Is there lead in Londonderry's tap water?
4PPBLead in Londonderry's water at the latest test, from 2015 to 2017
Below 15, the level that requires action
Below 15, the level that requires action
16 public water companies list Londonderry as a place they supply. The biggest is Londonderry's water department, with about 6,255 people. The highest latest result among Londonderry's water companies is 225 parts per billion, at Rolling Meadows Condos III. 1 of them was above 15 at their latest test. 14 have no lead test results on file. 14 are small systems serving fewer than 500 people each, such as a mobile home park, a subdivision or a business with its own well.