Texas Water Code - WATER § 26.042. Monitoring and Reporting

(a) The commission may prescribe reasonable requirements for a person making discharges of any waste or of any pollutant to monitor and report on his activities concerning collection, treatment, and disposal of the waste or pollutant.

(b) The commission may, by regulation, order, permit, or otherwise require the owner or operator of any source of a discharge of pollutants into any water in the state or of any source which is an industrial user of a publicly owned treatment works to:

(c) When in the judgment of the commission significant water quality management benefits will result or water quality management needs justify, the commission may also prescribe reasonable requirements for any person or persons making discharges of any waste or of any pollutant to monitor and report on the quality of any water in the state which the commission has reason to believe may be materially affected by the discharges.