Texas Water Code - WATER § 36.251. Suit Against District

(a) A person, firm, corporation, or association of persons affected by and dissatisfied with any rule or order made by a district, including an appeal of a decision on a permit application, is entitled to file a suit against the district or its directors to challenge the validity of the law, rule, or order.

(b) Only the district, the applicant, and parties to a contested case hearing may participate in an appeal of a decision on the application that was the subject of that contested case hearing.  An appeal of a decision on a permit application must include the applicant as a necessary party.

(c) The suit shall be filed in a court of competent jurisdiction in any county in which the district or any part of the district is located.  The suit may only be filed after all administrative appeals to the district are final.