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Rainwater harvesting involves the capture, diversion, and storage of rainwater for later use. It’s a water conservation method an alternative water source and a water conservation method that can reduce the pressure on aquifer systems by reducing pumping needs.

  • Rainwater Harvesting 201: Irrigation • April 5, 2024 • 11:00 AM – 1:00 PM – Register here.
  • Rainwater Harvesting 101 • Thurs. May 2, 2024 • 9:00 AM – 11:00 AM – Register here

Rainwater Harvesting Rebate Program

Post Oak Savannah offers a rainwater harvesting rebate to promote and encourage collection as a water conservation method. Rainwater harvesting can help reduce peak season pumping demands on our aquifers in the summer months, reduce stormwater runoff, and provide an alternative water supply source that will improve water quality and reduce erosion. For every 1 inch of rainfall 0.6 gallons can be collected for each square foot of collection surface ->  (2,000 sq. ft. roof) x (0.6 gallons) = 1,200 gallons harvested per 1 inch of rainfall.

Application Form & Guidelines

Program Policy & Guidelines
Rebate Application Form
Form 01 339 Texas Sales And Use Tax Resale

Program Details & Qualifications

  1. Applicants must reside or own land within the District (Burleson or Milam County).
  2. Applicants must complete an approved Rainwater Harvesting 101 course to qualify.
  3. Only one application per household can be filed within a 12 month period with a lifetime reimbursement maximum of $5,000.
  4. Reimbursements are limited to $1.00 per gallon of the rainwater storage capacity of the completed system; includes tanks, gutter, tank foundation, overflow, and other misc. Items needed to create the system.
    1. District staff must approve site plans before the purchase of reimbursable rainwater equipment and will be inspected after installation.
    2. Short-term financial assistance may be available for qualifying applicants, contact the office for details.

Program Contact:
Jaclyn Wise, Public Relations and Education Coordinator
Call/text (512) 760-6586

Rainwater Harvesting Resources

Not sure how big of a tank you’ll need?
Try out a few of these calculators, they’re designed to help determine how much water you’ll want to save and what size harvesting system will best suit your needs. 

Need help planning your system?
Here are a few guides designed to help homeowners create their own system. 

Texas Tax Code Incentive
The Texas Tax Code §151.355 exempts rainwater harvesting equipment and supplies from state sales tax. To claim this exemption, a purchaser of rainwater harvesting equipment must furnish a Tax Exemption Application Form 01-339 to the supplier of the equipment.

Rainwater Tank Sources
POSGCD’s rainwater harvesting tanks uses for demonstrations were purchased from these suppliers. 

Feel free to reach out by phone (call or text) Jaclyn at  (512) 760-6586 or email with any questions!


Program Materials

View presentation materials from completed workshops and programs, linked below.

EarthKind Landscapes • March 10, 2023
EarthKind Pollinator Plants & Propagation •  April 30, 2022
EarthKind Edible Landscapes • Slideshow Presentation
Virtual Earthkind Plants for Pollinators • March 24, 2021 • Slideshow Presentation
EarthKind Landscapes & Plant Selection • October 29, 2021 • Slide Show Presentation
Landscape Management for Water Conservation (EarthKind) Program  • May 22, 2020• Slideshow Presentation 

Irrigation for Rainwater Harvesting Presentation • Feb 22, 2020 Irrigation for Rainwater Harvesting Presentation

Rainwater Collection Calculator  Click Here for Calculator

 Landscape & Irrigation Workshop • March 2, 2018 Post Oak Savannah Building Landscape – Native Plants List
Rainwater Harvesting 101 • December 2, 2017 – Present Understanding Rainwater Harvesting Systems
EarthKind Landscaping for Water Conservation • November 6, 2016
EarthKind Landscape Presentation – Part One
EarthKind Landscape Presentation – Part Two
Rebate Program Presentation – Rainwater Harvesting 101 • October 10, 2017 POSGCD Rainwater Rebate Program Presentation
Irrigation Alternatives using Rainwater Harvesting • Irrigation Alternative for Rainwater Harvesting presentation
Rainwater Harvesting 101 – Rockdale Library • Rockdale Library Rainwater Harvesting 101 Presentation

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