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. Dillon Reservoir is Denver Water’s largest storage facility and holds nearly 40 percent of Denver’s water.
Denver Water collects readings at stream gauges and reservoirs throughout the system to track streamflow, diversions, snowpack and other water-supply data. The data in the following reports reflect average conditions over the course of 24 hours at the reporting locations. All data are preliminary and subject to revision. For more information, call 303-628-6510 (please direct other general questions to 303-628-6000). The Colorado Division of Water Resource’s Water Talk phone line at 303-831-7135 provides current streamflow information at stream gages located throughout Colorado.
Water Watch Report
The Water Watch Report is a summary of water supply conditions (e.g., reservoir supply, snowpack and precipitation) prepared for Denver’s Board of Water Commissioners. During the winter, the report is updated the Monday before Board meetings, which are normally the second and fourth Wednesdays of the month. During the irrigation season, it is updated weekly.
Daily Raw Water Reports
The daily raw water reports and the daily weather data provide daily streamflow, rainfall and evapotranspiration updates year-round.