F19/100
RAINIER WATER DEPARTMENT — Water Quality Report 2026
Serving 2,758 people · Washington
Water Source
Groundwater
County
—
System ID
WA5370980
Violations
66
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 2.22 mg/L | 1.30 mg/L | Over Limit |
Lead (90th percentile) | 0.003 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
1
Unresolved
0
Health-Related
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Frequently Asked Questions About RAINIER WATER DEPARTMENT
Is RAINIER WATER DEPARTMENT water safe to drink?
RAINIER WATER DEPARTMENT water receives a grade of F (19/100), which is considered failing. 1 contaminant(s) exceed EPA legal limits and 66 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has RAINIER WATER DEPARTMENT detected?
2 contaminants were tested in RAINIER WATER DEPARTMENT's water. Notable contaminants include Copper (90th percentile), Lead (90th percentile). 1 exceed EPA legal limits (MCLs). 2 exceed EPA health goals (MCLGs).
Does RAINIER WATER DEPARTMENT have any EPA violations?
Yes, RAINIER WATER DEPARTMENT has 66 EPA violation(s) on record, with the most recent in 2025. Violation types include Other, MR, MCL. 1 are health-based violations.
How many people does RAINIER WATER DEPARTMENT serve?
RAINIER WATER DEPARTMENT serves approximately 2,758 people, Washington.
What type of water does RAINIER WATER DEPARTMENT provide?
RAINIER WATER DEPARTMENT sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is WA5370980.
How does RAINIER WATER DEPARTMENT compare to other utilities in Washington?
RAINIER WATER DEPARTMENT scores 19/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our Washington state page for a full comparison of water systems.