
Below 15, the level that requires action
4 public water companies list Pewaukee as a place they supply. The biggest is the Pewaukee City Water and Sewer Utility, with about 8,671 people. The highest latest result among Pewaukee's water companies is 2.6 parts per billion, at the Pewaukee City Water and Sewer Utility. None of the 4 with results was above 15 at its latest test.