Public water system · MT0002488

Active

St Regis School Old Bldg

At a glance

St Regis School Old Bldg (PWSID MT0002488) is an active non-transient non-community water system in Mineral County, Montana. It reports serving 176 people through 3 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2018.

Dataset updated October 2026 . Source: EPA SDWIS/ECHO public records.

Population served

176

Service connections

Primary source

Groundwater

System type

NTNCWS

Non-transient non-community water system

System record

PWSIDMT0002488

System typeNon-transient non-community water system

Activity statusActive

Population served176

Service connections3

Primary water sourceGroundwater

Owner typeLocal government

Primacy agencyMT state drinking water program

City servedSt Regis

StateMontana

ZIP—

CountyMineral County

How does St Regis School Old Bldg compare with other water systems in Mineral County?

By EPA's size categories, St Regis School Old Bldg is a very small system (500 people or fewer). Mineral County has 37 active public water systems. Its population served is about 61% below the county average of 454 people per system, and accounts for 1% 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 non-transient non-community water system reports serving 430 people, so St Regis School Old Bldg is about 59% below that figure.

What does “non-transient non-community water system” mean?

A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. Montana has 319 active non-transient non-community water systems, 13% 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 St Regis School Old Bldg?

EPA lists St Regis School Old Bldg 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 St Regis School Old Bldg have drinking water violations?

Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2018. The violations listed here began between January 1996 and October 2018. By type: 12 monitoring and reporting. The contaminant or rule involved most often is Lead and Copper Rule (3 of them). EPA lists 12 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
2018-10-01	Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52	Lead and Copper Rulecode 5000	No	Resolved
2015-12-30	Monitoring and reportingLead Consumer Notice · code 66	Lead and Copper Rulecode 5000	No	Resolved
2010-01-01	Monitoring and reportingLead Consumer Notice · code 66	Lead and Copper Rulecode 5000	No	Resolved
2007-11-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Resolved
2005-11-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Resolved
1999-10-01	Monitoring and reportingMonitoring, Routine Major (TCR) · code 23	Total coliform bacteria (TCR)code 3100	No	Resolved
1999-01-01	Monitoring and reportingMonitoring, Regular · code 03	Nitratecode 1040	No	Resolved
1997-01-01	Monitoring and reportingMonitoring, Regular · code 03	Nitratecode 1040	No	Resolved
1996-01-01	Monitoring and reportingMonitoring, Regular · code 03	cis-1,2-Dichloroethylenecode 2380	No	Resolved
1996-01-01	Monitoring and reportingMonitoring, Regular · code 03	Tetrachloroethylenecode 2987	No	Resolved
1996-01-01	Monitoring and reportingMonitoring, Regular · code 03	1,2-Dichloropropanecode 2983	No	Resolved
1996-01-01	Monitoring and reportingMonitoring, Regular · code 03	Chlorobenzenecode 2989	No	Resolved

The 12 most recent 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.

St Regis School Old Bldg: frequently asked questions

Who runs St Regis School Old Bldg?

St Regis School Old Bldg (PWSID MT0002488) is a non-transient non-community water system owned by a local government. It is regulated by the MT state drinking water program.

How many people does St Regis School Old Bldg serve?

St Regis School Old Bldg reports serving 176 people through 3 service connections in Mineral County, Montana.

Where does St Regis School Old Bldg 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 St Regis School Old Bldg have any drinking water violations?

Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2018. 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 St Regis School Old Bldg'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. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in October 2018. For current results, consult EPA ECHO, or the MT state drinking water program.

Where can I find St Regis School Old Bldg's water quality report?

The annual Consumer Confidence Report requirement applies to community water systems. St Regis School Old Bldg is a non-transient non-community water system, so it is not required to publish one; like every public water system, it must notify the people it serves about violations under EPA's public notification rules.

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
Superior Town of	Mineral	1,100	Community	Groundwater
Lincolns Silver Dollar Bar	Mineral	520	Transient non-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, “St Regis School Old Bldg, PWSID MT0002488, Montana”, https://aquacensus.com/water-systems/montana/st-regis-school-old-bldg-mt0002488 (data as of October 1, 2026).