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  • Water Reclamation Facilities (WRF)

    The Treatment Division operates and maintains the treatment facilities that receive, treat, and dispose of over 62 million gallons per day (MGD) of sanitary sewage. Two major facilities handle sewage from the metropolitan Tucson area, and five facilities serve remote areas scattered throughout several areas of eastern Pima County.

    Metropolitan Facilities

    Agua Nueva WRF/Jacobs

    Since December 16, 2013, the Regional Wastewater Reclamation Department (RWRD) has been diverting flows from the Roger Road WRF to the Agua Nueva WRF/Jacobs.

    The Agua Nueva WRF/Jacobs is a new state-of-the-art water reclamation facility that will allow Pima County to meet new strict environmental standards for effluent discharges into the Santa Cruz River.

    Tres Ríos WRF

    The Tres Ríos Water Reclamation Facility serves the metropolitan Tucson area and treats approximately 30 million gallons of wastewater per day (MGD). The facility underwent a major upgrade and expansion as part of the Regional Optimization Master Plan. The modernized treatment plant complies with stringent regulatory requirements on effluent nutrient reduction and has a permitted capacity to treat 50 MGD which can meet the projected population needs to the year 2030.

    Tres Ríos operates 24-hours per day, 365 days a year. It is the centralized biosolids treatment location for all of the Pima County treatment facilities. The facility is permitted for A+ reclaimed water through Arizona Department of Environmental Quality (ADEQ).

    Randolph Park WRF

    On December 30, 2014, RWRD temporarily ceased operation of the Randolph Park WRF. Prior to this action, the department informed the Arizona Department of Environmental Quality (ADEQ) of the temporary cessation. The department will continue to notify ADEQ of the facility’s status each year.

    Although the Randolph Park WRF produced a very high-quality reclaimed water, the quality of reclaimed water produced at the Pima County’s new Agua Nueva and upgraded Tres Rios WRFs is also very high. The wastewater that had been treated at the Randolph Park facility is now being treated at the Agua Nueva and Tres Rios WRFs.

    The cessation of operations at the Randolph Park WRF will result in significant operational cost savings. However, in the event the facility is needed in the future, the equipment and fixtures will be left in place after all tanks and other infrastructure at the facility have been cleaned.

    All reclaimed water needs required by the City of Tucson for its reclaimed water system is being supplied by the Agua Nueva WRF.

    Sub-Regional Facilities

    Five outlying facilities serve smaller towns and rural areas of Pima County:
    • Arivaca Junction WRF
    • Avra Valley WRF
    • Corona de Tucson WRF
    • Green Valley WRF
    • Mt. Lemmon WRF

    Passed the Flush...

    Join us on a fascinating and educational tour that focuses on learning about the science and technology behind wastewater treatment as we protect the public health and the environment. Pima County Regional Wastewater Reclamation Department (RWRD) shares this educational resource and valuable assets that have been funded over the years by the citizens of Pima County. Our facility tours are a great way for schools, organizations, or ratepayers to learn about the enormous effort that it takes to provide a wastewater utility to our community. Tours are tailored to fit the specific needs of a school or organization and are available to our customers at no charge.

    All tours are cancelled and we are unable to accept any requests out of an abundance of caution due to the ongoing COVID-19 (Coronavirus) Pandemic.

    To schedule a tour, please fill out the online Tour Request Form; or contact Mary Ann Estrada by phone at (520) 724-6185 or via email at MaryAnn.Estrada@pima.gov.

    Facility Weather Information

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    Wastewater Reclamation

    Agua Nueva WRF/Jacobs
    2947 W. Calle Agua Nueva
    Tucson, AZ 85745

    (520) 222-1900


    Tres Rios WRF
    7101 N. Casa Grande Hwy.
    Tucson, AZ 85743

    (520) 724-6047


    Sub Regional Facilities Admin Office
    4527 W. Walker Rd.
    Tucson, AZ 85743

    (520) 724-6150


    Avra Valley WRF
    10000 W. Snyder Hill Rd.
    Tucson, AZ 85735

    (520) 724-6290


    Corona de Tucson WRF
    1100 W. Sahuarita Rd.
    Corona de Tucson, AZ 85641

    (520) 724-6195


    Green Valley WRF
    2201 N. Old Nogales Hwy.
    Green Valley, AZ 85614

    (520) 724-6196


    Mt. Lemmon WRF
    12633 N. Sabino Canyon Pk.
    Summerhaven, AZ 85619

    (520) 576-1225


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