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Secondary Drinking Water Standards

 

No adverse health effects are generally associated with the secondary drinking water contaminants. At considerably higher concentrations than those listed in the standards, health implications may exist as well as aesthetic degradation.

Contaminant Allowed Level
Aluminum 0.2 mg/L
Chloride 250 mg/L
Copper 1 mg/L
Fluoride 2.0 mg/L
Iron 0.3 mg/L
Manganese 0.05 mg/L
Silver 0.1 mg/L
Sulfate 250 mg/L
Zinc 5 mg/L
Color 15 color units
Odor 3 (threshold odor number)
pH 6.5 - 8.5
Total Dissolved Solids 500 mg/L
Foaming Agents 0.5 mg/L

Last updated: September 30, 2014

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