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

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

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 for tomorrow, Thursday, August 12. Northerly winds are expected to bring smoke from the Northern California and Southern Oregon wildfires into the Bay Area. Smoke is expected to be mostly aloft with intermittent periods of smoke mixing to the surface, particularly at higher elevation locations in the North and East Bay regions.  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. 

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 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 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 extending an air quality advisory for wildfire smoke through tomorrow, Friday, August 13. Northerly winds will continue to bring smoke from the Northern California and Southern Oregon wildfires into the Bay Area. Smoke is expected to be mostly aloft with intermittent periods of smoke mixing to the surface, particularly at higher elevation locations in the North and East Bay regions.  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 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 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 extending an air quality advisory for wildfire smoke through Tuesday, August 24. Smoke from wildfires across California is predicted to continue to impact the Bay Area on Tuesday. 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 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 issuing an air quality advisory for wildfire smoke for Wednesday, September 15. Wildfires across Northern California continue to produce smoke, which is being transported southward towards the Bay Area. As a result, hazy and smoky conditions are predicted on Wednesday, especially for communities in the North Bay. At the surface level, onshore winds are expected to keep air quality 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. 

The Air District is issuing an air quality advisory for wildfire smoke for Wednesday, September 22. Smoke from fires across Southern California is expected to continue to impact the Bay Area, with smoky and hazy skies. Pollution levels are not expected to exceed federal health standards and no Spare the Air Alert is in effect for Wednesday. A Spare the Air Alert remains in effect for today, September 21. 

The Air District is issuing an air quality advisory for wildfire smoke for Monday, October 4. Smoke from wildfires in Southern California is expected to continue impacting the Bay Area on 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 for Monday. A Spare the Air Alert for ozone, or smog, remains in effect for Sunday, October 3.

The Air District is issuing an air quality advisory for wildfire smoke for today, Saturday, May 21. Smoke from the Owens Fire is expected to impact the North Bay, northern East Bay, San Francisco and the Peninsula but pollutant levels are not expected to exceed the national 24-hour standard. A Spare the Air Alert is not in effect.