In accordance with the provisions of the Administrative Procedure Act, (R.S. 49:950, et seq.), the Department of Health and Hospitals, Office of Public Health (DHH/OPH) proposes to promulgate a rule to finalize the requirements of the emergency rule (the “ER”) concerning disinfection of public water systems initially promulgated on November 6, 2013, and presently in effect as a result of subsequent re-declarations. The proposed rule amends Chapter 3 (Water Quality Standards), Chapter 9 (Louisiana Total Coliform Rule), Chapter 11 (Surface Water Treatment Rule), Chapter 15 (Approved Chemical Laboratories/Drinking Water) and Chapter 19 (Public Notification Rule) of Part XII (Water Supplies) of Title 51 (Public Health−Sanitary Code) of the Louisiana Administrative Code (LAC).