What is the rule of capture in plain English?

The rule of capture, as the common-law default, treats groundwater beneath your land as belonging to you and allows pumping without liability even if your pumping causes your neighbor's well to run dry — subject to narrow common-law limits (malicious pumping, negligent pumping causing subsidence, waste) and to valid GCD regulation within a district. It is sometimes called the "law of the biggest pump" because the landowner with the biggest pumping capacity captures the most water. The rule was adopted by the Texas Supreme Court in 1904 in Houston & T.C. Railway v. East and remains the common-law default in Texas — but it is now heavily modulated by Groundwater Conservation Districts under Water Code Chapter 36 for most of the state. Outside a GCD, the pure rule of capture still applies; inside a GCD, district rules govern.

How do I know if my property is inside a Groundwater Conservation District?

Texas has roughly 100 GCDs, and coverage is extensive but not universal. The Texas Water Development Board maintains a map of GCDs at twdb.texas.gov showing district boundaries statewide. You can also contact your county appraisal district or your county extension office to identify the GCD covering your property. If your property is in a district, contact the district office before drilling a well to determine whether a permit is required, what spacing rules apply, and whether any production limits govern your intended use. If your property is outside any GCD, the pure common-law rule of capture governs, but you should still check with the Texas Department of Licensing and Regulation for well driller requirements.

Are domestic wells exempt from GCD permit requirements?

Under §36.117(b)(1), a well is mandatorily exempt from GCD permit requirements only if BOTH conditions are met: (1) the water is used solely for domestic use OR for providing water for livestock or poultry, AND (2) the well is located on a tract larger than 10 acres AND is drilled, completed, or equipped so that it is incapable of producing more than 25,000 gallons of groundwater per day. Both conditions must be satisfied. Wells producing for commercial, agricultural, or industrial use typically require a permit regardless of production level. Districts also commonly require well driller reports even for exempt wells under §36.111, so notification requirements may apply even where no permit is needed. And §36.117(d) permits the district to cancel a previously granted exemption if the water use later ceases to qualify.

What did Edwards Aquifer Authority v. Day change?

The Day decision confirmed in 2012 that landowners have a "real and substantive" ownership interest in the groundwater in place beneath their land, protected under Texas Constitution Article I §17 and the Fifth Amendment. Before Day, some argued that groundwater was only "publicly owned" or subject to unlimited regulation without takings analysis. Day rejected that view. GCDs retain substantial authority to permit, restrict spacing, and limit production, but a regulation that goes too far in restricting a landowner's beneficial use may constitute a compensable regulatory taking. The line between valid regulation and taking follows standard Penn Central factors. Landowners denied permits or facing severe production limits may pursue Day-based takings claims, though the standard for prevailing is high.

Can a neighbor sue me if my pumping causes their well to run dry?

Under the pure rule of capture, generally no — the neighbor has no cause of action for drainage of their well as a result of your pumping. Three narrow common-law exceptions exist: (1) malicious pumping done with intent to injure rather than for beneficial use is actionable; (2) negligent pumping that causes subsidence to the neighbor's property can support a negligence claim under Friendswood Development Co. v. Smith-Southwest; and (3) waste in the production of groundwater is actionable. Inside a GCD, district rules on spacing and production limits may also provide a cause of action for well interference. Outside a GCD, the neighbor's remedy is generally to drill a deeper well or to relocate the well.

How does groundwater in Texas differ from surface water?

Substantially. Surface water in Texas is owned by the state under the prior-appropriation doctrine — landowners must obtain a water right from the Texas Commission on Environmental Quality (TCEQ) to divert and use surface water, and the "first in time, first in right" rule governs allocations. Groundwater is owned by the surface landowner under the rule of capture (as modulated by Chapter 36 GCDs). The two systems have historically operated in parallel, but expanding aquifer-surface-water interactions have led to increased regulatory attention. Certain aquifers with strong surface-water connections (like the Edwards Aquifer) are subject to more comprehensive regulation. The distinction between surface water and groundwater ownership is one of the most consequential differences in Texas water law.

