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Pacific Southwest, Region 9

Serving: Arizona, California, Hawaii, Nevada, Pacific Islands, Tribal Nations

Air Actions, California

Particulate Matter (PM10) Pollution in California's Owens Valley

Actions Taken


Final Rule PM-10 Nonattainment Finding

May 25, 2007: EPA has finalized its March 15, 2007 proposal to find that the Owens Valley area has failed to attain the PM-10 standard.

Proposed PM-10 Nonattainment Finding

March 15, 2007: Owens Valley is classified as a serious PM-10 nonattainment area and had an attainment deadline of December 31, 2006. EPA is proposing to find that the Owens Valley has failed to attain the 24-hour PM-10 standard by the attainment deadline. For more information on EPA's proposed action, please see the documents below or contact Larry Biland (biland.larry@epa.gov) at (415) 947-4132.


Final EPA Approval of the PM-10 Plan for the Owens Valley Nonattainment Area

August 18, 1999: EPA gave final approval to California’s particulate matter (PM-10) State Implementation Plan (SIP) for the Owens Valley to ensure clean and healthful air. EPA also approved the State’s request for a five-year extension, to December 31, 2006, to meet the PM-10 National Ambient Air Quality Standards (NAAQS).

Contact Information

Larry Biland (biland.larry@epa.gov)
Technical Support Office, EPA Region 9
(415) 947-4132

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