D25/100
BLACK HAWK WATER USER DISTRICT — Water Quality Report 2026
Serving 4,500 people · South Dakota
Water Source
Groundwater
County
—
System ID
SD4600043
Violations
56
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
No violations in the past 5 years
Full EPA compliance since 2017.
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 HAWK WATER USER DISTRICT
Is BLACK HAWK WATER USER DISTRICT water safe to drink?
BLACK HAWK WATER USER DISTRICT water receives a grade of D (25/100), which is considered poor. 0 contaminant(s) exceed EPA legal limits and 56 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has BLACK HAWK WATER USER DISTRICT detected?
31 contaminants were tested in BLACK HAWK WATER USER DISTRICT's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does BLACK HAWK WATER USER DISTRICT have any EPA violations?
Yes, BLACK HAWK WATER USER DISTRICT has 56 EPA violation(s) on record, with the most recent in 2017. Violation types include TT, MR, MCL. 4 are health-based violations.
How many people does BLACK HAWK WATER USER DISTRICT serve?
BLACK HAWK WATER USER DISTRICT serves approximately 4,500 people, South Dakota. The system provides water to 1 community: Black Hawk.
What type of water does BLACK HAWK WATER USER DISTRICT provide?
BLACK HAWK WATER USER DISTRICT sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is SD4600043.
How does BLACK HAWK WATER USER DISTRICT compare to other utilities in South Dakota?
BLACK HAWK WATER USER DISTRICT scores 25/100 with a grade of D (poor). This score suggests significant water quality concerns relative to other utilities. Visit our South Dakota state page for a full comparison of water systems.