Denver Water serves 1.5 million people in Denver and its surrounding suburbs. The majority of Denver’s water comes from rivers and streams fed by mountain snowmelt. The South Platte River, Blue River, Williams Fork River and Fraser River watersheds are Denver Water’s primary water sources, but it also uses water from the South Boulder Creek, Ralston Creek and Bear Creek watersheds.

Denver Water serves about a quarter of the state's population but uses less than two percent of all water, treated and untreated, in Colorado.