A layer of bad air hugs the skyline of downtown Fresno in late July, 2013.
A layer of bad air hugs the skyline of downtown Fresno in late July, 2013. ERIC PAUL ZAMORA Fresno Bee Staff Photo
A layer of bad air hugs the skyline of downtown Fresno in late July, 2013. ERIC PAUL ZAMORA Fresno Bee Staff Photo

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May 04, 2016 4:46 PM

San Joaquin Valley achieves decades-old ozone standard

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