Rule 3745-82-02. Secondary maximum contaminant levels

The secondary maximum contaminant levels for public water systems are as follows Contaminant Level Aluminum * . . . . . . . . . . . . . . . . . 0.05 to 0.2 mg/L Chloride . . . . . . . . . . . . . . . . . . . . . 250 mg/L Color . . . . . . . . . . . . . . . . . . . . . . 15 color units Corrosivity . . . . . . . . . . . . . . . . . . . non-corrosive Fluoride . . . . . . . . . . . . . . . . . . . . . 2.0 mg/L Foaming Agents . . . . . . . . . . . . . . . . . . 0.5 mg/L Iron . . . . . . . . . . . . . . . . . . . . . . . 0.3 mg/L Manganese . . . . . . . . . . . . . . . . . . . . 0.05 mg/L Odor . . . . . . . . . . . . . . . . . . . . . . . 3 threshold odor number pH . . . . . . . . . . . . . . . . . . . . . . . . 7.0 - 10.5 Silver . . . . . . . . . . . . . . . . . . . . . . 0.1 mg/L Sulfate . . . . . . . . . . . . . . . . . . . . . 250 mg/L Total dissolved solids (TDS) . . . . . . . . . . . 500 mg/L Zinc . . . . . . . . . . . . . . . . . . . . . . . 5 mg/L * The secondary maximum contaminant level for aluminum is a range, with the precise level applicable to each public water system to be determined by the director. Last updated May 11, 2026 at 9:57 AM Supplemental Information Authorized By: – Amplifies: – 11/26/1980, 3/1/1988