Rainwater Resources

Curated links to Texas and national guidance, codes/standards, and data sources to help you plan and learn more about rainwater harvesting.

Supporters

Guidance, manuals, and background for rainwater harvesting in Texas.

Practical how‑tos, trainings, and the Texas Manual on Rainwater Harvesting.

Program information, public water system considerations, and guidance.

Information on groundwater conservation districts in Texas.

American Rainwater Catchment Systems Association: training, standards, and advocacy.

Best practices for outdoor water efficiency and program resources.

Technical standards for design and installation of rainwater and stormwater catchment systems.

Local jurisdictions may adopt the UPC, IPC, or amendments covering non‑potable and potable rainwater systems.

High‑resolution gridded climate data used for precipitation estimates.

Climate Data Online for station and gridded precipitation records.

Enter your address, roof area, and typical monthly use to see a data‑driven recommendation.