4800 West 92nd Avenue Westminster, CO 80031

City Government


Water Treatment Facilities

The city has two water treatment facilities that produce drinking water that continually meets or exceeds all state and federal drinking water quality standards. The facilities are designed to remove dissolved and suspended solids, manganese, iron, offensive tastes and odors and pathogenic micro-organisms.

The Semper Water Treatment Facility is capable of treating 44 million gallons per day using conventional filtration technology.

The Northwest Water Treatment Facility is capable of treating up to 15 million gallons per day using state-of-the-art membrane micro-filtration.

Raw Water Supply Sources

  • Standley Lake Outlet Works
  • Standley Lake Farmer’s Highline Canal  Bypass 
Average daily water consumption for the City of Westminster is currently 18 million gallons per day with a peak day of up to 44 million gallons per day.
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