"The Environmental Protection Agency (EPA) on Wednesday proposed baseline water quality standards for tribal waters, which the agency said would protect more than 500,000 people who live on reservations.
According to the agency, most tribes with reservations don’t currently have water quality standards, and the proposal would put these waters in line with others that are regulated by the federal government.
The standards, which would extend to 76,000 miles of rivers and streams and 1.9 million acres of lakes, reservoirs and other surface waters, set maximum pollution levels for the bodies of water."
Source: The Hill, 05/04/2023