Public water system · MT0001656

Active

Rosebud School District No 12

At a glance

Rosebud School District No 12 (PWSID MT0001656) is an active non-transient non-community water system in Rosebud County, Montana. It reports serving 100 people through 1 service connection. 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 December 2024.

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

Population served

100

Service connections

Primary source

Groundwater

System type

NTNCWS

Non-transient non-community water system

System record

PWSIDMT0001656

System typeNon-transient non-community water system

Activity statusActive

Population served100

Service connections1

Primary water sourceGroundwater

Owner typeLocal government

Primacy agencyMT state drinking water program

City servedRosebud

StateMontana

ZIP—

CountyRosebud County

How does Rosebud School District No 12 compare with other water systems in Rosebud County?

By EPA's size categories, Rosebud School District No 12 is a very small system (500 people or fewer). Rosebud County has 15 active public water systems. Its population served is well below the county average of 494 people per system, and accounts for 1.3% of the 7,415 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 Rosebud School District No 12 is well 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 Rosebud School District No 12?

EPA lists Rosebud School District No 12 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 15 active systems in Rosebud County (27%) are also owned by a local government.

Does Rosebud School District No 12 have drinking water violations?

Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in December 2024. The violations listed here began between June 2018 and December 2024. By type: 9 monitoring and 3 monitoring and reporting. The contaminant or rule involved most often is Revised Total Coliform Rule (9 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
2024-12-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2023-07-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2023-01-01	Monitoring and reportingMonitoring, Regular · code 03	Nitrate-Nitritecode 1038	No	Resolved
2022-10-01	Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52	Lead and Copper Rulecode 5000	No	Resolved
2021-06-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2021-05-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2019-03-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2018-12-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2018-11-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2018-10-01	Monitoring and reportingMonitoring and Reporting (DBP) · code 27	Chlorinecode 0999	No	Resolved
2018-07-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	No	Resolved
2018-06-01	MonitoringMonitoring, Routine (RTCR) · code 3A	Revised Total Coliform Rulecode 8000	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.

Rosebud School District No 12: frequently asked questions

Who runs Rosebud School District No 12?

Rosebud School District No 12 (PWSID MT0001656) 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 Rosebud School District No 12 serve?

Rosebud School District No 12 reports serving 100 people through 1 service connection in Rosebud County, Montana.

Where does Rosebud School District No 12 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 Rosebud School District No 12 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 December 2024. 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 Rosebud School District No 12'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 December 2024. For current results, consult EPA ECHO, or the MT state drinking water program.

Where can I find Rosebud School District No 12's water quality report?

The annual Consumer Confidence Report requirement applies to community water systems. Rosebud School District No 12 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 Rosebud County

Water system	County	Population served	Type	Source
Colstrip City of	Rosebud	2,350	Community	Surface water
Forsyth City of	Rosebud	2,260	Community	Surface water
St Labre Indian School	Rosebud	650	Community	Groundwater
East Bound Hathaway Rest Area	Rosebud	600	Transient non-community	Groundwater
Wb Hathaway Rest Area	Rosebud	600	Transient non-community	Groundwater
Ashland Water and Sewer Dist	Rosebud	400	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, “Rosebud School District No 12, PWSID MT0001656, Montana”, https://aquacensus.com/water-systems/montana/rosebud-school-district-no-12-mt0001656 (data as of October 1, 2026).