Is PIONEER WATER SERVICE required to publish a Consumer Confidence Report?

Yes. PIONEER WATER SERVICE 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 PIONEER WATER SERVICE’s next Consumer Confidence Report due?

PIONEER WATER SERVICE’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.

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.

BILLINGS, MT · Yellowstone County

PIONEER WATER SERVICE Water System

Consumer Confidence Report status

PIONEER WATER SERVICE 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 no open violations for PIONEER WATER SERVICE.

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): MT0004226
System type: Community Water System
Population served: 900
Service connections: 1
Ownership: privately owned
Water source: surface water (rivers, lakes, or reservoirs)

PIONEER WATER SERVICE is one of 123 community water systems in Montana in the 501 to 3,300 people size category, serving 900 people from surface water.

As of August 1, 2026, its federal record holds 2 entries between 2021 and 2024, all of which EPA lists as closed.

Of the 2, 1 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 Lead and Copper Rule and the Consumer Confidence Rule.

Violation history

Follow-up Or Routine LCR Tap M/R
—
Lead and Copper Rule
October 1, 2024 – September 23, 2025
Resolved
Consumer Confidence Report Complete Failure to Report
—
Consumer Confidence Rule
July 1, 2021 – June 22, 2022
Resolved

Resolved addressed and confirmed by the state

Period	Violation	Contaminant / rule	Health-based	Status
October 1, 2024 – September 23, 2025	Follow-up Or Routine LCR Tap M/R	Lead and Copper Rule	—	Resolved
July 1, 2021 – June 22, 2022	Consumer Confidence Report Complete Failure to Report	Consumer Confidence Rule	—	Resolved

Resolved addressed and confirmed by the state

Enforcement actions

September 23, 2025State Compliance achieved1 linked violation
February 4, 2025State Public Notification requested1 linked violation
February 4, 2025State Violation/Reminder Notice1 linked violation
June 22, 2022State Compliance achieved1 linked violation
January 7, 2022State Compliance achieved1 linked violation
January 4, 2022State Violation/Reminder Notice1 linked violation
July 19, 2021State Violation/Reminder Notice1 linked violation
September 29, 2020State Compliance achieved1 linked violation
July 20, 2020State Violation/Reminder Notice1 linked violation
July 23, 2019State Compliance achieved1 linked violation
July 17, 2019State Violation/Reminder Notice1 linked violation
October 4, 2018State Public Notification received1 linked violation
July 31, 2018State Compliance achieved1 linked violation
July 16, 2018State Violation/Reminder Notice1 linked violation
July 16, 2018State Public Notification requested1 linked violation
August 21, 2017State Compliance achieved1 linked violation
August 16, 2017State Public Notification requested1 linked violation
August 16, 2017State Violation/Reminder Notice1 linked violation
November 23, 2012State Compliance achieved2 linked violations
November 14, 2012State Violation/Reminder Notice1 linked violation
July 12, 2012State Violation/Reminder Notice1 linked violation
July 12, 2012State Public Notification requested1 linked violation
October 20, 2010State Violation/Reminder Notice1 linked violation
October 20, 2010State Public Notification requested1 linked violation
October 4, 2010State Compliance achieved1 linked violation
August 12, 2009State Compliance achieved3 linked violations
November 7, 2008State no additional Formal Action needed3 linked violations
October 22, 2008State Compliance achieved1 linked violation
February 5, 2007State Violation/Reminder Notice1 linked violation
June 6, 2006State Public Notification received1 linked violation
April 18, 2006State Violation/Reminder Notice1 linked violation
April 18, 2006State Public Notification requested1 linked violation
February 5, 2004State Compliance achieved2 linked violations

Common questions

Is PIONEER WATER SERVICE required to publish a Consumer Confidence Report?: Yes. PIONEER WATER SERVICE 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 PIONEER WATER SERVICE’s next Consumer Confidence Report due?: PIONEER WATER SERVICE’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does PIONEER WATER SERVICE have any open drinking water violations on record?: As of August 1, 2026, EPA's federal records show no open violations for PIONEER WATER SERVICE.
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

LORENZ, CHAD A

406-252-8860

BILLINGS, MT 59101