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:
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Blog Post
Why Draining Mojave’s Aquifer is a Really Bad Idea
Pulling water from the Mojave Desert would damage prized national parkland and deepen water insecurity for communities. Here are frequently asked questions about the latest attempt by Cadiz Inc. to…
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Blog Post
Which Presidents Have Created the Most National Monuments?
Presidents from both political parties have used the Antiquities Act to preserve the landscapes and historic places that help tell America's story. Some of these stories are now being threatened…
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Blog Post
Inside the FY26 National Park Service Budget
In January, park advocates across the country celebrated the passage of the fiscal year 2026 funding bill that includes the National Park Service budget. But what does this hard-won funding…
