Does your water taste metallic, look brackish or do you notice brownish stains?
Similar to iron, manganese is a naturally occurring mineral that is present in soils, rocks, and sediment. While it is an essential mineral, concentrations higher than 0.5 parts per million (ppm) in water are considered unhealthy for human consumption. Well water could have concentrations as high as 2 to 3 parts per million, or six times above the safe threshold.
Levels as low as 0.05 ppm will leave brownish stains in sinks. It can appear as a floating film on the surface of standing water. You may also notice a black discoloration in your dishwasher, because detergents raise the pH of the water high enough (>8) to allow manganese to precipitate out of solution.
Similar to iron, manganese can be completely dissolved in water or is precipitated out of solution and makes water appear black straight from the tap. While a softener is able to remove dissolved manganese from water, many other factors (pH, presence of other minerals, and level of total dissolved solids (TDS)) can reduce the efficacy of this solution. Manganese removal is best removed using a specialty whole home filter. An EcoWater Pro can test your water and determine the best treatment solution for you.