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City of Boulder Water Resource Recovery Facility

City of Boulder Water Resource Recovery Facility

The Boulder Water Resource Recovery Facility pdf is designed to treat more than 25 million gallons of wastewater per day in a 20-hour, multi-stage treatment process.

  • Currently, approximately 13 million gallons of wastewater is treated per day and a high-quality effluent (treated wastewater) is returned to Boulder Creek.
  • Wastewater is treated using several different treatment processes, including:
    • physical;
    • microbiological; and
    • chemical;
  • Treatment includes disinfection of harmful bacteria, viruses and protozoa.
  • Many samples are collected and analyzed to ensure that the final 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. Class B biosolids are produced following solids treatment, which are land applied on agricultural fields as part of a beneficial reuse program. Biogas generated during solids treatment is captured and used beneficially, as well. 

During the past nine years, the one-megawatt solar photovoltaic system at the Water Resource Recovery Facility has generated more than 13 million kilowatt-hours of electricity, saving utility ratepayers more than $500,000. 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, Industrial Pretreatment Program, and Stormwater Program are also located at the Water Resource Recovery Facility. 

Water Resource Recovery Facility Informational Brochure pdf

Boulder's Wastewater: Past and Present pdf

Inside Boulder Video from 2014, following the September 2013 Flood Event