PFAs are found in some non-stick coatings, including from a firefighting foam used by the Peterson Air Force Base.
Environmental Protection Agency
An Associated Press investigation found there could be more premature deaths, greenhouse gas emissions and other impacts.
The documents may have evidence of residual plutonium contamination and other ongoing environmental dangers.
A new study from the Environmental Protection Agency found fish and other aquatic life in the are are not suffering severe or long-lasting damage.
President Trump has said he will roll back an Obama-era rule that would've matched federal emissions standards with California standards.
The EPA wants to roll back a 2016 Obama-era rule that required energy companies to step up detection and elimination of methane leaks.
New EPA tests show elevated levels of metal affecting the air quality in Pueblo. The results are linked to a smelter that was designated a Superfund site in 2014.
The U.S. Environmental Protection Agency is expected to downgrade the Front Range region's ozone to "serious."
A replacement rule from the Interior Department rescinds mandates for companies to reduce gas pollution.
Congressman Jared Polis asked the federal government to keep Rocky Flats National Wildlife Refuge closed. Fish and Wildlife plans to open the refuge regardless.