TX Groundwater Rule of Capture + GCD Framework

TL;DR

Texas groundwater rights are governed by the common-law "rule of capture" first adopted by the Texas Supreme Court in Houston & T.C. Railway v. East (1904), which treats percolating groundwater as the property of the owner of the surface land above it and permits the surface owner, as the common-law default, to withdraw groundwater without liability for drainage of neighboring wells, subject to narrow common-law limits and valid GCD regulation. The rule of capture remains the common-law default in Texas, but is now heavily modulated by Water Code Chapter 36, which authorizes Groundwater Conservation Districts (GCDs) to regulate groundwater production through permitting, spacing, and production limits within their boundaries. Texas has roughly 100 GCDs, and coverage under Chapter 36 is extensive but not universal; landowners within a GCD are subject to district rules, while landowners outside any GCD remain governed by the pure rule of capture. The Texas Supreme Court in Edwards Aquifer Authority v. Day (2012) confirmed that landowners have a "real and substantive" constitutionally protected ownership interest in groundwater in place, adding Fifth Amendment takings analysis to any regulation that goes too far. Sixteen Groundwater Management Areas (GMAs) coordinate multi-district joint planning under §36.108. Mandatory permit exemption under §36.117(b)(1) requires both a >10-acre tract AND a well incapable of producing more than 25,000 gallons per day for domestic use or livestock/poultry water.

The rule of capture: Texas common-law default

Texas follows the "rule of capture" — sometimes called the "English rule" or the "law of the biggest pump" — for groundwater. The rule of capture originated in Houston & T.C. Railway Co. v. East, 98 Tex. 146 (1904), where the Texas Supreme Court held that percolating groundwater beneath a landowner's tract is the exclusive property of that landowner, and that the landowner may pump groundwater without liability to a neighboring landowner whose well runs dry as a result, subject to narrow common-law limits and (today) valid GCD regulation. Water is a fugitive resource — like oil or gas or wild game — and only reduces to ownership when captured. The landowner who pumps first captures the water; the neighbor whose well runs dry has no cause of action.

The doctrine has been affirmed and refined but never overturned in Texas common law. Sipriano v. Great Spring Waters of America, Inc., 1 S.W.3d 75 (Tex. 1999), reaffirmed the rule of capture in the face of a challenge, though the Court invited the Legislature to consider alternatives — an invitation that led to expanded Chapter 36 authority for Groundwater Conservation Districts. City of Corpus Christi v. City of Pleasanton, 154 Tex. 289 (1955), had earlier applied the rule to municipal water production. The Texas approach contrasts sharply with the "American rule" of reasonable use, the correlative-rights doctrine used in many western states, and the "prior appropriation" doctrine that governs surface water in Texas and groundwater in some other states.

Common-law limitations on the rule of capture

The rule of capture is not absolute. Texas courts have recognized three narrow common-law limitations that a plaintiff can invoke against a pumping landowner. First, malicious pumping — pumping done with the intent to injure a neighbor rather than for any beneficial use — is actionable. Second, negligent pumping that causes subsidence to a neighboring property can create liability, as recognized in Friendswood Development Co. v. Smith-Southwest Industries, Inc., 576 S.W.2d 21 (Tex. 1978), which held that a landowner who negligently causes subsidence to neighboring land through groundwater withdrawal can be liable in negligence. Third, waste in the production of groundwater is actionable — using groundwater in a way that constitutes waste rather than beneficial use is not protected by the rule of capture.

These common-law limitations are narrow and are rarely successful in practice. The primary check on unlimited pumping in Texas today is not common-law limitation but statutory regulation by Groundwater Conservation Districts under Water Code Chapter 36. For related state-specific property-rights frameworks, see our Texas constitutional homestead protection guide and our Texas statutory deed warranties guide.

