
Below 15, the level that requires action
2 public water companies list Mandan as a place they supply. The biggest is Mandan's water department, with about 21,769 people. The highest latest result among Mandan's water companies is 4.2 parts per billion, at Mandan's water department. None of the 2 with results was above 15 at its latest test. 1 found too little lead to measure.