The U.S. Environmental Protection Agency announced that nine areas in California have met the 1997 national health-based air quality standard for smog, also known as ground-level ozone, within their regulatory deadlines. These areas are: Amador, Butte, Calaveras, Mariposa, Tuolumne, and Ventura counties, as well as portions of Kern, Nevada and Sutter counties.
Gretchen Bennett, Executive Director, Northern Sierra Air Quality Management District, elaborates.*
EPA’s determinations are based on air quality data collected from state and local monitors that detect air pollutants throughout the state.
Bennett attributes Nevada County’s success to several factors*
While the Federal Register notice does not address the most recent 2008 national ozone standard, Amador, Sutter, and Tuolumne counties have attained that standard as well.
For more information on ground-level ozone and the national standards, visit: http://www.epa.gov/airquality/ozonepollution/.
For more information on the Clean Air Act, visit: http://www.epa.gov/air/caa/.