Water Code Chapter 36: Groundwater Conservation Districts

Recognizing the limits of the rule of capture in an era of expanding population, agriculture, and industry, the Texas Legislature has authorized the creation of Groundwater Conservation Districts (GCDs) to regulate groundwater production within their boundaries. Water Code Chapter 36 provides the comprehensive statutory framework. Section 36.001 defines a GCD as the state's preferred method of groundwater management, and Chapter 36 empowers each district to issue permits, set spacing requirements for wells, impose production limits, require water-well drillers to file reports, and enforce compliance through cease-and-desist orders and civil penalties.

Texas has roughly 100 GCDs, and coverage is extensive but not universal — from small single-county districts to multi-county regional districts. GCDs are typically created by special act of the Legislature or by petition and confirmation election under §36.011 et seq. Once created, a GCD has statutory authority to regulate groundwater within its boundaries subject to the constraints of Chapter 36 and any specific enabling legislation. Landowners within a GCD are subject to district rules; landowners outside any GCD remain governed by the pure common-law rule of capture. The map of Texas GCDs is available from the Texas Water Development Board at twdb.texas.gov.

Permitting, exemptions, and production limits

Under §36.113, most non-exempt groundwater wells within a GCD require a district-issued permit before drilling or production. The permit application specifies the location, depth, capacity, purpose, and anticipated production of the well. Districts may condition permits on spacing requirements (minimum distance from other wells), production limits (maximum annual withdrawal), reporting requirements, and monitoring conditions. Section 36.116 authorizes GCDs to both provide for the spacing of water wells and regulate the production of wells in order to minimize drawdown, control subsidence, or prevent waste. Section 36.117 governs exemptions from permit requirements — including the mandatory exemption for certain domestic and livestock wells.

Regulatory Tool	Statutory Basis	Common Application
Well permit	§36.113	Required for most non-exempt wells; application must specify location, depth, capacity, purpose
Well spacing	§36.116	Minimum distance between wells to prevent interference and unreasonable drainage
Production limits	§36.116	Annual withdrawal caps to minimize drawdown, control subsidence, or prevent waste (same statute as spacing authority)
Mandatory exemption	§36.117(b)(1)	Domestic use OR livestock/poultry water only — mandatory exemption requires BOTH: located on a tract larger than 10 acres AND well drilled/completed/equipped so it is incapable of producing more than 25,000 gallons of groundwater per day
Well driller reports	§36.111 and Occupations Code Ch. 1901	Licensed drillers must file well logs and completion reports with the district and TDLR
Enforcement	§§36.101-36.102	Cease-and-desist orders, civil penalties up to $10,000 per day per violation, injunctive relief

The distinction between exempt and non-exempt wells is critical for landowners. Under §36.117(b)(1), the mandatory exemption requires BOTH conditions: the well must be located on a tract larger than 10 acres AND drilled, completed, or equipped so that it is incapable of producing more than 25,000 gallons per day, AND the water must be used solely for domestic use OR for providing water for livestock or poultry. Wells that do not satisfy both conditions typically require a permit even for domestic-use purposes. Section 36.117(b)(2) also exempts wells drilled solely to supply water for a rig actively engaged in oil or gas drilling operations permitted by the Railroad Commission of Texas, and §36.117(b)(3) exempts water wells authorized under RRC-issued mining permits. Districts may impose their own additional exemptions but cannot narrow the mandatory statutory exemptions. Districts may cancel previously granted exemptions under §36.117(d) if the exempt use ceases. A landowner drilling a new well must contact the local GCD before drilling to determine whether a permit is required.

Groundwater Management Areas and joint planning

Water Code §36.108 requires the Texas Water Development Board to designate Groundwater Management Areas (GMAs) covering the state's major and minor aquifers. Sixteen GMAs currently exist, each containing one or more GCDs that must engage in "joint planning" for the aquifer under §36.108(d). The joint planning process produces a Desired Future Condition (DFC) for each aquifer within the GMA — a quantitative goal for how much water will remain in the aquifer at a specified future date, typically 50 years out.

