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EPA Proposes to Approve California Plan for San Joaquin Valley Ozone Standards
November 14, 2025
WASHINGTON, Nov. 14 (TNSFR) -- The U.S. Environmental Protection Agency is proposing to approve a state implementation plan (SIP) submission from the state of California regarding the 1997 ozone national ambient air quality standards (NAAQS) in the San Joaquin Valley. The action determines that California has met the attainment-related contingency measure requirements for the area.

This SIP revision entitled "California Smog Check Contingency Measure State Implementation Plan R . . .

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