Texas Water Code - WATER § 26.0301. Wastewater Operations Company Registration and Operator Licensing

(a) The holders of permits to discharge wastewater from a sewage treatment facility shall employ a treatment plant operator holding a valid license issued by the commission under Chapter 37 for the type of facility being operated.

(b) Every person that is in the business of providing sewage treatment or collection facility services under contract must hold a valid registration issued by the commission under Chapter 37.

(c) A person who performs process control activities at a sewage treatment facility or supervises the maintenance of a sewage collection system must hold a license issued by the commission under Chapter 37.