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Home » Resources » Maximum Contaminant Levels » Manganese

Maximum Contaminant Levels: Manganese

This page contains maximum contaminant levels for manganese.

Drinking Water

Summary: Water is not safe to drink if manganese exceeds 50 µg/L (micrograms per cubic liter).

Colorado: 50 µg/L SMCL - Colorado Department of Public Health and Environment¹

Secondary MCL (SMCL) - This basically means that they don't consider manganese dangerous. We believe the research is clear. Manganese is harmful and should be placed on the MCL list.