LAC 51:XII.358. Treatment Technique Requirement

A. Unless holding a valid variance from mandatory disinfection, each public water system using ground water as its source of water supply shall incur a treatment technique violation when it fails to comply with the minimum residual disinfectant concentration (0.5 mg/l free chlorine or total chlorine) in more than 5.0 percent of the samples collected each month from the distribution system for any two consecutive months. Upon the determination that a treatment technique violation has occurred, the public water system shall provide tier 2 public notification in accordance with §1907.