A90/100
NEILLSVILLE WATERWORKS — Water Quality Report 2026
Serving 2,384 people · Wisconsin
Water Source
Groundwater
County
—
System ID
WI6100330
Violations
7
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.001 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
3
Violations (last 5yr)
1
Unresolved
0
Health-Related
TIER 3Unresolved
Reporting Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2022 – July 11, 2022Enforcement: Resolving — corrective action underway
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2022 – July 11, 2022Enforcement: 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 NEILLSVILLE WATERWORKS
Is NEILLSVILLE WATERWORKS water safe to drink?
NEILLSVILLE WATERWORKS water receives a grade of A (90/100), 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 NEILLSVILLE WATERWORKS detected?
1 contaminants were tested in NEILLSVILLE WATERWORKS's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does NEILLSVILLE WATERWORKS have any EPA violations?
Yes, NEILLSVILLE WATERWORKS has 7 EPA violation(s) on record, with the most recent in 2025. Violation types include RPT, Other, MR.
How many people does NEILLSVILLE WATERWORKS serve?
NEILLSVILLE WATERWORKS serves approximately 2,384 people, Wisconsin. The system provides water to 1 community: Neillsville.
What type of water does NEILLSVILLE WATERWORKS provide?
NEILLSVILLE WATERWORKS sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is WI6100330.
How does NEILLSVILLE WATERWORKS compare to other utilities in Wisconsin?
NEILLSVILLE WATERWORKS scores 90/100 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.