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  • Design Standards, Specifications & Details

    The Regional Wastewater Reclamation Department (RWRD) is proposing revisions and requesting approval and adoption, by reference, of the RWRD “Engineering Design Standards 2022” and the “Standard Specifications and Details for Construction 2022”. The proposed changes will incorporate, by reference, the updated Engineering Design Standards and the Standard Specifications and Details for Constructions, thereby further streamlining the processes for sewer improvement plan design, reviews, and construction.

    The Pima County RWRD Standards Committee, comprised of members of the engineering and construction community, and County staff have worked on the revisions as part of their annual work plan. We anticipate implementation of these Standards to go into effect by February 2022. This applies to ALL new submittals proposing modifications or extensions to the public sewers, such as, tentative subdivision plats, development plans, landscaping plans, paving and grading plans, public sanitary sewer connections, and public sanitary sewer extensions.

    If you have any questions or comments, please notify Francisco Galindo, P.E., Sanitary Engineering Manager at or by telephone at (520) 724-6733.

    Please note: Due to COVID restrictions, hard copies are not available through the Pima County Regional Wastewater Reclamation Department. Written comments concerning the proposed revisions to the referenced documents shall be submitted in writing to

    To review the 2022 Engineering Design Standards sections, select from the links below:

    To view the current, approved Standards, select an image below:
    2016 EDS Cover 2016 SSDC Cover 2016 PSFS Document
    EDS 2016 / Redlined Updates SSDC 2016 / Redlined Updates PSFS 2016 / Redlined Updates


    Forms & Downloads

    The following downloads and forms are referenced in either the PCRWRD Engineering Design Standards 2016 (EDS 2016) or the PCRWRD Standards Specifications and Details for Construction 2016 (SSDC 2016):

    Previous Standards

    The previous standards are available through the following links:

    Guidance for Use of DIP

    The following downloads are approved A312G Applications for the use of Polyvinyl Chloride (PVC) in lieu of Ductile Iron Pipe (DIP) when crossing washes, separation from drainage structures, and sewage velocities exceeding 10 fps.

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    Wastewater Reclamation

    Technical Services & Engineering
    201 N. Stone Ave., 3rd Fl.
    Tucson, AZ 85701

    (520) 724-6500

    Field Engineering
    1313 S. Mission Rd.
    Tucson, AZ 85713

    (520) 724-2651

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