BILLINGS, MT · Yellowstone County
BILLINGS CITY OF Water System
Consumer Confidence Report status
BILLINGS CITY 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 no open violations for BILLINGS CITY OF.
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)
- MT0000153
- System type
- Community Water System
- Population served
- 114,000
- Service connections
- 33,575
- Ownership
- local government
- Water source
- surface water (rivers, lakes, or reservoirs)
BILLINGS CITY OF is the largest community water system in Montana, serving 114,000 people from surface water.
As of August 1, 2026, its federal record holds 3 entries between 1993 and 1998, all of which EPA lists as closed. Nothing has been added since 1998.
All 3 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 Total Coliform Rules.
Violation history
Monitoring, Routine Minor (TCR)
—Coliform (TCR)
November 1, 1998 – November 30, 1998
ResolvedMonitoring, Routine Minor (TCR)
—Coliform (TCR)
August 1, 1998 – August 31, 1998
ResolvedMonitoring, Routine Minor (TCR)
—Coliform (TCR)
August 1, 1993 – August 31, 1993
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| November 1, 1998 – November 30, 1998 | Monitoring, Routine Minor (TCR) | Coliform (TCR) | — | Resolved |
| August 1, 1998 – August 31, 1998 | Monitoring, Routine Minor (TCR) | Coliform (TCR) | — | Resolved |
| August 1, 1993 – August 31, 1993 | Monitoring, Routine Minor (TCR) | Coliform (TCR) | — | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
No enforcement actions on record for this system.
Common questions
Is BILLINGS CITY OF required to publish a Consumer Confidence Report?
- Yes. BILLINGS CITY 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 BILLINGS CITY OF’s next Consumer Confidence Report due?
- BILLINGS CITY OF’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does BILLINGS CITY OF have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for BILLINGS CITY OF.
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
ENGELS, LOUIS W
406-657-8349
BILLINGS, MT 59101