B70/100
BLACK EARTH WATERWORKS — Water Quality Report 2026
Serving 1,493 people · Wisconsin
Water Source
Groundwater
County
—
System ID
WI1130211
Violations
11
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
2
Violations (last 5yr)
1
Unresolved
1
Health-Related
TIER 2Resolved
Treatment technique violation
When: October 17, 2024 – June 12, 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 BLACK EARTH WATERWORKS
Is BLACK EARTH WATERWORKS water safe to drink?
BLACK EARTH WATERWORKS water receives a grade of B (70/100), which is considered good. 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 BLACK EARTH WATERWORKS detected?
1 contaminants were tested in BLACK EARTH WATERWORKS's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does BLACK EARTH WATERWORKS have any EPA violations?
Yes, BLACK EARTH WATERWORKS has 11 EPA violation(s) on record, with the most recent in 2024. Violation types include TT, Other, MR. 4 are health-based violations.
How many people does BLACK EARTH WATERWORKS serve?
BLACK EARTH WATERWORKS serves approximately 1,493 people, Wisconsin. The system provides water to 1 community: Black Earth.
What type of water does BLACK EARTH WATERWORKS provide?
BLACK EARTH WATERWORKS sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is WI1130211.
How does BLACK EARTH WATERWORKS compare to other utilities in Wisconsin?
BLACK EARTH WATERWORKS scores 70/100 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.