Public Water Partners

CHESTER, MT · Liberty County

CHESTER TOWN OF Water System

Consumer Confidence Report status

CHESTER TOWN OF must publish a Consumer Confidence Report — the annual drinking water quality report covering calendar year 2026 — by July 1, 2027.

As of August 1, 2026, EPA's federal records show 1 item for CHESTER TOWN OF that is open and awaiting resolution. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings.

Data sourced from the EPA ECHO database (SDWA bulk download), last refreshed August 1, 2026. This is a record-keeping and public-information tool — it does not replace Montana’s official records. Always confirm current status with Montana before making decisions based on this information.

System facts

System ID (PWSID)
MT0000173
System type
Community Water System
Population served
870
Service connections
495
Ownership
local government
Water source
surface water (rivers, lakes, or reservoirs)

CHESTER TOWN OF is one of 123 community water systems in Montana in the 501 to 3,300 people size category, serving 870 people from surface water.

As of August 1, 2026, its federal record holds 7 entries between 1993 and 2025, of which 1 remains open; none are health-based.

Of the 7, 5 are monitoring and reporting requirements — the category that accounts for about four in five of all violations in EPA's national dataset — rather than findings about the water itself. The record involves the Radionuclides and Revised Rad Rule, volatile organic chemicals, and the Lead and Copper Rule.

Violation history

  • Follow-up Or Routine LCR Tap M/R

    —

    Lead and Copper Rule

    October 1, 2025

    Unaddressed

  • Monitoring, Regular

    —

    Combined Radium (-226 and -228)

    January 1, 2017 – December 31, 2022

    Resolved

  • Monitoring, Regular

    —

    Gross Alpha, Excl. Radon and U

    January 1, 2017 – December 31, 2022

    Resolved

  • Monitoring, Regular

    —

    DICHLOROMETHANE

    July 1, 2015 – September 30, 2015

    Resolved

  • Monitoring, Regular

    —

    Xylenes, Total

    July 1, 2015 – September 30, 2015

    Resolved

  • Consumer Confidence Report Complete Failure to Report

    —

    Consumer Confidence Rule

    July 1, 2010 – July 27, 2010

    Resolved

  • Treatment Technique (SWTR and GWR)

    Health-based

    Surface Water Treatment Rule

    December 1, 1993 – December 31, 1993

    Resolved

Unaddressed no corrective action on record yetResolved addressed and confirmed by the state

Enforcement actions

Common questions

Is CHESTER TOWN OF required to publish a Consumer Confidence Report?

Yes. CHESTER TOWN OF is a community water system, and federal rules (40 CFR 141 Subpart O) require every community water system to publish a Consumer Confidence Report each year.

When is CHESTER TOWN OF’s next Consumer Confidence Report due?

CHESTER TOWN OF’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.

Does CHESTER TOWN OF have any open drinking water violations on record?

As of August 1, 2026, EPA's federal records show 1 item for CHESTER TOWN OF that is open and awaiting resolution. None are health-based violations — open items of this kind are most often monitoring or reporting requirements, not water-safety findings.

What is a Consumer Confidence Report?

A Consumer Confidence Report (CCR) is the annual drinking water quality report that community water systems must provide to the people they serve. It lists the contaminants detected in the system’s water during the year, where the water comes from, and how the results compare with federal limits. EPA’s revised CCR rule takes effect January 1, 2027, and the first reports in the new format are due July 1, 2027.

Contact

WICKUM, ASHLEY

406-759-5635

CHESTER, MT 59522