but pollution levels are not expected to exceed federal health standards. Air quality is expected to be in the good to low-moderate range on the Air Quality Index, so no Spare the Air Alert is in effect for Saturday. A Spare the Air Alert remains in effect for today, Friday, August 20. 

The Air District is issuing an air quality advisory for wildfire smoke for Monday, August 23. Smoke from wildfires in Northern California is predicted to impact the Bay Area on Monday. Lofted smoke is expected to cause hazy and smoky skies but pollution levels are not expected to exceed federal health standards and no Spare the Air Alert is in effect. Air quality is expected to be in the good to moderate range on the Air Quality Index. 

The Air District is issuing an air quality advisory for wildfire smoke for Monday, August 30. Pollution levels are not expected to exceed federal health standards and no Spare the Air Alert is in effect.

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 Thursday, September 16. Wildfires across Northern California continue to produce smoke, which is being transported towards the Bay Area. As a result, hazy and smoky conditions are predicted through Thursday. Smoke is forecast to stay mostly aloft, and air quality is expected to be in the moderate AQI category. Pollution levels are not expected to exceed federal health standards and no Spare the Air Alert is in effect. 

The Air District is extending the current air quality advisory for wildfire smoke through Monday, September 27. An air quality advisory is currently in place for Saturday, September 25. Smoke from fires in Southern and Central California is expected to continue to impact the Bay Area through Monday with smoky and hazy skies. Pollution levels are not expected to exceed federal health standards and no Spare the Air Alert is in effect.