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Showing 1 to 1 of 1 for “"naturally-occurring contaminants"”.
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Assessing the geologic sources of manganese in the Roanoke River watershed
Elevated manganese (Mn) concentrations have been measured in groundwater within the Roanoke River watershed, Virginia. Concentrations of Mn often exceed the secondary drinking water standard. A historic belt of Mn ores, the James River-Roanoke River Manganese District (JRRRMD), occurs in the …