California Environmental Quality Act

Learn about the California Environmental Quality Act and the Air District’s efforts to reduce local air quality impacts from proposed projects and plans.

CEQA is California's broadest environmental law. It helps guide the Air District in identifying and minimizing air quality impacts of plans and projects within the Bay Area. CEQA requires the Air District to follow a procedure of analysis and public disclosure of proposed projects, and to reduce or eliminate any related environmental impacts. The District prepares CEQA documents for our air quality plans and regulations, and also provides guidance to other public agencies regarding recommended methods to analyze and reduce air quality impacts.

CEQA Guidelines

Learn about the Air District’s California Environmental Quality Act Guidelines, which help agencies evaluate and minimize air quality impacts from proposed projects and plans.

UPDATE: January 16, 2014
On June 2, 2010, the Bay Area Air Quality Management District’s Board of Directors unanimously adopted thresholds of significance to assist in the review of projects under the California Environmental Quality Act. These Thresholds are designed to establish the level at which the District believed air pollution emissions would cause significant environmental impacts under CEQA and were posted on the Air District’s website and included in the Air District's updated CEQA Guidelines (updated May 2012).

On March 5, 2012 the Alameda County Superior Court issued a judgment finding that the Air District had failed to comply with CEQA when it adopted the Thresholds. The court did not determine whether the Thresholds were valid on the merits, but found that the adoption of the Thresholds was a project under CEQA. The court issued a writ of mandate ordering the District to set aside the Thresholds and cease dissemination of them until the Air District had complied with CEQA. The Air District has appealed the Alameda County Superior Court’s decision. The Court of Appeal of the State of California, First Appellate District, reversed the trial court's decision. The Court of Appeal's decision was appealed to the California Supreme Court, which granted limited review, and the matter is currently pending there.

In view of the trial court’s order which remains in place pending final resolution of the case, the Air District is no longer recommending that the Thresholds be used as a generally applicable measure of a project’s significant air quality impacts. Lead agencies will need to determine appropriate air quality thresholds of significance based on substantial evidence in the record. Although lead agencies may rely on the Air District’s updated CEQA Guidelines (updated May 2012) for assistance in calculating air pollution emissions, obtaining information regarding the health impacts of air pollutants, and identifying potential mitigation measures, the Air District has been ordered to set aside the Thresholds and is no longer recommending that these Thresholds be used as a general measure of project’s significant air quality impacts. Lead agencies may continue to rely on the Air District’s 1999 Thresholds of Significance and they may continue to make determinations regarding the significance of an individual project’s air quality impacts based on the substantial evidence in the record for that project.

Various tools and resources are available on this website to assist local jurisdictions in applying the Air District’s CEQA Guidelines.

View the District's 1999 CEQA Guidelines.

CEQA Comment Letters

View letters sent to local cities and counties by the Air District commenting on a project’s air quality analysis.

CEQA Tools

Access tools, resources, and documents that help agencies analyze local, regional and global air quality impacts from proposed projects and plans.

CEQA Meetings and Training

View information about past and upcoming meetings and free training sessions regarding the California Environmental Quality Act.

Community Risk Reduction Plans

View plans developed by the Air District and Bay Area communities to reduce local air quality risks and hazards.

Contact Us

Alison Kirk
Senior Environmental Planner, Planning and Research


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Last Updated: 6/11/2015