Environmentalists seek more ozone nonattainment areas

February 23, 2018
Environmentalists are urging EPA to increase the number and size of areas the agency designates as being out of attainment with the 2015 ozone national ambient air quality standard (NAAQS) of 70 parts per billion (ppb), which would trigger stricter ozone reduction requirements in those areas. EPA missed an Oct. 1 Clean Air Act deadline to issue designations for all parts of the country, and is facing litigation in federal district and appeals courts to force the agency to complete...


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