Manganese in Well Water

Manganese occurs naturally in Nova Scotia groundwater and exposure to manganese can have neurological effects, especially in infants. The Health Canada Maximum Acceptable Concentration for manganese in well water is 0.12 mg/L (or 120 µg/L), and the aesthetic objective is 0.02 mg/L (or 20 µg/L).

Manganese in Well Water Risk Map

An Open File Report was produced to develop an understanding of the factors controlling the distribution of manganese in groundwater, and to develop a province-wide manganese in well water risk map based on the province's geology. The purpose of the risk map is to communicate the risk of manganese in domestic private well drinking water, and to encourage routine water testing and appropriate treatment which will lead to improved health outcomes. The risk map is available as a web map application, and divides the province into low-, medium- and high-risk zones.

Private Well Owners

About 42% of Nova Scotians rely on private wells, and it is estimated that almost 1 in 4 of these private well users may have unsafe levels of manganese in their untreated water.Testing your well water is the only way to find out whether manganese is a concern in your well, so it is important to test your water no matter where you live. Well water should be tested every two years for chemicals, such as manganese, to ensure that it is safe for you and your family to drink. More information on manganese and well testing and treatment for private well owners can be found here.

A story map is also available, which brings together knowledge and resources for private well owners looking for information about drinking water hazards to private wells and how to test and interpret their drinking water quality.