View all text of Subpart A [§ 143.1 - § 143.9]
§ 143.3 - 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. | Copper | 1.0 mg/l. | 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 | 6.5-8.5. | Silver | 0.1 mg/l. | Sulfate | 250 mg/l. | Total dissolved solids (TDS) | 500 mg/l. | Zinc | 5 mg/l. |
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