F1/100
BLACK HAWK CITY OF — Water Quality Report 2026
Serving 15,167 people · Colorado
Water Source
Surface Water
County
—
System ID
CO0124147
Violations
96
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
1
Violation (last 5yr)
0
Unresolved
0
Health-Related
TIER 3Resolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: September 1, 2021 – September 30, 2021Rule: Stage 1 DBPREnforcement: 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 BLACK HAWK CITY OF
Is BLACK HAWK CITY OF water safe to drink?
BLACK HAWK CITY OF water receives a grade of F (1/100), which is considered failing. 0 contaminant(s) exceed EPA legal limits and 96 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has BLACK HAWK CITY OF detected?
69 contaminants were tested in BLACK HAWK CITY OF's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does BLACK HAWK CITY OF have any EPA violations?
Yes, BLACK HAWK CITY OF has 96 EPA violation(s) on record, with the most recent in 2021. Violation types include MR, MON.
How many people does BLACK HAWK CITY OF serve?
BLACK HAWK CITY OF serves approximately 15,167 people, Colorado.
What type of water does BLACK HAWK CITY OF provide?
BLACK HAWK CITY OF 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 CO0124147.
How does BLACK HAWK CITY OF compare to other utilities in Colorado?
BLACK HAWK CITY OF scores 1/100 with a grade of F (failing). This score suggests significant water quality concerns relative to other utilities. Visit our Colorado state page for a full comparison of water systems.