D21/100
QUISTORFF — Water Quality Report 2026
Serving 1,113 people · Washington
Water Source
Groundwater
County
—
System ID
WA5370550
Violations
40
Contaminant Test Results
3 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
PFHxS | 0.044 µg/L | 0.010 µg/L | Over Limit |
PFOS | 0.012 µg/L | 0.004 µg/L | Over Limit |
Lead (90th percentile) | 0.002 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2008.
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 QUISTORFF
Is QUISTORFF water safe to drink?
QUISTORFF water receives a grade of D (21/100), which is considered poor. 2 contaminant(s) exceed EPA legal limits and 40 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has QUISTORFF detected?
31 contaminants were tested in QUISTORFF's water. Notable contaminants include PFHxS, PFOS, Lead (90th percentile). 2 exceed EPA legal limits (MCLs). 3 exceed EPA health goals (MCLGs).
Does QUISTORFF have any EPA violations?
Yes, QUISTORFF has 40 EPA violation(s) on record, with the most recent in 2008. Violation types include MR, MCL. 5 are health-based violations.
How many people does QUISTORFF serve?
QUISTORFF serves approximately 1,113 people, Washington.
What type of water does QUISTORFF provide?
QUISTORFF sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is WA5370550.
How does QUISTORFF compare to other utilities in Washington?
QUISTORFF scores 21/100 with a grade of D (poor). This score suggests significant water quality concerns relative to other utilities. Visit our Washington state page for a full comparison of water systems.