pollution

Health and environmental advocates vow to fight it in court.

The EPA’s rejection of Colorado’s regional haze plan and orders from the Trump administration to keep coal plants online in the state have advocates worried about damage to protected areas.

Yellow snow isn't the only concern when snowmelt is a main drinking water source.

The new ‘dredge-and-fill’ rules address a gap by the U.S. Supreme Court’s Sackett decision two years ago, which drastically shrunk the number of waterways eligible for federal protections.

New research shows that wildfires are a major contributor to ozone pollution, and can significantly exceed the impacts of human-generated emissions.

A new report shows tens of thousands of abandoned mines dot the U.S., including parts of the Mountain West. Experts say these sites pose pollution threats due to being in areas that are at high risk for flooding.

A new study shows climate change is melting glaciers and permafrost in the Mountain West. Researchers say this can trigger the production of toxic mercury in mountain wetlands, posing risks to water supplies and wildlife.

High groundwater, challenging soils and uncertain real estate development bog down Wyoming’s efforts to eliminate a benzene plume.

New research shows high levels of a toxic byproduct linked to cancer and other health problems polluting drinking water across the U.S., including parts of the Mountain West. One of the main causes is manure runoff from livestock farms.

State DEQ investigation confirms resident’s logic and supports need for millions in better treatment.