A87/100
OCONTO FALLS WATERWORKS — Water Quality Report 2026
Serving 2,892 people · Wisconsin
Water Source
Groundwater
County
—
System ID
WI4430496
Violations
6
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
2
Violations (last 5yr)
0
Unresolved
1
Health-Related
TIER 3Resolved
Disinfection byproduct treatment technique failure
When: October 17, 2024 – June 12, 2025Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 2Resolved
Treatment technique violation
When: October 17, 2024 – May 26, 2025Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
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 OCONTO FALLS WATERWORKS
Is OCONTO FALLS WATERWORKS water safe to drink?
OCONTO FALLS WATERWORKS water receives a grade of A (87/100), 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 OCONTO FALLS WATERWORKS detected?
1 contaminants were tested in OCONTO FALLS WATERWORKS's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does OCONTO FALLS WATERWORKS have any EPA violations?
Yes, OCONTO FALLS WATERWORKS has 6 EPA violation(s) on record, with the most recent in 2024. Violation types include Other, TT, MR. 1 are health-based violations.
How many people does OCONTO FALLS WATERWORKS serve?
OCONTO FALLS WATERWORKS serves approximately 2,892 people, Wisconsin. The system provides water to 1 community: Oconto Falls.
What type of water does OCONTO FALLS WATERWORKS provide?
OCONTO FALLS WATERWORKS sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is WI4430496.
How does OCONTO FALLS WATERWORKS compare to other utilities in Wisconsin?
OCONTO FALLS WATERWORKS scores 87/100 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.