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City of Boulder Water Resource Recovery Facility

City of Boulder Water Resource Recovery Facility

The 75th Street Wastewater Treatment Facility pdf is designed to treat more than 25 million gallons of wastewater per day in a 20-hour, multi-stage treatment process.

  • Currently, it treats approximately 15 million gallons per day and discharges a high-quality effluent (treated wastewater) to Boulder Creek.
  • Wastewater is treated using several different treatment processes, including:
    • physical;
    • microbiological;
    • chemical; and
    • biosolids.
  • Treatment includes disinfection of harmful bacteria, viruses and protozoa.
  • Many samples are collected from the effluent discharge to ensure that the discharge is meeting or exceeding the permit that has been issued by the State of Colorado.
  • The City of Boulder is regulated under permit number CO-0024147 issued by the Colorado Department of Public Health and Environment (CDPHE).

The facility essentially recycles used water and returns it to nature by discharging treated wastewater back into Boulder Creek.

During the past four years, the one-megawatt solar photovoltaic system at the Wastewater Treatment Facility has generated more than six million kilowatt-hours of electricity, saving utility ratepayers more than $200,000. The system began generating clean, renewable power in August 2010 and has operated efficiently and reliably ever since, producing about 14 percent of the facility’s annual power needs.

The city's main Water Quality Laboratory and Industrial Pretreatment Program are also located at the Wastewater Treatment Facility.

Wastewater Treatment Facility Informational Brochure pdf

Boulder's Wastewater: Past and Present pdf

Wastewater Treatment Videos