Polluted parks in peril: The five most air polluted National Parks in the United States
Ayers HG. 1999. Polluted parks in peril: The five most air polluted National Parks in the United States. Appalachian Voices. Boone, NC
Portion of summary follows: "Analysis of 1991-98 air pollution monitoring data from ten US National Parks shows that the fie most polluted parks are, in order: 1) Great Smoky Mountains (Tennessee and North Carolina); 2) Shenandoah (Virginia); 3) Mammoth Cave (Kentucky); Sequoia/Kings Canyon (California); and 5) Acadia (Maine) National Parks. The ranking is based on a combination of three pollutant-related measures for visibility, ozone pollution, and acid precipitation, all measured by National Park Service monitoring stations over the most recent eight years. Thhis time period also represents the first eight years of results following the passage of the Clean air Act Amendments of 1990. With noted exceptions, the analysis shows more serious degradation of air quality including risks to human and environmental health in the eastern US parks."