Drinking Water Systems in Mattawa, Washington
3 water systems are reported for this city, with a combined service population of 5,716. The systems have 9 EPA violation records in the five-year period ending June 30, 2026.
Water Systems Serving Mattawa
EPA Contaminant Categories in Historical Violation Records
Coliform (TCR)44 records
Nitrate21 records
Cadmium10 records
Fluoride10 records
Chromium10 records
Selenium10 records
Barium10 records
Arsenic10 records
Nickel9 records
Thallium9 records
Category counts aggregate historical compliance records across listed systems. They do not show current concentrations or household test results.