Public water system · MT0005057

Active

Elder Grove Middle School Bldg 6

At a glance

Elder Grove Middle School Bldg 6 (PWSID MT0005057) is an active non-transient non-community water system in Yellowstone County, Montana. It reports serving 600 people through 1 service connection. Its primary water source is purchased surface water, and EPA lists it as owned by a state government. EPA's records list 6 violations for this system; 4 are health-based, and the most recent began in October 2023.

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

Population served

600

Service connections

Primary source

SWP

Purchased surface water

System type

NTNCWS

Non-transient non-community water system

System record

PWSIDMT0005057

System typeNon-transient non-community water system

Activity statusActive

Population served600

Service connections1

Primary water sourcePurchased surface water

Owner typeState government

Primacy agencyMT state drinking water program

City servedBillings

StateMontana

ZIP—

CountyYellowstone County

How does Elder Grove Middle School Bldg 6 compare with other water systems in Yellowstone County?

By EPA's size categories, Elder Grove Middle School Bldg 6 is a small system (501 to 3,300 people). Yellowstone County has 119 active public water systems. Its population served is about 58% below the county average of 1,422 people per system, and accounts for 0.4% of the 169,240 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 Elder Grove Middle School Bldg 6 is about 40% above 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. Purchased surface water means the system buys surface water from another public water system rather than drawing its own. 212 Montana systems (8.9%) list purchased surface water as their primary source.

Who owns and regulates Elder Grove Middle School Bldg 6?

EPA lists Elder Grove Middle School Bldg 6 as owned by a state 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. 6 of the 119 active systems in Yellowstone County (5%) are also owned by a state government.

Does Elder Grove Middle School Bldg 6 have drinking water violations?

EPA's records list 6 violations for this system; 4 are health-based, and the most recent began in October 2023. The violations listed here began between November 2020 and October 2023. By type: 3 contaminant level above the legal limit, 2 monitoring and reporting and 1 required treatment not met. The contaminant or rule involved most often is Nitrate-Nitrite (4 of them). EPA lists 5 as resolved and 1 as addressed. 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. Addressed means the violation is not resolved or archived and is covered by formal enforcement.

Began	Violation	Contaminant or rule	Health-based	Status
2023-10-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Single Sample · code 01	Nitrate-Nitritecode 1038	Yes	Resolved
2023-07-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Single Sample · code 01	Nitrate-Nitritecode 1038	Yes	Resolved
2023-04-01	Contaminant level above the legal limitMaximum Contaminant Level Violation, Single Sample · code 01	Nitrate-Nitritecode 1038	Yes	Resolved
2022-10-01	Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52	Lead and Copper Rulecode 5000	No	Addressed
2021-04-01	Monitoring and reportingMonitoring, Regular · code 03	Nitrate-Nitritecode 1038	No	Resolved
2020-11-04	Required treatment not metTreatment Technique, Level 1 Assessment (RTCR) · code 2A	Revised Total Coliform Rulecode 8000	Yes	Resolved

All 6 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.

Elder Grove Middle School Bldg 6: frequently asked questions

Who runs Elder Grove Middle School Bldg 6?

Elder Grove Middle School Bldg 6 (PWSID MT0005057) is a non-transient non-community water system owned by a state government. It is regulated by the MT state drinking water program.

How many people does Elder Grove Middle School Bldg 6 serve?

Elder Grove Middle School Bldg 6 reports serving 600 people through 1 service connection in Yellowstone County, Montana.

Where does Elder Grove Middle School Bldg 6 get its water?

EPA SDWIS lists this system's primary water source as purchased surface water. Purchased surface water means the system buys surface water from another public water system rather than drawing its own.

Does Elder Grove Middle School Bldg 6 have any drinking water violations?

EPA's records list 6 violations for this system; 4 are health-based, and the most recent began in October 2023. 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 Elder Grove Middle School Bldg 6'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 6 violations for this system; 4 are health-based, and the most recent began in October 2023. For current results, consult EPA ECHO, or the MT state drinking water program.

Where can I find Elder Grove Middle School Bldg 6's water quality report?

The annual Consumer Confidence Report requirement applies to community water systems. Elder Grove Middle School Bldg 6 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 Yellowstone County

Water system	County	Population served	Type	Source
Billings City of	Yellowstone	114,000	Community	Surface water
Billings Heights Co Water Dist of	Yellowstone	12,000	Community	Purchased surface water
Laurel Municipal Water System	Yellowstone	6,339	Community	Surface water
Lockwood Water and Sewer District	Yellowstone	5,900	Community	Surface water
Rocky Mountain College	Yellowstone	5,700	Non-transient non-community	Purchased surface water
Montana State University Billings	Yellowstone	2,999	Non-transient non-community	Purchased surface water

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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, “Elder Grove Middle School Bldg 6, PWSID MT0005057, Montana”, https://aquacensus.com/water-systems/montana/elder-grove-middle-school-bldg-6-mt0005057 (data as of October 1, 2026).