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Learn more about Contra Costa County, its climate, air pollution potential, and local efforts to improve air quality.

The Air District is extending an air quality advisory for wildfire smoke through Wednesday, July 27. Winds are forecast to transport smoke from the Oak Fire in Mariposa County into the Bay Area through Wednesday; however, the 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 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 extending the air quality advisory through Tuesday due to smoke from the Mineral Fire in Fresno County and the Hog Fire in Lassen County. Smoke will likely remain aloft resulting in smoky and hazy skies, but PM2.5 is not expected to exceed the national 24-hour standard.

The Air District is issuing an air quality advisory due to smoke from the Crystal Fire in Napa County for today, Wednesday, June 5. Localized smoke impacts are possible near Angwin and may impact the Napa Valley from St. Helena to Calistoga. We will be closely monitoring air quality for smoke impacts from this incident.

The Air District is issuing an air quality advisory for wildfire smoke for Sunday, June 16, due to smoke from the Point Fire in northern Sonoma County.

The Air District is closely monitoring flaring at the Chevron Refinery in Richmond and has issued an air quality advisory as localized smoke impacts are possible near and downwind of the facility, including the Contra Costa County cities of Richmond, San Pablo, Pinole, and Hercules, as well as Solano County. This is based on current meteorological conditions which can change depending on the duration of the flaring. Residents should follow instructions from local health officials.

The Air District is extending the air quality advisory through Monday due to smoke from the Mineral Fire in Fresno County in addition to other new fires in the region.

The Air District is issuing an air quality advisory for wildfire smoke for Tuesday, June 18, due to smoke from the Point Fire in northern Sonoma County. A Spare the Air alert remains in effect for today, Monday, June 17.

The Air District is issuing an air quality advisory for wildfire smoke for today, Tuesday, May 31, and tomorrow, Wednesday, June 1. Smoke from the Old Fire in Napa County is expected to impact the Napa Valley. Isolated pockets of elevated air pollution levels are possible near the fire; 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 in the North Bay through Wednesday. 

The Air District is extending the air quality advisory through Sunday due to smoke from the Mineral Fire that started Monday evening in Fresno County.

The Air District is extending an air quality advisory for wildfire smoke in the Napa Valley through tomorrow, Thursday, June 2. Smoke from the Old Fire in Napa County is expected to impact the Napa Valley. Isolated pockets of elevated air pollution levels are possible near the fire, however, pollution levels are not expected to exceed the national 24-hour standard. A Spare the Air Alert is not in effect. Smoky, hazy skies may be visible and the smell of smoke may be present in the Napa Valley through Thursday. 

The Air District is extending an air quality advisory due to wildfire smoke from the Pickett Fire through tomorrow, August 23. Smoke from the Pickett Fire in Napa County is expected to impact Sonoma, Napa and Solano counties through Saturday. Conditions can change rapidly and the amount and location of smoke at ground level is hard to predict. The public can check for real-time smoke pollution levels in their local area with the U.S. EPA’s Fire and Smoke Map. Smoky, hazy skies may be visible, and the smell of smoke is possible.

The Air District is extending an air quality advisory due to wildfire smoke from the Pickett Fire through Monday, August 25. Smoke from the Pickett Fire in Napa County is expected to impact Napa, Solano and Sonoma counties through Monday. Conditions can change rapidly and the amount and location of smoke at ground level is hard to predict. The public can check for real-time smoke pollution levels in their local area with the U.S. EPA’s Fire and Smoke Map. Smoky, hazy skies may be visible, and the smell of smoke is possible.

The Air District is extending an air quality advisory due to wildfire smoke from the Pickett Fire through Wednesday, August 27. Smoke from the Pickett Fire in Napa County is expected to impact Napa, Solano and Sonoma counties through Wednesday. Conditions can change rapidly and the amount and location of smoke at ground level is hard to predict. The public can check for real-time smoke pollution levels in their local area with the U.S. EPA’s Fire and Smoke Map. Smoky, hazy skies may be visible, and the smell of smoke is possible.

The Air District is issuing an air quality advisory due to wildfire smoke from the Pickett Fire for today, August 21, and tomorrow, August 22. Smoke from the Pickett Fire in Napa County is expected to impact Sonoma, Napa, and Solano counties on Thursday and Friday. Conditions can change rapidly and the amount and location of smoke at ground level is hard to predict. The public can check for real-time smoke pollution levels in their local area with the U.S. EPA’s Fire and Smoke Map. Smoky, hazy skies may be visible, and the smell of smoke is possible.

The Air District is issuing an air quality advisory due to wildfire smoke from the Pickett Fire for today, August 21, and tomorrow, August 22. Smoke from the Pickett Fire in Napa County is expected to impact Sonoma, Napa, and Solano counties on Thursday and Friday. Conditions can change rapidly and the amount and location of smoke at ground level is hard to predict. The public can check for real-time smoke pollution levels in their local area with the U.S. EPA’s Fire and Smoke Map. Smoky, hazy skies may be visible, and the smell of smoke is possible.

The Air District invites written comments on new provisions related to hydrogen sulfide monitoring and quality assurance procedures in revised draft fenceline air monitoring plans for the five Bay Area refineries. Comments must be received by 5 PM Pacific Time on April 20, 2023.

The Air District is issuing an air quality advisory for Sonoma and Marin counties due to wildfire smoke from the Woodside Fire in Sonoma County for Thursday, July 30.

The Air District is extending the air quality advisory through Saturday due to smoke from the Mineral Fire in Fresno County. Smoke will likely remain aloft, resulting in smoky and hazy skies, but PM2.5 is not expected to exceed the national 24-hour standard.