D25/100
MILES CITY CITY OF — Water Quality Report 2026
Serving 9,565 people · Montana
Water Source
Surface Water
County
—
System ID
MT0000291
Violations
40
Contaminant Test Results
1 contaminant above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
Lead (90th percentile) | 0.003 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
6
Violations (last 5yr)
3
Unresolved
3
Health-Related
TIER 3Unresolved
Failed to complete routine monitoring
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: August 1, 2025 – August 31, 2025Rule: Surface Water Treatment RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 3Unresolved
Failed to complete routine monitoring
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 1, 2025 – July 31, 2025Rule: Surface Water Treatment RuleEnforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 2Unresolved
Failed treatment technique requirements
When: August 1, 2023 – August 31, 2023Rule: Surface Water Treatment RuleEnforcement: Formal — state order issuedVerify on EPA.gov
TIER 3Resolved
Failed to complete routine monitoring
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: December 1, 2022 – December 31, 2022Rule: Surface Water Treatment RuleEnforcement: Resolving — corrective action underway
TIER 2Resolved
Failed treatment technique requirements
When: September 1, 2022 – September 30, 2022Rule: Surface Water Treatment RuleEnforcement: Resolving — corrective action underway
TIER 2Resolved
Failed treatment technique requirements
When: August 1, 2022 – August 31, 2022Rule: Surface Water Treatment RuleEnforcement: 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 MILES CITY CITY OF
Is MILES CITY CITY OF water safe to drink?
MILES CITY CITY OF water receives a grade of D (25/100), which is considered poor. 0 contaminant(s) exceed EPA legal limits and 40 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has MILES CITY CITY OF detected?
51 contaminants were tested in MILES CITY CITY OF's water. Notable contaminants include Lead (90th percentile). No contaminants exceed EPA legal limits. 1 exceed EPA health goals (MCLGs).
Does MILES CITY CITY OF have any EPA violations?
Yes, MILES CITY CITY OF has 40 EPA violation(s) on record, with the most recent in 2025. Violation types include MR, TT, Other. 8 are health-based violations.
How many people does MILES CITY CITY OF serve?
MILES CITY CITY OF serves approximately 9,565 people, Montana. The system provides water to 1 community: Miles City.
What type of water does MILES CITY CITY OF provide?
MILES CITY 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 MT0000291.
How does MILES CITY CITY OF compare to other utilities in Montana?
MILES CITY CITY OF scores 25/100 with a grade of D (poor). This score suggests significant water quality concerns relative to other utilities. Visit our Montana state page for a full comparison of water systems.