What is the Water Concentration Where Manganese Becomes a Health Risk ?
As stated in the introduction, manganese concentrations below 0.5 mg/l are not a health concern even though they may cause the water to look, taste, or smell unusual. The CT AL of 0.5 mg/l is set well below any health effect level and thus provides a margin of safety. You should consider treating the water to reduce the manganese concentration if it is above the AL. This will ensure that an adequate margin of safety exists to protect you and your family. What Are the Background or Normal Levels of Manganese in Groundwater? The level of manganese in groundwater from natural leaching processes can vary widely depending upon the types of rock and minerals present at the water table. Typically, manganese concentrations from natural processes are low but can range up to 1.5 mg/l or higher. Sources of pollution rich in organic matter (e.g., runoff from landfills, compost, brush or silage piles, or chemicals such as gasoline) can add to the background level by increasing manganese release fro
