Managing Quality from Source to Tap

Denver Water takes its water quality and safety very seriously. Last year we collected more than 35,000 samples and conducted more than 68,000 tests to ensure Denver's water is as clean and safe as possible.

Denver Water vigilantly safeguards its mountain water supplies, and before the water reaches your tap, it’s carefully filtered and treated.

Mountain Water Sources

Denver’s water sources are the South Platte River and its tributaries, the streams that feed Dillon Reservoir, and the creeks and canals above the Fraser River. Denver Water stores its water in five mountain reservoirs: Antero, Eleven Mile Canyon, Cheesman, Dillon and Gross. From these reservoirs, the water is sent to one of three treatment plants in the city through a complex system of streams, canals and pipes.

After treatment, drinking water is fed by gravity and pumps to a system of underground clear-water reservoirs before continuing to your home or business. More than 3,000 miles of pipe carry water to Denver Water customers.