DISINFECTION OF DOMESTIC WATER LINES

This procedure is to provide clear guidelines for disinfecting water piping. This procedure covers new domestic water pipe installations and maintenance on existing piping. II. GENERAL Heavy particulates generally contain bacteria and prevent even very high chlorine concentrations from contacting and killing such organisms. It is, therefore, essential that the procedures of this section be observed to assure that a water main and its appurtenances are thoroughly clean for the final disinfection by chlorination. Also, any connection of a new water main to the active distribution system prior to receipt of satisfactory bacteriological samples may constitute a cross-connection. Therefore, the new main must be isolated until a bacteriological test is satisfactorily completed. The United States Environmental Protection Agency sets national standards for drinking water. To insure our compliance with these standards all work done on domestic water piping will be disinfected according to the following processes. Disinfection activities must be coordinated with and approved by the Utilities Division’s Master Water Technician. The six main steps of disinfection are; 1. Preventing contamination materials from entering the water main during storage