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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.  

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 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 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 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 extending an air quality advisory for wildfire smoke through Monday, August 29. Smoke from the Rum Creek Fire in southwest Oregon and the Six Rivers Lightning Complex Fire in northwest California is expected to impact the Bay Area through Monday. Elevated air pollution levels are likely. However, pollution levels are not expected to exceed the national 24-hour standard, and a Spare the Air Alert is not in effect. Smoky, hazy skies will be visible and the smell of smoke is expected to be present within the Bay Area.

The Air District is extending an air quality advisory for wildfire smoke through Tuesday, August 22. 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 Monday and Tuesday, causing air quality to reach 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 issuing an air quality advisory for wildfire smoke for tomorrow, Tuesday, August 23. Smoke from the Six Rivers Lightning Complex Fire in Humboldt and Trinity counties is expected to impact the Bay Area tomorrow. Isolated pockets of elevated air pollution levels are possible; however, pollution levels are not expected to exceed the national 24-hour standard. A Spare the Air Alert is not in effect and air quality is not expected to be unhealthy. Smoky, hazy skies may be visible and the smell of smoke may be present tomorrow. 

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 issuing an air quality advisory for wildfire smoke for tomorrow, Sunday, August 28. Smoke from the Rum Creek Fire in southwest Oregon is expected to impact the Bay Area tomorrow. Isolated pockets of elevated air pollution levels are possible; however, pollution levels are not expected to exceed the national 24-hour standard. A Spare the Air Alert is not in effect and air quality is not expected to be unhealthy. Smoky, hazy skies may be visible and the smell of smoke may be present tomorrow.

The Air District is extending an air quality advisory for wildfire smoke through Wednesday, August 23. Smoke from numerous fires in Northern California is expected to impact air quality throughout the Bay Area on Tuesday and Wednesday, causing air quality to reach 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 Thursday, July 28. Winds are continuing to transport smoke from the Oak Fire in Mariposa County into the Bay Area; however, smoke is expected to remain aloft. Smoky, hazy skies may be visible across the Bay Area and the smell of smoke is possible at higher elevations. Air quality is forecast to be in the good to moderate range on the air quality index and pollutant levels are not expected to exceed the national 24-hour health standard. A Spare the Air Alert is not in effect.

The Air District is issuing an air quality advisory for wildfire smoke for Friday, August 25. Smoke from the Smith River Complex and other fires in Northern California is expected to impact air quality throughout the Bay Area on Friday, 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 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.