EPA – Review of the Ozone National Ambient Air Quality Standards

Based on the Environmental Protection Agency’s (EPA’s) review of the air quality criteria and the national ambient air quality standards (NAAQS) for photochemical oxidants including ozone (O₃), the EPA is proposing to retain the current standards, without revision.

Read more >> https://www.federalregister.gov/documents/2020/08/14/2020-15453/review-of-the-ozone-national-ambient-air-quality-standards