Contaminant Guide
Manganese in Your Drinking Water
Manganese causes black or dark brown staining, metallic taste, and at elevated levels, neurological effects. It's common in both Upstate SC mountain water and coastal NC groundwater.
Key Facts
- • EPA lifetime health advisory: 0.3 mg/L; secondary (aesthetic) standard: 0.05 mg/L
- • Manganese is a common cause of black staining on fixtures and laundry
- • The EPA's health advisory reflects concerns about neurological effects from long-term exposure
- • Manganese occurs naturally in the geology of both the SC Upstate and coastal plain
- • Oxidizing filtration media are commonly used to address manganese
The Solution
Oxidizing filtration media (greensand, birm) or air injection systems effectively remove manganese from well water. For municipal water with elevated manganese, catalytic carbon or oxidizing filters are used. ClearFlow tests and recommends the right system.
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Manganese in Drinking Water — FAQ
Black or dark brown stains on fixtures, sinks, and laundry are typically caused by manganese in the water. Manganese oxidizes and deposits on surfaces it contacts.
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