Rebates of $0.50 per gallon (non-pressurized) and $1.00 per gallon (pressurized) are available to customers of Austin Water or a qualifying water provider for installing rainwater harvesting systems. The maximum lifetime rebate amount is $5,000, not to exceed 50 percent of the project cost. Participation is limited to once every 12 months until the maximum rebate amount is reached. Systems of 500 gallons or more require approval prior to purchase and installation. For tax purposes, commercial and multi-family properties must submit a completed IRS Form W-9.

Download the Rainwater Harvesting Rebate application.

Download IRS Form W-9.

Additional Program Requirements

For systems with 500 gallons or more of capacity:

• Include site and system drawings with rebate application. View examples.
• Submit a completed rebate calculation worksheet with final receipts. Download the rebate calculation worksheet.

For pressurized rainwater harvesting systems:

• Install a Reduced Pressure Principle Backflow Preventer (RPZ) immediately downstream of City of Austin water meters.
• Install an RPZ supplying the make-up water for the irrigation system, or permanently disconnect the irrigation system from the potable water system. Alternatively, an approved air gap may be installed immediately upstream of the connection to the irrigation system.
• An operational test of each RPZ must be conducted by a state licensed Backflow Prevention Assembly Tester registered with the City of Austin.
• Install an expansion tank or similar device to allow for the dissipation of excessive pressure.
• Retain the services of a qualified person to perform a Customer Service Inspection.
• Visit the Special Services Division website or contact them at 972-1060 for additional requirements and questions.

For more information, see the Rainwater Harvesting Frequently Asked Questions.