While most haze pollution does not originate in national parks, it can travel hundreds of miles from its source – coal plants, vehicles and oil and gas operations are the main culprits– harming the air we breathe, and the health of park visitors, wildlife and nearby communities.
In fact, over 98 percent of our more than 400 national parks are plagued by haze pollution. Utilizing a standard EPA calculation method, NPCA has identified polluting sources that are likely affecting Class I national parks and wilderness areas across the country. Here are the worst:
-
Press Release
Yosemite Introduces Scaled Back Reservation System for Summer 2025
"Last year, over 4 million people visited Yosemite, with a more expansive reservation system in place. Smart planning doesn’t mean fewer people, just a better experience for all” -- NPCA…
-
Blog Post
Our National Parks Need Sound Science
The National Park System’s breathtaking landscapes and cultural and historic sites serve as living laboratories for science and discovery that help safeguard our nation’s legacy. Yet today, conservation and research…
-
Blog Post
4 Activities for Connecting Your Family to Nature
Try these fun ways to engage the whole family next time you’re exploring your favorite national park or place in nature.
