
Below 15, the level that requires action
2 public water companies list Waukesha as a place they supply. The biggest is the Waukesha Water Utility, with about 70,718 people. The highest latest result among Waukesha's water companies is 3.1 parts per billion, at Schoenstatt Sisters of Mary. None of the 2 with results was above 15 at its latest test.