MISSOULA, MT · Missoula County
MISSOULA WATER Water System
Consumer Confidence Report status
MISSOULA WATER 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 MISSOULA WATER.
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)
- MT0000294
- System type
- Community Water System
- Population served
- 68,200
- Service connections
- 28,046
- Ownership
- local government
- Water source
- groundwater (wells)
MISSOULA WATER is the third largest community water system in Montana, serving 68,200 people from groundwater.
As of August 1, 2026, its federal record holds 4 entries between 2014 and 2017, all of which EPA lists as closed. Nothing has been added since 2017.
All 4 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 synthetic organic chemicals and the Radionuclides and Revised Rad Rule.
Violation history
Monitoring, Regular
—2,4,5-TP
April 1, 2017 – June 30, 2017
ResolvedMonitoring, Regular
—HEXACHLOROBENZENE
April 1, 2017 – June 30, 2017
ResolvedMonitoring, Regular
—Chlordane
April 1, 2017 – June 30, 2017
ResolvedMonitoring, Regular
—Gross Alpha, Excl. Radon and U
July 1, 2014 – September 23, 2014
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| April 1, 2017 – June 30, 2017 | Monitoring, Regular | 2,4,5-TP | — | Resolved |
| April 1, 2017 – June 30, 2017 | Monitoring, Regular | HEXACHLOROBENZENE | — | Resolved |
| April 1, 2017 – June 30, 2017 | Monitoring, Regular | Chlordane | — | Resolved |
| July 1, 2014 – September 23, 2014 | Monitoring, Regular | Gross Alpha, Excl. Radon and U | — | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
- July 18, 2017State Public Notification requested269 linked violations
Common questions
Is MISSOULA WATER required to publish a Consumer Confidence Report?
- Yes. MISSOULA WATER 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 MISSOULA WATER’s next Consumer Confidence Report due?
- MISSOULA WATER’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does MISSOULA WATER have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for MISSOULA WATER.
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
HENEHAN, MIKE
406-552-6700
MISSOULA, MT 59802