R309-200-6. Secondary Drinking Water Standards for Community, Non-Transient Non-Community and Transient Non-Community Water

The Secondary Maximum Contaminant Levels for public water systems deals with substances which affect the aesthetic quality of drinking water. They are presented here as recommended limits or ranges and are not grounds for rejection. The taste of water may be unpleasant and the usefulness of the water may be impaired if these standards are significantly exceeded.

TABLE 200-7

SECONDARY INORGANIC CONTAMINANTS

     Contaminant Level

     Aluminum 0.05 to 0.2 mg/L

     Chloride 250 mg/L

     Color 15 Color Units

     Copper 1 mg/L

     Corrosivity Non-corrosive

     Fluoride 2.0 mg/L (see Note below)

     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 (see Note below)

     TDS 500 mg/L (see Note below)

     Zinc 5 mg/L

    Note: Maximum allowable Fluoride, TDS and Sulfate levels are given in the Primary Drinking Water Standards, R309-200-5(1). They are listed as secondary standards because levels in excess of these recommended levels will likely cause consumer complaint.