Rule 391-3-5-.19. Secondary Maximum Contaminant Levels for Drinking Water

1. (1) Adverse Effects on Drinking Water. The drinking water should not contain any contaminant which will adversely affect the odor or appearance of the drinking water and consequently may cause a substantial number of the persons served by the public water system to discontinue its use or which may adversely affect the public welfare.

(2) Secondary MCLs. The Secondary maximum contaminant levels established below represent reasonable goals for drinking water quality: Contaminant Secondary Level Aluminum (Al) 0.05 to 0.2 mg/L Chloride 250 mg/L Color 15 color units Copper (Cu) 1.0 mg/L Corrosivity Non-corrosive Fluoride (F) 2.0 mg/L Foaming Agents 0.5 mg/L Iron (Fe) 0.3 mg/L Manganese (Mn) 0.05 mg/L Odor 3 threshold odor number pH 6.5 to 8.5 Silver (Ag) 0.1 mg/L Sulfate 250 mg/L Total dissolved solids (TDS) 500 mg/L Zinc (Zn) 5.0 mg/L

1. (3) Standard Methods. Any analyses required under this rule shall be conducted in accordance with the analytical recommendations set forth in the latest edition of "Standard Methods of Examination of Water and Wastewater" as published by the American Public Health Association, or as such analyses may be modified by the Director.
2. (4) Collect and Submit Samples for Analyses. Upon written direction of the Director, the supplier shall collect drinking water samples and submit them to the Division's water laboratory or other laboratory for analyses in accordance with the schedule furnished to the supplier.

Authority: Ga. L. 1977, p. 351, et seq., O.C.G.A. § 12-5-170et seq., as amended.

History. Original Rule entitled "Drinking Water Standards" was filed on September 6, 1973; effective September 26, 1973.

Amended: Rule repealed and a new Rule entitled "Microbiological Contaminant Sampling and Analytical Requirements" adopted. Filed July 5, 1977; effective July 26, 1977, as specified by Rule 391-3-5-.47.

Amended: Filed July 15, 1983; effective August 4, 1983.

Repealed: New Rule entitled "Secondary Maximum Contaminant Levels for Drinking Water" adopted. F. May 12, 1989; eff. June 1, 1989.

Repealed: New Rule, same title, adopted. F. Jun. 25, 1992; eff. July 15, 1992.

Repealed: New Rule, same title, adopted. F. Mar. 10, 1994; eff. Mar. 30, 1994.

Amended: F. Sept. 26, 1997; eff. Oct. 16, 1997.

Amended: F. Jan. 8, 2014; eff. Jan. 28, 2014.

Amended: F. Apr. 22, 2021; eff. May 12, 2021.