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  • Rainwater Harvesting Rebate

    PROGRAM GUIDELINES FOR COMMERCIAL USE
    RAINWATER HARVESTING REBATE

    General Purpose
    The City of Amarillo Water Utility Department offers a financial incentive to encourage the use of rainwater as a supplement to municipal water for irrigation use.   The Financial incentive will be in the form of a one-time credit on your City of Amarillo utility bill.   Each application will be evaluated on a first come, first served basis.  Due to budget limitations, all requests may not be funded.

    Rain Barrel Harvesting:

    • Applicant must receive 100% of its potable water from the Amarillo Water Utility.
    • The rain barrel must have a capacity of at least 45 gallons.
    • Galvanized tanks are NOT eligible due to their short lifespan.
    • Residents must provide proof of purchase in the form of an invoice or sales receipt, or a receipt from the installer.
    • Residents must provide a photograph of the installed rain barrel(s) at the residence.
    • Residents must submit a completed Rain Barrel Rebate Application to the City of Amarillo no later than 120 days from purchase or installation.
    • Applications can be obtained by calling 378-3075 or by visiting our website at water.amarillo.gov

    Onetime Utility Bill Credit:

    • Residents will receive a credit of half the cost up to $20 on the City of Amarillo Utility bill for a one barrel installation.
    • Residents will receive a credit of half the cost up to $40 on the City of Amarillo Utility bill for a two barrel or more installation.
    • Please allow two billing cycles after a successful application for bill credit.

    Large System Water Harvesting:

    • Applicant must receive 100% of its potable water from the Amarillo Water Utility.
    • Life expectancy of the system should be a minimum of 10 years.
    • Galvanized tanks are NOT eligible due to their short lifespan.  However, metal tanks with liners may be approved on a case-by-case basis; tank specifications must be submitted.
    • Tanks that are not UV resistant must be painted or enclosed.
    • The applicant agrees to have the system inspected by City staff, photographed, and the use of the photograph in promotional materials.

    The table on the following pages can be used to calculate the optimum tank size for each site.  The “Texas Manuel on Rainwater Harvesting” booklet offers additional guidance and information.  You can obtain a copy through the Texas Water Development Board at their website:
    www.twdb.state.tx.us/publications/reports/RainwaterHarvestingManual_3rdedition.pdf

    Or contact the Texas Water Development Board at:

    Texas Water Development Board 
    1700 North Congress Avenue
    P.O. Box 13231
    Austin, Texas 78711-3231
    phone: (512) 463-7847

    Onetime Utility Bill Credit:

    Successful applicants will receive a credit on their City of Amarillo utility bill.  Credits are for
    a minimum of $45 for a 300 gallon system up to a maximum of $500 based on a combination of 15 cents per gallon of tank storage capacity plus half of the cost of specific components (pad materials up to $100, pump, pump switch up to $100, and first flush parts up to $35) for a complete, operational system.  You may use gravity or pumps for distribution.  The pump cost may include the cost of an in-tank level (float) switch to shut off the pump when the water in the tank falls below a certain level.  Proposed rainwater projects cannot to be used for potable water systems, nor can they be connected to the potable water supply system.  All applicable building codes must be followed.  Call (806) 378-3075 with any application questions. 

    To Apply:

    1. Submit each of the following:
      • Application Form with:
      • Site Plan - Layout of buildings, streets, fences, gates and proposed tank location(s).
      • System Drawing - Sketch of the proposed system including all design calculations, and how the water will travel from the roof to the tank to the landscape area.
      • Operation Guide and Maintenance – Written description of how the system will function and how maintenance will be performed.

      Submit your application packet to:
      Email:  amarillowatercon@amarillo.gov
      Fax:  (806) 378-3026
      Mail:  Water Conservation—Rainwater Harvesting
      P. O. Box 1971
      Amarillo, TX 79105

    2. We will contact you either by mail, phone call or email regarding the approval of your plan from City staff.
    3. All qualifying receipts.
    4. We will contact you for a final inspection.  Please allow two billing cycles after final inspection for bill credit.

    DETERMINING TANK SIZE

    The following table provides the number of gallons that could be harvested for a given roof size and a given rainfall depth (assuming 100% runoff).

    Inches Of Rainfall

     

    1/4"

    1/2"

    3/4"

    1"

    1-1/4"

    1-1/2"

    1-3/4"

    2"

    500

    78

    156

    234

    312

    390

    468

    546

    624

    156

    312

    468

    624

    780

    936

    1,092

    1,248

    234

    468

    702

    936

    1,170

    1,403

    1,637

    1,871

    312

    624

    936

    1,248

    1,559

    1,871

    2,183

    2,495

    390

    780

    1,170

    1,559

    1,949

    2,339

    2,729

    3,119

    468

    936

    1,403

    1,871

    2,339

    2,807

    3,275

    3,743

    546

    1,092

    1,637

    2,183

    2,729

    3,275

    3,821

    4,366

    624

    1,248

    1,871

    2,495

    3,119

    3,743

    4,366

    4,990

    702

    1,403

    2,105

    2,807

    3,509

    4,210

    4,912

    5,614

    780

    1,559

    2,339

    3,119

    3,899

    4,678

    5,458

    6,238

    1,000

    1,500

    2,000

    2,500

    3,000

    3,500

    4,000

    4,500

    5,000

    Assume that a hybrid Bermuda grass such as Celebration, Pioneer, Tifton 10 or Sahara NuMex lawn requires one (1) inch of water per week or about 615 gallons per 1,000 sq. ft. using conventional spray irrigation.  During the 20 week peak-water-use period, from May to September, the landscape would require approximately 12,000 gallons (615 gallons per week X 20 weeks = 12,308 gallons) of water per 1,000 sq. ft.  On average, about 8,000 gallons per sq. ft. of that is provided by summer rainfall.  Thus, the remaining 4,000 gallons could be provided by stored rainwater.  Keep in mind that less water may be needed if alternative irrigation and WaterWise principles (minimal turf, drought tolerant plants, etc.) are employed.

    PRICE ESTIMATE WORKSHEET

    Use this worksheet to keep track of your price estimates.

    Tank (s)

    • Tank type (material*): fiberglass, polypropylene, concrete, stone, other _________
      * REMEMBER UNLINED, GALVANIZED METAL TANKS ARE NOT ELIGIBLE FOR THE REBATE.
    • Tank size (in gallons):  ________________
    • Tank dimensions (ft.):  ________________
    • Cost of tank and delivery:  ________________

    First Flush Components
    “First flush” is a system of piping to collect debris before it enters the tank.

    Pad Construction

    • Material*: gravel, sand, concrete.
      *Wooden, above ground platforms will not be approved.
    • Site must be level.

    Pump and Optional Float Level Switch

    • Is a pump necessary? Yes ____ No____
      If yes, consider installing a float level switch to prolong the life of the pump.
    • How far do you want to pump the water? ___________

    OPERATION AND MAINTENANCE

    Operation Guide
    Referring to your site plan and system drawing, describe in writing how the system will function.  Include details such as type and size of collection (roof) surface; tank size, composition and location; piping and first flush details; pump type and location or other water distribution method.  (You may attach separate sheets)
    _________________________________________________________________________________
    _________________________________________________________________________________
    _________________________________________________________________________________
    _________________________________________________________________________________
    _________________________________________________________________________________

    Maintenance Plan
    Provide a detailed plan on how maintenance will be done, including scheduled bacteria control measures if spray irrigation is to be used.  (You may attach separate sheets)
    _________________________________________________________________________________
    _________________________________________________________________________________
    _________________________________________________________________________________
    _________________________________________________________________________________
    _________________________________________________________________________________