💧 ZIP Water Report

Tap water in Castle Rock, WA — ZIP 98611

1 public water system serving about 4,367 people.

A
Excellent

Water systems serving 98611

Castle Rock Municipal Water
PWSID WA5311800 · serves 4,367 · surface water
0 health-based / 3 total violations (5 yrs)
A

Grades summarize EPA SDWIS violation records (last 5 years) and UCMR 5 PFAS results. They are informational, not a health determination. Methodology