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Miles City, MT Tap Water Quality 2026

Water quality report for Miles City, MT — PFAS, lead and copper results, violation history and state inspection findings from EPA SDWIS.

A look at Miles City's drinking water using EPA enforcement records: violations, lead and copper results, PFAS sampling and state inspection findings.

Main Utility: Miles City City Of PWSID: MT0000291 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 3.00 ppb, 20% of the action level and no violations are open. No PFAS was detected.

B

Miles City earns a B for water quality

Graded on violations, lead, and PFAS, with state inspection findings.

Lead: 3.00 ppb — 20% of the federal action level
PFAS tested, none detected
7 violations since 2015, 3 health-based
No violations currently open
Miles City's lead level vs. all Montana community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 3.00 ppb — 20% of the federal action level
✓ Lower lead than 43% of Montana utilities
Population Served
8022
~3724 connections
Water Source
Surface water
Drawn from surface water — SDWIS source code SW
Active Violations
0
7 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
20% of EPA action level
3.00 ppb
Action level: 15 ppb
The 90th-percentile lead result is 3.00 ppb, 20% of the 15 ppb federal action level. The action level is a treatment trigger, not a legal maximum, and it is measured across sampled taps rather than at any single home.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
Long Term 2 Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2025 Archived
Long Term 2 Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2025 Archived
Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2023 Archived
Surface Water Treatment Rule MONITORING AND REPORTING — — 2022 Resolved
Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2022 Resolved
Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2022 Resolved
Consumer Confidence Rule OTHER — — 2018 Resolved
Understanding violation types MCL violations mean a contaminant exceeded the federal maximum limit — the most serious type.
TT (Treatment Technique) violations mean required treatment procedures weren't followed, but don't necessarily mean contamination occurred.

Violation History

7 violations are on record since 2015, of which 3 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Miles City City Of
PWSID MT0000291
Water source Surface water — Drawn from surface water — SDWIS source code SW
Population served 8,022
Service connections 3,724
Systems serving this area 1
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Miles City tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 3.00 ppb, 20% of the action level.
Does Miles City water have PFAS? ▼
It was tested for the six regulated PFAS compounds and none were detected.
Who supplies water to Miles City? ▼
Miles City City Of (PWSID MT0000291). Surface water. Drawn from surface water — SDWIS source code SW
When was this system last inspected? ▼
It was last inspected on 2025-04-24. No significant deficiencies were recorded.

What Should Miles City Residents Do?

1
Read your annual water report
Your supplier publishes a Consumer Confidence Report each July covering the prior year.
2
Check for a lead service line
Lead reaches tap water mainly through service lines and household plumbing. Suppliers now publish an inventory identifying lead lines.
3
Flush before drinking
If water has sat in pipes more than six hours, run the cold tap for two minutes before drinking or cooking.

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