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  • Sewerage Capacity Allocation

    Sewerage Capacity Allocation Letter is required prior to a new connection to the sewerage system or change in dischargeable flows made by an existing connection.

    The process leading up to a capacity allocation (Type III) is a progressive review of the sewer system’s availability to manage the new flow being added by a specific development.

    • The Type I (Investigation) request should be submitted in the early stages of development so both the owner and department are aware of the impacts the development may have on the sewer system.
    • The Type II (Availability) request should be submitted prior to the conceptual design phase to verify the status of capacity in the sewer system for the development.
    • The Type III (Allocation) request should be made prior to submitting public sewer improvement plans, or if no public sewer is part of the project, prior to applying for a site/building permit.
    The capacity allocated in a Type III (3) letter only becomes final when the connection conditions are met.


    The request forms below are fillable PDF format, and must be sent via email to: RWRDCapacityResponse@pima.gov
    This email address may also be used for questions about the capacity process.

    Sewer Capacity Allocation:
    Kurt Stemm
    (520) 724-6607
    Escalation & Problem Resolution:
    Lorenzo Hernandez
    (520) 724-6645

    Type I - Investigation Request

    An initial investigation to see if conveyance and treatment capacity are feasible and is required for a zoning or site analysis. Investigation Request instructions.

    Type II - Availability Request

    A request for sewer availability pertaining to Development Plans, Tentative Plat and Site Plans. Availability Request instructions.

    Type III - Allocation Request

    A request for capacity allocation. Allocation Request instructions.

    Table 1. Unit Design Flows

    Table used for determining design flow for sewers

    Application Process Notice, see Regulatory Bill of Rights

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    Wastewater Reclamation

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

    (520) 724-6500

    Development Liaison
    201 N. Stone Ave., 1st Fl.
    Tucson, AZ 85701

    (520) 724-6602

    Field Engineering
    1313 Mission Rd.
    Tucson, AZ 85713

    (520) 724-2651

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