SAN FRANCISCO – The U.S. Environmental Protection Agency announced that nine areas in California have met the 1997 national health-based air quality standard for smog, also known as ground-level ozone, within their regulatory deadlines. These areas are: Amador, Butte, Calaveras, Mariposa, Tuolumne, and Ventura counties, as well as portions of Kern, Nevada and Sutter counties View full post on U.S. EPA Air News
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