N.C. Gen. Stat. § 130A-318: Disinfection of public water systems.

(a) The Department is authorized to require disinfection of:

(1) Public water systems introduced on or after January 1, 1972; and

(2) All public water systems, regardless of the date introduced, whenever:

a. The maximum microbiological contaminant level is exceeded; or

b. Conditions exist which make continued use of the water potentially hazardous to public health.

(b) Public water systems shall employ disinfection methods and procedures approved by the Department. (1979, c. 788, s. 1; 1983, c. 891, s. 2.)