F9/100
SHERWOOD WATERWORKS — Water Quality Report 2026
Serving 3,114 people · Wisconsin
Water Source
Purchased Surface Water
County
—
System ID
WI4080271
Violations
35
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 1.80 mg/L | 1.30 mg/L | Over Limit |
EPA Violation History
3
Violations (last 5yr)
0
Unresolved
1
Health-Related
TIER 2Resolved
Treatment technique violation
When: October 17, 2024 – August 25, 2025Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Disinfection byproduct treatment technique failure
When: October 17, 2024 – June 30, 2025Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Surface water treatment technique failure
When: October 1, 2024 – July 15, 2025Enforcement: 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 SHERWOOD WATERWORKS
Is SHERWOOD WATERWORKS water safe to drink?
SHERWOOD WATERWORKS water receives a grade of F (9/100), which is considered failing. 1 contaminant(s) exceed EPA legal limits and 35 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has SHERWOOD WATERWORKS detected?
2 contaminants were tested in SHERWOOD WATERWORKS's water. Notable contaminants include Copper (90th percentile). 1 exceed EPA legal limits (MCLs). 1 exceed EPA health goals (MCLGs).
Does SHERWOOD WATERWORKS have any EPA violations?
Yes, SHERWOOD WATERWORKS has 35 EPA violation(s) on record, with the most recent in 2024. Violation types include TT, Other, MR. 12 are health-based violations.
How many people does SHERWOOD WATERWORKS serve?
SHERWOOD WATERWORKS serves approximately 3,114 people, Wisconsin. The system provides water to 1 community: Sherwood.
What type of water does SHERWOOD WATERWORKS provide?
SHERWOOD WATERWORKS sources its water from purchased surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is WI4080271.
How does SHERWOOD WATERWORKS compare to other utilities in Wisconsin?
SHERWOOD WATERWORKS scores 9/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our Wisconsin state page for a full comparison of water systems.