ozone NAAQS

Evolving Air Quality Standards

The standards have gotten tougher. Compliance still lags.

The goal of the Clean Air Act is to achieve national ambient air quality standards (NAAQS), with the primary requirement being protection of public health. As our understanding of the health effects of air pollution has improved, there has been a general trend toward tightening the standards. However, it’s very hard to keep track of …

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