
Below 15, the level that requires action
10 public water companies list Oyster Bay as a place they supply. The biggest is the Jericho Water District, with about 58,000 people. The highest latest result among Oyster Bay's water companies is 5.7 parts per billion, at the Oyster Bay Water District. None of the 10 with results was above 15 at its latest test. 5 found too little lead to measure.