
Below 15, the level that requires action
5 public water companies list Castleton as a place they supply. The biggest is the Castleton Fire District 1, with about 1,940 people. The highest latest result among Castleton's water companies is 12.5 parts per billion, at the Castleton Fire District 3. None of the 5 with results was above 15 at its latest test. 2 found too little lead to measure. 3 are small systems serving fewer than 500 people each, such as a mobile home park, a subdivision or a business with its own well.