Since state officials began a more focused monitoring effort six years ago to detect toxic algae blooms in Colorado’s lakes and reservoirs, testing has documented harmful levels of such toxins three times on the Western Slope.
One year after it launched one of the largest lead treatment programs in the United States, Denver Water is slightly ahead of schedule.
State water-quality officials will soon evaluate whether two water-improvement programs in the Gunnison River basin have successfully reduced a chemical that is toxic to endangered fish.
These chemicals are everywhere. They last forever. They’re expensive to get rid of. And many Californians don’t even know they’re drinking them.
As California’s new requirements for forever chemicals kick in, small providers in remote towns struggle to clean up their water.
A developer who disrupts wetlands or streams can offset that impact by buying credits generated from floodplain and ecosystem restoration.
Local groups are keeping a close eye on a marble-mining company that violated the Clean Water Act with a Yule Creek diversion.
Hundreds of scientists call for a comprehensive, effective plan to manage PFAS chemicals to protect public health.
Environmental correspondent Laura Paskus revisits the Gold King Mine spill and the destructive impact of the toxic orange plume that went flowing down the Animas and San Juan rivers five years ago.
Two environmental engineers argue that communities need to upgrade building codes to keep wildfires from causing widespread contamination of drinking water systems.