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The U.S. AQI does not include recommendations for PM2.5 levels above 500, but levels are sometimes worse (“beyond index”).

The Air District is hosting a community workshop in San Leandro, the first in a series of 10 workshops to be held within the next three months, to begin implementation of state law AB 617 which requires reduction of air pollution in communities with high air pollution burdens. 

Effective July 1, the Air District is expanding the Vehicle Buy Back Program, which takes older, high-polluting vehicles off the road that would otherwise likely remain in operation. The program is increasing the incentive amount to $2,000 per vehicle and including vehicles that are model year 2000 and older.

The Air District is extending the Spare the Air Alert due to wildfire smoke from the Glass Fire in Napa and Sonoma counties through Tuesday, October 6, which bans burning wood, manufactured fire logs or any other solid fuel, both indoors and outdoors. Wildfire smoke combined with high inland temperatures and vehicle exhaust may also cause unhealthy smog, or ozone, accumulation in the Bay Area.

The Air District is extending the Spare the Air Alert due to wildfire smoke from the Glass Fire in Napa and Sonoma counties through Friday, October 2, which bans burning wood, manufactured fire logs or any other solid fuel, both indoors and outdoors. Wildfire smoke combined with high inland temperatures and vehicle exhaust may also cause unhealthy smog, or ozone, accumulation in the Bay Area.

Serves high-risk asthma patients most impacted by traffic air pollution.

The Air District is extending the Spare the Air Alert through Monday, December 26, which bans burning wood, manufactured fire logs or any other solid fuel, both indoors and outdoors. Cold overnight temperatures, stagnant air, patchy dense fog, and a high-pressure system over the region is allowing wood smoke pollution to continue to build up over the region. Concurrently, offshore winds transporting additional pollution from the Central Valley is continuing to cause unhealthy air quality in the Bay Area. 

The Air District is issuing the winter season’s first Spare the Air Alert for tomorrow, Friday, December 15, which bans burning wood, manufactured fire logs or any other solid fuel, both indoors and outdoors. Smoke from increased wood burning combined with light winds and low overnight temperatures is expected to cause unhealthy air quality. High pressure over northern California will act like a lid, trapping smoke at ground level. Offshore winds may also transport air pollution from the Central Valley into the Bay Area. 

The Air District is extending the Spare the Air Alert through Sunday, December 17, which bans burning wood, manufactured fire logs or any other solid fuel, both indoors and outdoors. Smoke from wood burning combined with light winds and low overnight temperatures is expected to continue causing air quality to be unhealthy in the Bay Area. A high-pressure system in place over Northern California will act like a lid, trapping smoke at ground level, and offshore winds are forecast to transport air pollution from the Central Valley into the Bay Area.

The Air District is issuing a Spare the Air Alert for smog on Monday, September 30. Air quality is forecast to be unhealthy. High pressure over northern California is expected to produce offshore winds and hot inland temperatures in the upper-90s to low-100s. High inland temperatures, along with motor vehicle exhaust, will create elevated concentrations of ozone, or smog.

The Air District is extending the Spare the Air Alert for smog through Saturday, July 15. High temperatures are expected to continue creating smoggy conditions.

Learn about incentive programs that reduce the cost of exchanging high-polluting, gasoline- and diesel-powered lawn and garden equipment with electric, battery-powered alternatives.

Air District funding is available to help upgrade or replace older, high-emitting, heavy-duty school buses with newer, alternative fuel or zero-emission school buses.

The Air District is issuing a Spare the Air Alert for today, Sunday, December 8, which bans burning wood, manufactured fire logs or any other solid fuel, both indoors and outdoors. Regional wood burning and easterly winds transporting air pollution into the Bay Area from the Central Valley have contributed to high overnight concentrations of fine particle pollution and unhealthy air quality. Although light northerly winds will bring some improvement later in the afternoon and evening, parts of the Bay Area will still experience unhealthy air quality throughout the day. Breezier northeasterly winds will bring more substantial improvement in air quality for Monday.  

The Air District is issuing the sixth Spare the Air Alert for smog on Wednesday, August 30. Air quality is forecast to be unhealthy. High pressure over the region will continue to produce clear skies, light winds and high inland temperatures across the Bay Area. These conditions, combined with motor vehicle exhaust, will produce unhealthy ozone levels. Smoke impacts from the fires near the California and Oregon border may also contribute to the formation of smog tomorrow.

View the Air District's rule advisories, which help the regulated community maintain compliance with air pollution rules and regulations.

The Air District is announcing the award of a loan guarantee to UCAP Power, a provider of ultracapacitor systems that offer reliable, cost-effective high-power energy storage, to support clean energy in the region. 

Learn about the Air District's CEQA Guidelines, which help agencies evaluate local air quality impacts from proposed projects and plans.

Learn about the Air District's CEQA Guidelines, which help agencies evaluate local air quality impacts from proposed projects and plans.

The Air District is announcing the start of the Spare the Air summer smog season, which runs from May to October in the Bay Area.