
Below 15, the level that requires action
3 public water companies list North Caldwell as a place they supply. The biggest is Nj American Water - Short Hills, with about 217,230 people. The highest latest result among North Caldwell's water companies is 3.9 parts per billion, at North Caldwell Water Dep. None of the 3 with results was above 15 at its latest test. 1 found too little lead to measure.