Drinking Water Systems in SEATTLE, Washington
7 water systems are reported for this city, with a combined service population of 1,244,768. The systems have 2 EPA violation records in the five-year period ending June 30, 2026.
Water Systems Serving SEATTLE
KING COUNTY WATER DISTRICT #125
21,904 served2 historical records1 recent
B
SEATTLE PUBLIC UTILITIES
1,161,961 served4 historical records
A
Majestic Oaks Water System
28 served9 historical records
A
SKYWAY WATER & SEWER
12,036 served4 historical records
A
Ravenwing Ranch
250 served0 historical records
A
CHERRYWOOD MOBILE HOME MANOR
120 served83 historical records1 recent
B
KING COUNTY WATER DISTRICT #20
48,469 served2 historical records
A
EPA Contaminant Categories in Historical Violation Records
Coliform (TCR)7 records
Nitrate6 records
Total Trihalomethanes (TTHMs)5 records
Haloacetic Acids (HAA5)5 records
Gross Alpha3 records
Selenium3 records
Cadmium3 records
Chromium3 records
Barium3 records
Thallium3 records
Category counts aggregate historical compliance records across listed systems. They do not show current concentrations or household test results.