B77/100
BLACK ROCK UTILITIES INC — Water Quality Report 2026
Serving 1,014 people · Idaho
Water Source
Groundwater
County
—
System ID
ID1280290
Violations
16
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.004 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
1
Violation (last 5yr)
1
Unresolved
0
Health-Related
TIER 3Unresolved
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: July 1, 2022 – September 30, 2022Rule: Stage 1 DBPREnforcement: Informal — resolved cooperativelyVerify on EPA.gov
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 ROCK UTILITIES INC
Is BLACK ROCK UTILITIES INC water safe to drink?
BLACK ROCK UTILITIES INC water receives a grade of B (77/100), 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 ROCK UTILITIES INC detected?
1 contaminants were tested in BLACK ROCK UTILITIES INC's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does BLACK ROCK UTILITIES INC have any EPA violations?
Yes, BLACK ROCK UTILITIES INC has 16 EPA violation(s) on record, with the most recent in 2022. Violation types include MR, MON, MCL. 1 are health-based violations.
How many people does BLACK ROCK UTILITIES INC serve?
BLACK ROCK UTILITIES INC serves approximately 1,014 people, Idaho.
What type of water does BLACK ROCK UTILITIES INC provide?
BLACK ROCK UTILITIES INC sources its water from groundwater. Groundwater is pumped from underground aquifers, which often provides natural filtration. The utility's system ID is ID1280290.
How does BLACK ROCK UTILITIES INC compare to other utilities in Idaho?
BLACK ROCK UTILITIES INC scores 77/100 with a grade of B (good). This is an above-average performance for utilities statewide. Visit our Idaho state page for a full comparison of water systems.