They are constructing a supply that will tap Lake Huron.
Lakes Superior, Michigan and Huron are not especially polluted. The little inland lakes vary, but they end up having a lot of trouble with residential inputs (fertilizer runoff and (historically) sewage).
Lakes Superior, Michigan and Huron are not especially polluted. The little inland lakes vary, but they end up having a lot of trouble with residential inputs (fertilizer runoff and (historically) sewage).