History of Treatment and Distribution Plants

Denver Water was ahead of its time in the late 1800s when it built its first filtration facility at Kassler. Since then, Denver Water has proudly served customers clean, high-quality water that consistently meets or exceeds all standards set by the state of Colorado and the federal Safe Drinking Water Act.

  • Kassler

    A man stands near the chlorinator at Kassler in this undated photo. Click image to enlarge (ID# 62.114.2248). Kassler Treatment Plant, which used the English slow-sand filter process, was the first of its type west of the Mississippi River.

    The underground infiltration galleries were built in 1890, the filter beds added in 1906 and the reservoir and pump station were built in 1972. A whole town was built around the plant to operate and maintain the facility.

    Now the buildings at the site, located near Chatfield Reservoir, are used as an educational center.

  • Moffat Treatment Plant

    This view of Moffat Treatment Plant's corridor was taken in 1939. Click image to enlarge (ID# 20.30.4369).

    Moffat Treatment Plant treats West Slope water diverted through the Moffat Tunnel and Gross Reservoir for delivery into Denver’s distribution system.

    The plant was built in 1937, but has been expanded and improved throughout the years.

  • Marston Treatment Plant

    This photo of Marston's headhouse and boiler room was taken in 1924. Click image to enlarge (ID# 131.*.9-385). Marston Treatment Plant treats South Platte, Roberts Tunnel and Bear Creek water for distribution throughout the metro service area.

    Marston was built in 1925, but has been expanded and improved throughout the years.

  • Foothills Treatment Plant

    Crews prepare for construction of Foothills. Click image to enlarge (ID# 173.1.1) Foothills Treatment Plant treats water from the South Platte River and the Roberts Tunnel for distribution in the Denver area.

    At 5,880 feet above sea level, the plant is able to deliver treated water to most of the Denver area with gravity, reducing the energy costs of pumping.

    The plant was completed in 1983 and has since been expanded.

  • Recycled Water Treatment Plant and Distribution System

    Denver Water's Recycled Water Treatment Plant is the largest of its kind in Colorado. Click to enlarge image. The Denver Water Recycled Water Treatment Plant treats effluent from Metro Wastewater to a nonpotable standard for industrial and irrigation uses.

    The facility is the largest of its kind in Colorado. The lakes in Washington Park and City Park receive recycled water through the historic City Ditch.

    The plant started operations in 2004.