A new study finds U.S. irrigation may prevent far more greenhouse gas emissions by reducing the need to convert natural lands to farms.

A 4.2-million-gallon sewage spill in Colorado's Arkansas River raises concerns for farmers as water testing and monitoring continue.

A federal appeals court reversed a ruling that blocked Denver Water from filling the expanded Gross Reservoir northwest of Boulder.

Federal and state officials will meet in October to discuss Army Corps water authorities, Western water rights and committee bylaws.

Study finds severe droughts cut Upper Colorado River flows, raised water temperatures and increased salinity, with some effects lasting years.