MILES CITY, MT · Custer County
CUSTER CO WATER AND SEWER DIST Water System
Consumer Confidence Report status
CUSTER CO WATER AND SEWER DIST 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 CUSTER CO WATER AND SEWER DIST.
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)
- MT0003041
- System type
- Community Water System
- Population served
- 480
- Service connections
- 286
- Ownership
- local government
- Water source
- surface water (rivers, lakes, or reservoirs)
CUSTER CO WATER AND SEWER DIST is one of 1,084 community water systems in Montana in the 500 or fewer people size category, serving 480 people from surface water.
As of August 1, 2026, its federal record holds 3 entries between 1997 and 2015, all of which EPA lists as closed. Nothing has been added since 2015.
Of the 3, 2 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 Consumer Confidence Rule, the Lead and Copper Rule, and the Total Coliform Rules.
Violation history
Consumer Confidence Report Complete Failure to Report
—Consumer Confidence Rule
July 1, 2015 – July 22, 2015
ResolvedFollow-up Or Routine LCR Tap M/R
—Lead and Copper Rule
October 1, 2007 – August 19, 2009
ResolvedMonitoring, Routine Major (TCR)
—Coliform (TCR)
December 1, 1997 – December 31, 1997
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| July 1, 2015 – July 22, 2015 | Consumer Confidence Report Complete Failure to Report | Consumer Confidence Rule | — | Resolved |
| October 1, 2007 – August 19, 2009 | Follow-up Or Routine LCR Tap M/R | Lead and Copper Rule | — | Resolved |
| December 1, 1997 – December 31, 1997 | Monitoring, Routine Major (TCR) | Coliform (TCR) | — | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
- July 22, 2015State Compliance achieved1 linked violation
- August 19, 2009State Compliance achieved25 linked violations
- December 31, 2008State Compliance achieved3 linked violations
- January 15, 2008State Public Notification requested3 linked violations
- January 4, 2005State Violation/Reminder Notice9 linked violations
Common questions
Is CUSTER CO WATER AND SEWER DIST required to publish a Consumer Confidence Report?
- Yes. CUSTER CO WATER AND SEWER DIST 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 CUSTER CO WATER AND SEWER DIST’s next Consumer Confidence Report due?
- CUSTER CO WATER AND SEWER DIST’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does CUSTER CO WATER AND SEWER DIST have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for CUSTER CO WATER AND SEWER DIST.
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
CUSTER COUNTY WATER AND SEWER DIST
406-234-1803
MILES CITY, MT 59301