Manganese is a gray-white metal resembling iron. It is hard, very brittle, and has strong magnetic properties when in an external magnetic field. Naturally manganese is rarely found alone in water; it is usually dissolved along with iron. Manganese is important as an industrial alloy used as pigment. It also comes from natural deposits or deposited from airborne sources. Manganese was used in the “Wartime” nickel from 1942-1945, and in dollar coins minted since 2000.

The U. S. Environmental Protection Agency recommends a limit of 0.05 mg/L (or parts per million) for aesthetics such as taste, discoloration, and staining of laundry and plumbing. Manganese deposits in plumbing cause black sediment and blackish turbidity. Also, manganese bacteria are often present which can cause clogs in piping. Manganese is an essential trace element needed by our bodies (found in grains and teas).Remedies are the same as iron above.

• https://www.snyder-associates.com/manganese-in-drinking-water-risk-treatment-options/
• https://www.chemistrylearner.com/manganese.html