C42/100
HARDIN CITY OF — Water Quality Report 2026
Serving 3,500 people · Montana
Water Source
Surface Water
County
—
System ID
MT0000235
Violations
26
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Copper (90th percentile) | 2.13 mg/L | 1.30 mg/L | Over Limit |
EPA Violation History
2
Violations (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: April 1, 2025 – June 30, 2025Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
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: April 1, 2025 – June 30, 2025Rule: Stage 2 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 HARDIN CITY OF
Is HARDIN CITY OF water safe to drink?
HARDIN CITY OF water receives a grade of C (42/100), which is considered fair. 1 contaminant(s) exceed EPA legal limits and 26 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has HARDIN CITY OF detected?
52 contaminants were tested in HARDIN CITY OF's water. Notable contaminants include Copper (90th percentile). 1 exceed EPA legal limits (MCLs). 1 exceed EPA health goals (MCLGs).
Does HARDIN CITY OF have any EPA violations?
Yes, HARDIN CITY OF has 26 EPA violation(s) on record, with the most recent in 2025. Violation types include MR, Other, TT. 6 are health-based violations.
How many people does HARDIN CITY OF serve?
HARDIN CITY OF serves approximately 3,500 people, Montana. The system provides water to 1 community: Hardin.
What type of water does HARDIN CITY OF provide?
HARDIN 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 MT0000235.
How does HARDIN CITY OF compare to other utilities in Montana?
HARDIN CITY OF scores 42/100 with a grade of C (fair). This score indicates room for improvement compared to other utilities. Visit our Montana state page for a full comparison of water systems.