B64/100
WATERLOO WATERWORKS — Water Quality Report 2026
Serving 3,520 people · Wisconsin
Water Source
Groundwater
County
—
System ID
WI1280115
Violations
13
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
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Monitoring / Reporting Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 1, 2023 – November 2, 2023Rule: 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 WATERLOO WATERWORKS
Is WATERLOO WATERWORKS water safe to drink?
WATERLOO WATERWORKS water receives a grade of B (64/100), which is considered good. Out of 51 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has WATERLOO WATERWORKS detected?
51 contaminants were tested in WATERLOO WATERWORKS's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does WATERLOO WATERWORKS have any EPA violations?
Yes, WATERLOO WATERWORKS has 13 EPA violation(s) on record, with the most recent in 2023. Violation types include MR, TT, Other. 5 are health-based violations.
How many people does WATERLOO WATERWORKS serve?
WATERLOO WATERWORKS serves approximately 3,520 people, Wisconsin. The system provides water to 1 community: Waterloo.
What type of water does WATERLOO WATERWORKS provide?
WATERLOO WATERWORKS sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is WI1280115.
How does WATERLOO WATERWORKS compare to other utilities in Wisconsin?
WATERLOO WATERWORKS scores 64/100 with a grade of B (good). This is an above-average performance for utilities statewide. Visit our Wisconsin state page for a full comparison of water systems.