Drinking Water Systems in ONTARIO, Ohio
1 water system are reported for this city, with a combined service population of 6,756. The systems have 1 EPA violation record in the five-year period ending June 30, 2026.
Water Systems Serving ONTARIO
EPA Contaminant Categories in Historical Violation Records
Consumer Confidence Rule2 records
Asbestos1 record
Arsenic1 record
Barium1 record
Cadmium1 record
Chromium1 record
Fluoride1 record
Selenium1 record
Nickel1 record
Thallium1 record
Category counts aggregate historical compliance records across listed systems. They do not show current concentrations or household test results.