Manganese in water can leave black stains on bathroom and kitchen fixtures. US EPA has recognized magnesium concentrations in excess of 0.05 ppm (mg/L) as troublesome for both homes and businesses.
Manganese in water can leave black stains on bathroom and kitchen fixtures. US EPA has recognized magnesium concentrations in excess of 0.05 ppm (mg/L) as troublesome for both homes and businesses.