Description
Manganese is a non-hazardous element that is chemically similar to iron and can cause similar problems. Manganese is less common than iron and both are considered 'nuisance chemicals' by the EPA.
Manganese in Drinking Water
High levels of manganese in water supplies can be indicated by the water having a black to brown color and bitter metallic taste. It can also cause black staining.
Resources
KDHE
U.S. Environmental Protection Agency
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