
Below 15, the level that requires action
8 public water companies list North Hempstead as a place they supply. The biggest is Wa of Western Nassau, with about 120,000 people. The highest latest result among North Hempstead's water companies is 3 parts per billion, at Wa of Great Neck North. None of the 8 with results was above 15 at its latest test. 2 found too little lead to measure.