
Below 15, the level that requires action
2 public water companies list Henning as a place they supply. The biggest is West Tn State Penitentiary, with about 3,250 people. The highest latest result among Henning's water companies is 1.1 parts per billion, at West Tn State Penitentiary. None of the 2 with results was above 15 at its latest test.