Once GCDs within a GMA agree on the DFC (which requires a two-thirds vote of the GCDs in the GMA), the Texas Water Development Board calculates a Modeled Available Groundwater (MAG) number — the total quantity of water that can be produced annually to achieve the DFC. Each GCD then uses the MAG for its portion of the aquifer to set production limits, spacing rules, and permit conditions. This regional coordination allows aquifer-wide management even where individual GCDs regulate only their district's boundaries. Disputes over DFCs may be appealed to the Texas Water Development Board and ultimately to the Travis County district court.

Constitutional protection: the Day decision

In Edwards Aquifer Authority v. Day, 369 S.W.3d 814 (Tex. 2012), the Texas Supreme Court held that landowners have a "real and substantive" ownership interest in the groundwater beneath their land, and that this ownership interest is protected under Article I §17 of the Texas Constitution and the Fifth Amendment. Day arose from the Edwards Aquifer Authority's denial of a historical-use permit to a South Texas landowner; the Court held that a regulation that goes too far in restricting groundwater production can constitute a compensable taking of the landowner's property interest.

The Day decision does not abolish groundwater regulation — GCDs retain substantial authority to permit, spacing-restrict, and production-limit groundwater use. But Day adds constitutional review: a regulation that severely restricts a landowner's beneficial use of their groundwater may support a takings claim. The line between valid regulation and unconstitutional taking follows standard regulatory takings jurisprudence under Penn Central factors — the economic impact of the regulation, the extent to which it interferes with distinct investment-backed expectations, and the character of the government action. Landowners denied permits or subject to severe production limits may pursue Day-based takings claims. For related state-specific frameworks that intersect with property rights and regulatory takings, see our Texas property tax appraisal protest guide.

Frequently Asked Questions

What is the rule of capture in plain English?: The rule of capture, as the common-law default, treats groundwater beneath your land as belonging to you and allows pumping without liability even if your pumping causes your neighbor's well to run dry — subject to narrow common-law limits (malicious pumping, negligent pumping causing subsidence, waste) and to valid GCD regulation within a district. It is sometimes called the "law of the biggest pump" because the landowner with the biggest pumping capacity captures the most water. The rule was adopted by the Texas Supreme Court in 1904 in Houston & T.C. Railway v. East and remains the common-law default in Texas — but it is now heavily modulated by Groundwater Conservation Districts under Water Code Chapter 36 for most of the state. Outside a GCD, the pure rule of capture still applies; inside a GCD, district rules govern.
How do I know if my property is inside a Groundwater Conservation District?: Texas has roughly 100 GCDs, and coverage is extensive but not universal. The Texas Water Development Board maintains a map of GCDs at twdb.texas.gov showing district boundaries statewide. You can also contact your county appraisal district or your county extension office to identify the GCD covering your property. If your property is in a district, contact the district office before drilling a well to determine whether a permit is required, what spacing rules apply, and whether any production limits govern your intended use. If your property is outside any GCD, the pure common-law rule of capture governs, but you should still check with the Texas Department of Licensing and Regulation for well driller requirements.
Are domestic wells exempt from GCD permit requirements?: Under §36.117(b)(1), a well is mandatorily exempt from GCD permit requirements only if BOTH conditions are met: (1) the water is used solely for domestic use OR for providing water for livestock or poultry, AND (2) the well is located on a tract larger than 10 acres AND is drilled, completed, or equipped so that it is incapable of producing more than 25,000 gallons of groundwater per day. Both conditions must be satisfied. Wells producing for commercial, agricultural, or industrial use typically require a permit regardless of production level. Districts also commonly require well driller reports even for exempt wells under §36.111, so notification requirements may apply even where no permit is needed. And §36.117(d) permits the district to cancel a previously granted exemption if the water use later ceases to qualify.
What did Edwards Aquifer Authority v. Day change?: The Day decision confirmed in 2012 that landowners have a "real and substantive" ownership interest in the groundwater in place beneath their land, protected under Texas Constitution Article I §17 and the Fifth Amendment. Before Day, some argued that groundwater was only "publicly owned" or subject to unlimited regulation without takings analysis. Day rejected that view. GCDs retain substantial authority to permit, restrict spacing, and limit production, but a regulation that goes too far in restricting a landowner's beneficial use may constitute a compensable regulatory taking. The line between valid regulation and taking follows standard Penn Central factors. Landowners denied permits or facing severe production limits may pursue Day-based takings claims, though the standard for prevailing is high.
Can a neighbor sue me if my pumping causes their well to run dry?: Under the pure rule of capture, generally no — the neighbor has no cause of action for drainage of their well as a result of your pumping. Three narrow common-law exceptions exist: (1) malicious pumping done with intent to injure rather than for beneficial use is actionable; (2) negligent pumping that causes subsidence to the neighbor's property can support a negligence claim under Friendswood Development Co. v. Smith-Southwest; and (3) waste in the production of groundwater is actionable. Inside a GCD, district rules on spacing and production limits may also provide a cause of action for well interference. Outside a GCD, the neighbor's remedy is generally to drill a deeper well or to relocate the well.
How does groundwater in Texas differ from surface water?: Substantially. Surface water in Texas is owned by the state under the prior-appropriation doctrine — landowners must obtain a water right from the Texas Commission on Environmental Quality (TCEQ) to divert and use surface water, and the "first in time, first in right" rule governs allocations. Groundwater is owned by the surface landowner under the rule of capture (as modulated by Chapter 36 GCDs). The two systems have historically operated in parallel, but expanding aquifer-surface-water interactions have led to increased regulatory attention. Certain aquifers with strong surface-water connections (like the Edwards Aquifer) are subject to more comprehensive regulation. The distinction between surface water and groundwater ownership is one of the most consequential differences in Texas water law.

