Drinking Water Systems in Issaquah, Washington
4 water systems are reported for this city, with a combined service population of 43,739. The systems have 9 EPA violation records in the five-year period ending June 30, 2026.
Water Systems Serving Issaquah
TIGER MTN TRACTS
30 served121 historical records6 recent
C
ALPINE MOBILE MANOR
45 served7 historical records2 recent
B
ISSAQUAH WATER SYSTEM
43,584 served172 historical records
A
ISSAQUAH VALLEY WATER ASSN #1
80 served22 historical records1 recent
B
EPA Contaminant Categories in Historical Violation Records
Coliform (TCR)38 records
Consumer Confidence Rule12 records
Pentachlorophenol10 records
Nitrate9 records
Benzene8 records
OXAMYL8 records
Aldicarb sulfone8 records
Aldicarb8 records
Aldicarb sulfoxide8 records
Carbofuran8 records
Category counts aggregate historical compliance records across listed systems. They do not show current concentrations or household test results.