Tomball, TX Landscaping Rules: Rainwater Harvesting (2026)
Key Facts
- State Protection
- HB 3391 prohibits city bans
- HOA Override
- Property Code 202.007 protects homeowners
- Sales Tax
- Equipment exempt under Tax Code 151.355
- Local Permit
- Not required for rain barrels
- Avg Rainfall
- ~50 inches annually
Summary
Texas state law protects the right to collect rainwater and prohibits cities and HOAs from banning rainwater harvesting systems. Tomball has no local ordinance restricting residential rain barrel or cistern use. Property owners may collect and use rainwater for irrigation and non-potable purposes without a city permit.
Texas is one of only a few states in the nation that has devoted a considerable amount of attention to rainwater harvesting and has enacted many laws regulating the practice of collecting rainwater. Texas Tax Code 151.355 allows for a state sales tax exemption on rainwater harvesting equipment. Texas Property Code 202.007 prevents homeowners associations from banning rainwater harvesting installations. Texas House Bill 3391 requires rainwater harvesting system technology to be incorporated into the design of new state buildings and allows financial institutions to consider making loans for developments using rainwater as the sole source of water supply.
Full Breakdown
Texas actively encourages rainwater harvesting through multiple state laws. House Bill 3391 (2011) requires new state-funded buildings to incorporate rainwater harvesting and prohibits municipalities from banning residential rainwater collection systems. 007 prevents HOAs from prohibiting rainwater harvesting devices on residential property. 355 provides a sales tax exemption for rainwater harvesting equipment including storage tanks, gutters, downspouts, filters, and first-flush diverters. Tomball does not impose additional local restrictions on rainwater collection. Standard rain barrels (typically 55 to 100 gallons) used for landscape irrigation do not require a city permit.
Larger above-ground cisterns or storage tanks that exceed typical accessory structure thresholds may trigger a review under Tomball's building and zoning regulations. If rainwater is intended for potable indoor use, the system must comply with Texas Commission on Environmental Quality (TCEQ) guidelines including proper filtration, disinfection, and treatment. Cross-connections with the city water supply require backflow prevention devices per the Texas Plumbing Code. Tomball's location in the Spring Creek watershed with average annual rainfall around 50 inches makes rainwater harvesting particularly effective for supplemental irrigation.
Violations & Fines
There are no penalties for collecting rainwater in Tomball. If a large storage tank is installed without required building permits for oversized accessory structures, standard code enforcement penalties apply. Improper cross-connections with city water without backflow prevention may result in plumbing code violations.
Frequently Asked Questions
Is it legal to collect rainwater in Tomball?
Can my HOA prevent me from installing a rain barrel?
Do I need a permit for a rain barrel in Tomball?
Sources & Official References
Other rules in Tomball
Texas rules heatmap·Compare Tomball to another location·View the Texas landscaping rules overview
See something wrong?
Help us keep this page accurate. If you notice an error or outdated information, let us know.
Rainwater Harvesting in Nearby Cities
How other cities in Harris County handle rainwater harvesting.