NAC445A.455. Secondary standards: General requirements.

     1. Secondary maximum contaminant levels, which apply to public water systems, are listed in the following table:

Constituent or Indicator	Secondary Maximum Contaminant Level (milligrams/Liter or mg/L)
Aluminum	0.2 mg/L
Chloride	400 mg/L
Copper	1.0 mg/L
Foaming Agents	0.5 mg/L
Iron	0.6 mg/L
Magnesium	150 mg/L
Manganese	0.1 mg/L
Silver	0.1 mg/L
Sulfate	500 mg/L
Total Dissolved Solids (TDS)	1,000 mg/L
Zinc	5.0 mg/L
	Other units or indicators
Color	15 color units
Odor	3.0 threshold odor number
pH	6.5 to 8.5

     2. Except as otherwise provided in NAC 445A.6682, the standard for fluoride in community and nontransient, noncommunity water systems is 2.0 milligrams per liter.

     [Bd. of Health, Water Quality Standards Art. 4 §§ 4.1-4.2, eff. 12-14-77]—(NAC A 3-22-89; 12-3-90; 9-6-96; R118-99, 2-10-2000; A by Environmental Comm’n by R126-05, 10-31-2005)