A93/100
SAUK CITY WATERWORKS — Water Quality Report 2026
Serving 3,518 people · Wisconsin
Water Source
Groundwater
County
—
System ID
WI1570105
Violations
4
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.006 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
2
Violations (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2024 – August 9, 2024Enforcement: Resolving — corrective action underway
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2024 – August 9, 2024Enforcement: 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 SAUK CITY WATERWORKS
Is SAUK CITY WATERWORKS water safe to drink?
SAUK CITY WATERWORKS water receives a grade of A (93/100), which is considered excellent. Out of 31 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has SAUK CITY WATERWORKS detected?
31 contaminants were tested in SAUK CITY WATERWORKS's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does SAUK CITY WATERWORKS have any EPA violations?
Yes, SAUK CITY WATERWORKS has 4 EPA violation(s) on record, with the most recent in 2024. Violation types include Other, MR.
How many people does SAUK CITY WATERWORKS serve?
SAUK CITY WATERWORKS serves approximately 3,518 people, Wisconsin. The system provides water to 1 community: Sauk City.
What type of water does SAUK CITY WATERWORKS provide?
SAUK CITY WATERWORKS sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is WI1570105.
How does SAUK CITY WATERWORKS compare to other utilities in Wisconsin?
SAUK CITY WATERWORKS scores 93/100 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.