SUPERIOR, MT · Mineral County
SUPERIOR TOWN OF Water System
Consumer Confidence Report status
SUPERIOR 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 no open violations for SUPERIOR TOWN 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)
- MT0000339
- System type
- Community Water System
- Population served
- 1,100
- Service connections
- 454
- Ownership
- local government
- Water source
- groundwater (wells)
SUPERIOR TOWN OF is one of 123 community water systems in Montana in the 501 to 3,300 people size category, serving 1,100 people from groundwater.
As of August 1, 2026, its federal record holds 5 entries between 1996 and 2017, all of which EPA lists as closed. Nothing has been added since 2017.
All 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 synthetic organic chemicals, the Groundwater Rule, and inorganic chemicals.
Violation history
Monitoring of Treatment (SWTR-Unfilt/GWR)
—Groundwater Rule
June 1, 2017 – June 30, 2017
ResolvedMonitoring, Regular
—Nitrate
January 1, 1997 – December 31, 1997
ResolvedMonitoring, Regular
—Aldicarb sulfone
January 1, 1996 – December 31, 1998
ResolvedMonitoring, Regular
—Aldicarb sulfoxide
January 1, 1996 – December 31, 1998
ResolvedMonitoring, Regular
—Aldicarb
January 1, 1996 – December 31, 1998
Resolved
Resolved addressed and confirmed by the state
| Period | Violation | Contaminant / rule | Health-based | Status |
|---|---|---|---|---|
| June 1, 2017 – June 30, 2017 | Monitoring of Treatment (SWTR-Unfilt/GWR) | Groundwater Rule | — | Resolved |
| January 1, 1997 – December 31, 1997 | Monitoring, Regular | Nitrate | — | Resolved |
| January 1, 1996 – December 31, 1998 | Monitoring, Regular | Aldicarb sulfone | — | Resolved |
| January 1, 1996 – December 31, 1998 | Monitoring, Regular | Aldicarb sulfoxide | — | Resolved |
| January 1, 1996 – December 31, 1998 | Monitoring, Regular | Aldicarb | — | Resolved |
Resolved addressed and confirmed by the state
Enforcement actions
- August 1, 2017State Compliance achieved1 linked violation
- July 20, 2017State Public Notification received1 linked violation
- July 13, 2017State Violation/Reminder Notice1 linked violation
- July 13, 2017State Public Notification requested1 linked violation
- May 15, 2009State Compliance achieved1 linked violation
- April 17, 2009State Compliance achieved6 linked violations
- May 15, 2001State Compliance achieved1 linked violation
Common questions
Is SUPERIOR TOWN OF required to publish a Consumer Confidence Report?
- Yes. SUPERIOR 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 SUPERIOR TOWN OF’s next Consumer Confidence Report due?
- SUPERIOR TOWN OF’s next Consumer Confidence Report is due by July 1, 2027. The report covers calendar year 2026.
Does SUPERIOR TOWN OF have any open drinking water violations on record?
- As of August 1, 2026, EPA's federal records show no open violations for SUPERIOR TOWN 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
SCHNEIDER, BRENDA
406-822-3594
SUPERIOR, MT 59872