Drinking Water Systems in DERRY, Pennsylvania
1 water system are reported for this city, with a combined service population of 6,500. The systems have 7 EPA violation records in the five-year period ending June 30, 2026.
Water Systems Serving DERRY
EPA Contaminant Categories in Historical Violation Records
Surface Water Treatment Rule18 records
CARBON, TOTAL16 records
Interim Enhanced Surface Water Treatment Rule10 records
Chlorine5 records
Public Notice5 records
Selenium5 records
Arsenic4 records
Total Trihalomethanes (TTHMs)3 records
Revised Total Coliform Rule3 records
Thallium3 records
Category counts aggregate historical compliance records across listed systems. They do not show current concentrations or household test results.