
Below 15, the level that requires action
2 public water companies list Erwin as a place they supply. The biggest is the Morningside Heights Water District / Erwin (T), with about 4,570 people. The highest latest result among Erwin's water companies is 5 parts per billion, at the Morningside Heights Water District / Erwin (T). None of the 2 with results was above 15 at its latest test.