A92/100
GRANTSBURG WATERWORKS — Water Quality Report 2026
Serving 1,460 people · Wisconsin
Water Source
Groundwater
County
—
System ID
WI8070310
Violations
5
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.002 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
5
Violations (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Reporting Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 2, 2025 – July 29, 2025Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Violation related to Turbidity
When: August 24, 2022 – November 30, 2022Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Violation related to Turbidity
When: August 24, 2022 – November 30, 2022Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Violation related to Turbidity
When: August 24, 2022 – November 30, 2022Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Failed to issue initial public notification
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: January 1, 2022 – July 12, 2022Rule: 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 GRANTSBURG WATERWORKS
Is GRANTSBURG WATERWORKS water safe to drink?
GRANTSBURG WATERWORKS water receives a grade of A (92/100), 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 GRANTSBURG WATERWORKS detected?
1 contaminants were tested in GRANTSBURG WATERWORKS's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does GRANTSBURG WATERWORKS have any EPA violations?
Yes, GRANTSBURG WATERWORKS has 5 EPA violation(s) on record, with the most recent in 2025. Violation types include RPT, Other, MR.
How many people does GRANTSBURG WATERWORKS serve?
GRANTSBURG WATERWORKS serves approximately 1,460 people, Wisconsin. The system provides water to 1 community: Grantsburg.
What type of water does GRANTSBURG WATERWORKS provide?
GRANTSBURG WATERWORKS sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is WI8070310.
How does GRANTSBURG WATERWORKS compare to other utilities in Wisconsin?
GRANTSBURG WATERWORKS scores 92/100 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.