
Below 15, the level that requires action
9 public water companies list Hempstead as a place they supply. The biggest is the Liberty Utilities New York - Lynbrook, with about 220,000 people. The highest latest result among Hempstead's water companies is 5 parts per billion, at the Liberty Utilities New York - Lynbrook. None of the 9 with results was above 15 at its latest test. 3 found too little lead to measure.