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Commonly found in water due to agricultural runoff, sewage, and industrial waste.
Can cause methemoglobinemia, or "blue baby syndrome," in infants and may increase the risk of cancer and thyroid problems with prolonged exposure.
A naturally occurring mineral in water that contributes to hardness.
A mineral essential for bodily functions, found naturally in water.
A mineral that enters water from natural sources or industrial discharge.
A common metal in water, often from natural deposits or corroded pipes.