A92/100
OOSTBURG WATERWORKS — Water Quality Report 2026
Serving 3,110 people · Wisconsin
Water Source
Groundwater
County
—
System ID
WI4600445
Violations
5
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.011 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2002.
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 OOSTBURG WATERWORKS
Is OOSTBURG WATERWORKS water safe to drink?
OOSTBURG WATERWORKS water receives a grade of A (92/100), which is considered excellent. Out of 1 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has OOSTBURG WATERWORKS detected?
1 contaminants were tested in OOSTBURG WATERWORKS's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does OOSTBURG WATERWORKS have any EPA violations?
Yes, OOSTBURG WATERWORKS has 5 EPA violation(s) on record, with the most recent in 2002. Violation types include Other, MR.
How many people does OOSTBURG WATERWORKS serve?
OOSTBURG WATERWORKS serves approximately 3,110 people, Wisconsin. The system provides water to 1 community: Oostburg.
What type of water does OOSTBURG WATERWORKS provide?
OOSTBURG WATERWORKS sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is WI4600445.
How does OOSTBURG WATERWORKS compare to other utilities in Wisconsin?
OOSTBURG WATERWORKS scores 92/100 with a grade of A (excellent). This places it among the higher-performing utilities in the state. Visit our Wisconsin state page for a full comparison of water systems.