Drinking Water Systems in MASON CITY, Illinois
1 water system are reported for this city, with a combined service population of 2,393. The systems have 1 EPA violation record in the five-year period ending June 30, 2026.
Water Systems Serving MASON CITY
EPA Contaminant Categories in Historical Violation Records
Arsenic14 records
LEAD AND COPPER RULE REVISIONS1 record
Gross Alpha1 record
Category counts aggregate historical compliance records across listed systems. They do not show current concentrations or household test results.