Texas Administrative Code
Title 30 - ENVIRONMENTAL QUALITY
Part 1 - TEXAS COMMISSION ON ENVIRONMENTAL QUALITY
Chapter 311 - WATERSHED PROTECTION RULES
Subchapter D - WATER QUALITY MANAGEMENT WITHIN LAKE HOUSTON WATERSHED
Section 311.36 - Disinfection

(a) By May 1, 1986, the permittees of all domestic sewage and industrial wastewater treatment facilities discharging into the Lake Houston watershed which utilize gaseous chlorination disinfection systems shall install dual-feed chlorination systems which are capable of automatically changing from one cylinder to another.

(b) Chlorination disinfection systems shall be operated so that a minimum chlorine residual of 1.0 milligram per liter (mg/l) and a maximum chlorine residual of 4.0 mg/l measured on an instantaneous grab sample is not exceeded for discharges into the Lake Houston watershed.