In 2000, the Bay Area Air Quality Management District and the Metropolitan Transportation Commission missed its fourth deadline for attainment of the ozone standards in the region.
In response to this fourth inadequate plan in 30 years, community and environmental groups filed a lawsuit in federal court to force the EPA to reject the latest plan. Lawyers from Earthjustice filed a complaint on behalf of Bayview Community Advocates, Communities for a Better Environment, the Latino Issues Forum, the Sierra Club, the Transportation Solutions Defense and Education Fund, Urban Habitat, and Our Children's Earth Foundation.
In March 2001, the EPA announced that it will require the Bay Area air quality agencies to develop a more aggressive clean air plan. The EPA action will force regional agencies to adopt additional measures to reduce pollution from sources in the Bay Area ranging from refineries and power plants to trucks, buses, and automobiles.