F0/100
GRAFTON WATERWORKS — Water Quality Report 2026
Serving 12,269 people · Wisconsin
Water Source
Groundwater
County
—
System ID
WI2460111
Violations
135
Contaminant Test Results
2 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
1,4-dioxane | 2.37 µg/L | — | Above Goal |
Lead (90th percentile) | 0.003 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 GRAFTON WATERWORKS
Is GRAFTON WATERWORKS water safe to drink?
GRAFTON WATERWORKS water receives a grade of F (0/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 135 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has GRAFTON WATERWORKS detected?
66 contaminants were tested in GRAFTON WATERWORKS's water. Notable contaminants include Lead (90th percentile), 1,4-dioxane. No contaminants exceed EPA legal limits. 2 exceed EPA health goals (MCLGs).
Does GRAFTON WATERWORKS have any EPA violations?
Yes, GRAFTON WATERWORKS has 135 EPA violation(s) on record, with the most recent in 2008. Violation types include MR, Other, MCL. 2 are health-based violations.
How many people does GRAFTON WATERWORKS serve?
GRAFTON WATERWORKS serves approximately 12,269 people, Wisconsin. The system provides water to 1 community: Grafton.
What type of water does GRAFTON WATERWORKS provide?
GRAFTON WATERWORKS sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is WI2460111.
How does GRAFTON WATERWORKS compare to other utilities in Wisconsin?
GRAFTON WATERWORKS scores 0/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our Wisconsin state page for a full comparison of water systems.