US EPA proposes to retain existing NAAQS for ozone

Green Car Congress
By mmillikinJul 14, 2020, 4:00 am373 pts
The US Environmental Protection Agency (EPA) is proposing to retain, without changes, the existing, more stringent 2015 National Ambient Air Quality Standards (NAAQS) for ozone. The standards, established in 2015, are currently set at 70 parts per billion (ppb), in terms of a 3-year average of the annual…

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