Texas Underground Injection Wells regulations & environmental compliance analysis

Texas Underground Injection Wells: What you need to know

Governing Law and Regulations

Injection Well Act, Texas Water Code (TWC) 27

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Solid Waste Disposal Act, Texas Health and Safety Code (H&SC) 361

Underground injection control (UIC): 30 Texas Administrative Code (TAC) 331.1 to 331.251

Railroad Commission of Texas rules: 16 TAC 3.9, 16 TAC 3.46, 16 TAC 3.95, 16 TAC 3.96, 16 TAC 3.97, 16 TAC 3.13, and 16 TAC 5.101 to 5.308

Applicability: TWC 27

Exemptions: 30 TAC 331.3

Underground injection well classifications (UIW): 30 TAC 331.11, 16 TAC 3.9, and 16 TAC 3.46


TCEQ applications: 30 TAC 331.7

RCT applications: 16 TAC 3.9 and 16 TAC 3.46

Financial assurance: 30 TAC 331.15

Closure of injection wells: 30 TAC 331.121, 30 TAC 331.122, 30 TAC 331.133, and 30 TAC 331.46

Geologic sequestration: 16 TAC 5.101 to 5.308

Regulatory Agencies

Texas Commission on Environmental Quality (TCEQ) Underground Injection Control Program

Railroad Commission of Texas (RCT) Technical Permitting Section

See ADDRESSES & CONTACTS for addresses and telephone numbers.

See national section for basic information and federal regulations.

Comparison: State vs. Federal

Rules. Texas has specific rules relating to underground injection control (UIC) and provides permits for certain classes of wells in appropriate geologic locations. The state standards generally include the federal standards and include more specific standards and state applications and fees for application and operation of underground injection wells. See the national section UNDERGROUND INJECTION WELLS for more information on federal UIC permitting requirements.

Administration and enforcement. The TCEQ and the RCT share the responsibility for permitting and enforcing the UIC standards.

State Requirements


TWC 27

The Texas ...

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