B76/100
SUPERIOR WATER LIGHT & POWER COMPANY — Water Quality Report 2026
Serving 26,084 people · Wisconsin
Water Source
Surface Water
County
—
System ID
WI8160147
Violations
9
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)
1
Unresolved
1
Health-Related
TIER 2Resolved
Treatment technique violation
When: October 17, 2024 – March 24, 2025Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Unresolved
Disinfection byproduct treatment technique failure
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 SUPERIOR WATER LIGHT & POWER COMPANY
Is SUPERIOR WATER LIGHT & POWER COMPANY water safe to drink?
SUPERIOR WATER LIGHT & POWER COMPANY water receives a grade of B (76/100), which is considered good. Out of 69 contaminants tested, none exceed EPA legal limits. 1 contaminant(s) exceed non-enforceable health goals. The water meets federal safety standards.
What contaminants has SUPERIOR WATER LIGHT & POWER COMPANY detected?
69 contaminants were tested in SUPERIOR WATER LIGHT & POWER COMPANY's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does SUPERIOR WATER LIGHT & POWER COMPANY have any EPA violations?
Yes, SUPERIOR WATER LIGHT & POWER COMPANY has 9 EPA violation(s) on record, with the most recent in 2024. Violation types include TT, Other, MCL. 3 are health-based violations.
How many people does SUPERIOR WATER LIGHT & POWER COMPANY serve?
SUPERIOR WATER LIGHT & POWER COMPANY serves approximately 26,084 people, Wisconsin. The system provides water to 1 community: Superior.
What type of water does SUPERIOR WATER LIGHT & POWER COMPANY provide?
SUPERIOR WATER LIGHT & POWER COMPANY sources its water from surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is WI8160147.
How does SUPERIOR WATER LIGHT & POWER COMPANY compare to other utilities in Wisconsin?
SUPERIOR WATER LIGHT & POWER COMPANY scores 76/100 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.