
Below 15, the level that requires action
6 public water companies list Lead as a place they supply. The biggest is Lead's water department, with about 2,982 people. The highest latest result among Lead's water companies is 4 parts per billion, at the Terry Trojan Water District. None of the 6 with results was above 15 at its latest test. 5 are small systems serving fewer than 500 people each, such as a mobile home park, a subdivision or a business with its own well.