Bottom Line

Texas recognizes a landowner's ownership interest in groundwater in place, subject to the rule of capture and to valid regulation by Groundwater Conservation Districts. As the common-law default, the surface landowner may withdraw groundwater without liability for drainage of neighboring wells (Houston & T.C. Railway v. East, 1904; reaffirmed in Sipriano v. Great Spring Waters, 1999). Common-law limitations are narrow: malicious pumping, negligent pumping causing subsidence (Friendswood Development, 1978), and waste in production. Water Code Chapter 36 authorizes Groundwater Conservation Districts (GCDs) to regulate groundwater production through permits (§36.113), spacing and production regulation (§36.116), and enforcement including civil penalties up to $10,000 per day per violation (§36.101). Section 36.117 governs exemptions. Texas has roughly 100 GCDs, and coverage is extensive but not universal; landowners within a GCD are subject to district rules, while landowners outside any GCD remain governed by pure rule of capture. Sixteen Groundwater Management Areas (GMAs) coordinate multi-district joint planning under §36.108 to establish Desired Future Conditions (DFCs) and Modeled Available Groundwater (MAG) figures used by GCDs to set production limits. Domestic-use and livestock/poultry-water wells are mandatorily exempt under §36.117(b)(1) only when the well is on a tract larger than 10 acres AND is incapable of producing more than 25,000 gallons/day (both conditions required). Edwards Aquifer Authority v. Day (2012) confirmed constitutional ownership of groundwater in place under Tex. Const. Art. I §17 and the Fifth Amendment, adding regulatory takings analysis under Penn Central to severe restrictions on production. For related state-specific frameworks, see our Texas constitutional homestead protection guide, our Texas property tax appraisal protest guide, and our Texas statutory deed warranties guide.

Source: Texas Water Code Chapter 36 — Groundwater Conservation Districts · Texas Water Development Board — Groundwater Conservation Districts Map · Edwards Aquifer Authority v. Day, 369 S.W.3d 814 (Tex. 2012)