Texas Water Code - WATER § 31.018. Financial Responsibility

(a) The commission may require in a permit that the permittee reimburse the commission for reasonable costs of monitoring and on-site, full-time surveillance to determine compliance with a rule, permit, or other order of the commission.

(b) A person to whom a permit is issued may be required by the commission to maintain a performance bond or other form of financial security to ensure payment of costs that may become due in accordance with Subsection (a) of this section or to ensure that an abandoned subsurface excavation is safely and properly sealed and that the land surface affected by any subsurface construction and operation is restored to conditions as stated in the permit.