What is a safe level of ammonia in drinking water?
GeneralClass 12AllAnswered 27 Mar 2026
Answer
The EPA doesn't set a maximum contaminant level for ammonia in drinking water, but levels above 0.5 mg/L (parts per million) can affect taste and odor. Water treatment facilities typically maintain ammonia below 0.2 mg/L. Higher concentrations may indicate contamination from agricultural runoff or sewage and should be investigated.
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