Bexar County, TX Water Use Rules: Recycled Water Rules (2026)
Key Facts
- Major use
- River Walk base flow
- Pipe color
- Purple
- Required device
- Backflow preventer
- Operator
- SAWS
Summary
SAWS operates one of the largest recycled water systems in Texas, serving the San Antonio River Walk base flow and major Bexar County industrial customers. Connections, signage, and cross-connection controls are governed by SAWS service rules.
Sec. 341.039. STANDARDS FOR GRAYWATER AND ALTERNATIVE ONSITE WATER. (a) The commission by rule shall adopt and implement minimum standards for the indoor and outdoor use and reuse of treated graywater and alternative onsite water for: (1) irrigation and other agricultural purposes; (2) domestic use, to the extent consistent with Subsection (c); (3) commercial purposes; and (4) industrial purposes. (a-1) The standards adopted by the commission under Subsection (a)(2) must allow the use of graywater and alternative onsite water for toilet and urinal flushing. (b) The standards adopted by the commission under Subsection (a) must assure that the use of graywater or alternative onsite water is not a nuisance and does not threaten human health.
Full Breakdown
San Antonio Water System pioneered large-scale water reuse, returning highly treated effluent to the San Antonio River for River Walk base flow and supplying purple-pipe customers including golf courses, industrial sites, and major institutions. Customers connecting to the recycled main must follow SAWS reclaimed water service rules, install backflow prevention, and label all valves and outlets. Drinking water cross-connections are strictly prohibited. The reuse system reduces draw on the Edwards Aquifer and stretches the supply for a fast-growing county. Most single-family residents in unincorporated Bexar County do not have access to purple pipe service.
Violations & Fines
Cross-connecting reclaimed water to potable plumbing is a serious health violation; SAWS may shut service, levy charges, and refer cases to TCEQ.
Frequently Asked Questions
Can I irrigate my lawn with reclaimed water?
Is reclaimed water safe to drink?
Sources & Official References
Other rules in Bexar County
Texas rules heatmap·Compare Bexar County to another location·View the Texas water use rules overview
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