Texas Surface Water Rights: What Every Landowner Should Understand

Understanding Texas surface water rights is essential for anyone who owns, buys, or sells rural property in the Lone Star State. Unlike groundwater, Texas surface water rights operate under completely different rules and misunderstanding those rules can create real problems when buying, selling, or developing land.

Here’s what you need to know about Texas surface water rights.

The State Owns Surface Water

When it comes to Texas surface water rights, the first thing landowners need to understand is that surface water, think rivers, streams, lakes, and even rainwater once it enters a natural channel, belongs to the state. The state holds this water in trust for all Texas citizens and grants usage rights through permits.

This surprises many landowners. That creek running through your pasture? The water itself isn’t yours. You may own the land on both sides (and possibly the creek bed itself, depending on navigability), but the flowing water remains state property under Texas surface water rights law.

Texas Water Code §11.021(a) defines state water as “the water of the ordinary flow, underflow, and tides of every flowing river, natural stream, and lake… and the storm water, floodwater, and rainwater of every river, natural stream, canyon, ravine, depression, and watershed in the state.”

What You Can Use Without a Permit

Texas surface water rights law provides important exemptions for rural landowners. Under Texas Water Code §11.142, you can use surface water without a state permit for:

Domestic and livestock purposes – If your property borders a stream, you can divert water directly for household use and watering livestock. This riparian right predates the modern permit system.

The stock tank exemption – You can build a dam, pond, or reservoir on your property storing up to 200 acre-feet of water without a permit, as long as the water is used for domestic, livestock, fish, or wildlife purposes.

One acre-foot equals roughly 325,850 gallons, enough water to cover one acre of land one foot deep. A 20-acre pond averaging 10 feet deep holds approximately 200 acre-feet, which is the maximum allowed under Texas surface water rights exemptions.

What kills the exemption:

• Using pond water for crop irrigation (that’s agricultural use, not domestic)
• Selling water to oil and gas operators
• Commercial aquaculture or fish farming
• Any revenue-generating use beyond basic ranching

If your use changes from exempt to commercial, you’ll need a permit for the new use.

The Prior Appropriation System

When permits are required under Texas surface water rights law, the state follows the prior appropriation doctrine, essentially “first in time, first in right.”

Water rights carry priority dates. During drought, senior rights (older priority dates) get their full allocation before junior rights receive anything. A water right from 1890 is far more valuable than one from 2010 because it’s more reliable when water is scarce.

The Texas Commission on Environmental Quality (TCEQ) administers this system. To obtain a new water right, you must demonstrate:

• Unappropriated water is available
• Your use is beneficial
• The permit won’t impair existing rights
• The use aligns with regional water plans

In heavily appropriated river basins, new permits may be impossible to obtain because no unappropriated water remains.

Diffused Surface Water: The Private Exception

Here’s an important distinction in Texas surface water rights: water that falls as rain on your property remains your private property until it enters a natural watercourse.

This “diffused surface water” includes rainfall runoff flowing across your land before it concentrates into a channel. You can capture and use this water for any purpose without a permit. The 200 acre-foot limit doesn’t apply to diffused surface water.

Practical applications include rooftop rainwater collection, detention ponds in fields, and earthwork that captures sheet flow before it reaches a drainage channel.

The moment that water flows into a natural gully or creek, even on your own property, it becomes state water under Texas surface water rights doctrine.

Why Texas Surface Water Rights Matter for Land Transactions

Texas surface water rights add complexity to land deals. A few things to verify:

• Does the property have documented water rights? Check TCEQ records for any permits or certificates of adjudication.
• Are any rights attached to the property? Texas surface water rights can be severed and sold separately from land.
• Is there an existing stock pond? Confirm it falls within the 200 acre-foot exemption and is used for permitted purposes.
• What river basin is the property in? Some basins (Brazos, Concho, Rio Grande) have active Watermaster programs with additional oversight.

Key Takeaways on Texas Surface Water Rights

Texas surface water rights law creates a system where the state owns the resource but grants private usage rights. For landowners:

• The water flowing through your property belongs to the state
• You can use surface water for domestic and livestock purposes without a permit
• The stock tank exemption allows ponds up to 200 acre-feet for non-commercial use
• Diffused surface water (rainfall before it enters a channel) remains private property
• Texas surface water rights should be verified in any land transaction

Understanding these rules helps you avoid compliance issues and recognize opportunities others might miss.

Questions about Texas surface water rights on your property? Contact us — we’re happy to help.

Make certain to subscribe to our blog. This week we will be highlighting water rights in depth each day. Till then take a look at our blog on Buying Land.

References

1. Texas Water Code §11.021(a) – State Water Definition. Texas Legislature. Available at: https://statutes.capitol.texas.gov/Docs/WA/htm/WA.11.htm
2. Texas Water Code §11.142 – Permit Exemptions (Stock Tank Exemption). Texas Legislature. Available at: https://texas.public.law/statutes/tex._water_code_section_11.142
3. Texas Commission on Environmental Quality. Water Rights Permitting. Available at: https://www.tceq.texas.gov/permitting/water_rights
4. Texas Water Development Board. Surface Water Resources. Available at: https://www.twdb.texas.gov/surfacewater/
5. Texas Landowners Association. “Texas Water Law: A Pond to Call My Own.” June 2019. Available at: https://landassociation.org/texas-water-law-a-pond-to-call-my-own/