
Below 15, the level that requires action
2 public water companies list Doon as a place they supply. The biggest is Lyon-Sioux Rws-Doon, with about 1,765 people. The highest latest result among Doon's water companies is 4 parts per billion, at Lyon-Sioux Rws-Doon. None of the 2 with results was above 15 at its latest test.