Public water system · MT0000339
ActiveSuperior Town of
At a glance
Town of Superior (PWSID MT0000339) is an active community water system in Mineral County, Montana. It reports serving 1,100 people through 454 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. EPA's records list 8 violations for this system; none is health-based, and the most recent began in June 2017.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
1,100
Service connections
454
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Town of Superior compare with other water systems in Mineral County?
By EPA's size categories, Town of Superior is a small system (501 to 3,300 people). Mineral County has 37 active public water systems, and Town of Superior is the 5th-largest of them by population served. Its population served is about 142% above the county average of 454 people per system, and accounts for 6.5% of the 16,812 people reported by systems filed under the county. Across Montana, the 2,378 active systems average 489 people each. Nationally, the average active community water system reports serving 6,703 people, so Town of Superior is well below that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Montana has 853 active community water systems, 36% of the state's 2,378 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 1,994 Montana systems (84%) list groundwater as their primary source.
Who owns and regulates Town of Superior?
EPA lists Town of Superior as owned by a local government. The MT state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 4 of the 37 active systems in Mineral County (11%) are also owned by a local government.
Does Town of Superior have drinking water violations?
EPA's records list 8 violations for this system; none is health-based, and the most recent began in June 2017. The violations listed here began between January 1996 and June 2017. By type: 8 monitoring and reporting. The contaminants or rules involved are Groundwater Rule, Total coliform bacteria (TCR), Nitrate and Aldicarb sulfoxide. EPA lists 8 as resolved. Resolved means at least one resolving action is on record: the system returned to compliance, the rule no longer applies, or no further action was needed.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2017-06-01 | Monitoring and reportingMonitoring of Treatment (SWTR-Unfilt/GWR) · code 31 | Groundwater Rulecode 0700 | No | Resolved |
| 1998-06-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1997-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1996-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Aldicarb sulfoxidecode 2043 | No | Resolved |
| 1996-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Aldicarb sulfonecode 2044 | No | Resolved |
| 1996-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Oxamylcode 2036 | No | Resolved |
| 1996-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Carbofurancode 2046 | No | Resolved |
| 1996-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Aldicarbcode 2047 | No | Resolved |
All 8 violations in EPA's records, newest first.Labels and codes come from EPA's SDWIS reference tables. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found. "Health-based" marks violations of a legal limit or required treatment.
Town of Superior: frequently asked questions
Who runs Town of Superior?
Town of Superior (PWSID MT0000339) is a community water system owned by a local government. It is regulated by the MT state drinking water program.
How many people does Town of Superior serve?
Town of Superior reports serving 1,100 people through 454 service connections in Mineral County, Montana.
Where does Town of Superior get its water?
EPA SDWIS lists this system's primary water source as groundwater. Groundwater means the system draws its water from wells or springs fed by underground aquifers.
Does Town of Superior have any drinking water violations?
EPA's records list 8 violations for this system; none is health-based, and the most recent began in June 2017. A monitoring or reporting violation means a required test or report was missed or late; it does not by itself mean a contaminant was found.
Is Town of Superior's water safe to drink?
AquaCensus shows EPA compliance records, not current water test results, so it cannot say whether the water is safe at a given moment. EPA's records list 8 violations for this system; none is health-based, and the most recent began in June 2017. For current results, consult the system's annual water quality report, EPA ECHO, or the MT state drinking water program.
Where can I find Town of Superior's water quality report?
As a community water system, Town of Superior must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Mineral County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Quartz Flat Rest Stop West | Mineral | 3,301 | Transient non-community | Groundwater |
| Quartz Flat Rest Stop East | Mineral | 3,301 | Transient non-community | Groundwater |
| Dena Mora Saltese East Rest | Mineral | 3,000 | Transient non-community | Groundwater |
| Dena Mora Saltese West Rest | Mineral | 2,000 | Transient non-community | Groundwater |
| Lincolns Silver Dollar Bar | Mineral | 520 | Transient non-community | Groundwater |
| Alberton Town of | Mineral | 495 | Community | Groundwater |
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About this data
Source: U.S. EPA Safe Drinking Water Information System (SDWIS) and SDWA violation records, via EPA ECHO, as published October 1, 2026 — AquaCensus refreshes it quarterly. See the methodology for how records are matched, cleaned and scored.
Cite as: AquaCensus, “Superior Town of, PWSID MT0000339, Montana”, https://aquacensus.com/water-systems/montana/superior-town-of-mt0000339 (data as of October 1, 2026).