 Clean Air in Our National Parks
Air pollution is among the most serious threats to national parks. Dirty air can darken the horizon and ruin scenic views. It also damages plants, harms fish and other wildlife, and even affects the health of visitors and park staff. Most of the air pollution affecting national parks results from the burning of fossil fuels, especially by coal-fired power plants.
NPCA advocates for new regulations to clean up hundreds of outdated power plants spewing pollution that harms our lungs and parks. We’re also taking steps to protect America’s national parks from ill-conceived proposals to build new coal-fired power plants near the parks.
New Report! Protecting the Air We Breathe
 NPCA, The American Lung Association, and other organizations have developed a Clean Air Agenda for the new administration and congress. The Agenda calls on our elected leaders to clean up coal plant pollution and take other steps necessary to protect public health and restore healthy parks and wild lands. Download the Report >
National Parks harmed by air pollution:
- Joshua Tree National Park has some of the worst air quality of any park, with record high ozone levels. On clear days, visibility is 100 miles, but haze pollution can cut views to 17 miles.
- From 1999-2003, Sequoia & Kings Canyon National Parks recorded 370 days with unhealthy air from ozone pollution. Over half of the Jeffrey and ponderosa pine trees are showing some level of ozone damage.
- Ozone pollution in Rocky Mountain National Park has been higher than in urban Denver. On the haziest days, visibility at Rocky Mountain is approximately 57 miles- half the distance it should be.
- The State of Florida has issued fish-consumption advisories in Everglades National Park due to high mercury levels in largemouth bass and other fish species.
- Scientists at Mammoth Cave National Park have documented elevated levels of mercury in bats, including one species at risk of extinction—the endangered Indiana bat.
- Estimated annual average natural visibility at Acadia National Park is 110 miles. However, air pollution reduces visibility to approximately 33 miles. Scientists measured some of the highest mercury concentrations in this park’s warm-water fish species, such as bass, perch, and pickerel.
- Great Smoky Mountains National Park- our nation's most visited national park, has spectacular overlooks that are severely impaired by haze. Scenic views in the park should extend for more than 100 miles, but air pollution cuts those views to around 25 miles.
- Big Bend National Park has some of the worst visibility of any national park in the West. Scientists believe that mercury and other toxic compounds may be contributing to reproductive failure among peregrine falcons in the park.
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