Regulation & law · 26/09/1996Updated: 10/18/2026 · 1 min read
EPA Announces Puget Sound Attainment of Ozone NAAQS
Summary
The Environmental Protection Agency (EPA) has determined that the Puget Sound region in Washington state has met the public health-based National Ambient Air Quality Standard (NAAQS) for ozone, based on three years of air quality monitoring data from 1991 to 1993.