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EPA Issues Final Rule on Ozone Standards

The U.S. Environmental Protection Agency (EPA) has strengthened the National Ambient Air Quality Standards (NAAQS) for ground-level ozone to 70 parts per billion (ppb) from 75 ppb. The Clean Air Act provides states with time to meet the standards. Depending on the severity of their ozone situation, areas would have until between 2020 and 2037 to meet the standards. See EPA’s full release here.

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