Colorado’s lakes serve as a needed respite during sweltering summer days, but as the days become warmer the state’s lakes are becoming more susceptible to toxic blooms of algae.

A new round of samples shows the Colorado River "positive" overall for zebra mussels, as state officials scramble to contain ...

Colorado's mountain streams are facing a "real challenge" from a ... Iron oxides stain a bed of the Upper East Mancos River in southwestern Colorado, ... said in a statement. "Some are quite toxic.

Colorado Parks and Wildlife (CPW) confirmed that the Colorado River has tested positive for Zebra mussels. CPW said that they have found Zebra mussel veligers— a microscopic larval stage of the ...

Toxic metals found in snowpack of Rocky Mountains, study shows ... Snowy portions of the Colorado River at its headwaters within Rocky Mountain National Park in Estes Park, ...

In the 1963 Supreme Court case Arizona vs. California, which settled a dispute over Colorado River water, ... In Hopi communities, many people have tap water contaminated with toxic arsenic.

One of the nation’s oldest environmental groups is suing Imperial County’s powerful water agency over a recent deal meant to help conserve the parched Colorado River.

Millions of dollars in federal funding has been released to continue restoring lands and streams in the fire-scarred Upper ...

Last month, California’s water districts committed to conserving an additional 400,000 acre-feet of water in Lake Mead each year from 2023 to 2026, and according to the Colorado River Board of ...