Public water system · MT0003473
ActiveNorthwest Water Conditioning Culligan W
At a glance
Northwest Water Conditioning Culligan W (PWSID MT0003473) is an active non-transient non-community water system in Yellowstone County, Montana. It reports serving 300 people through 1 service connection. Its primary water source is purchased surface water, and EPA lists it as privately owned. EPA's records list 7 violations for this system; none is health-based, and the most recent began in January 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
300
Service connections
1
Primary source
SWP
Purchased surface water
System type
NTNCWS
Non-transient non-community water system
System record
How does Northwest Water Conditioning Culligan W compare with other water systems in Yellowstone County?
By EPA's size categories, Northwest Water Conditioning Culligan W is a very small system (500 people or fewer). Yellowstone County has 119 active public water systems. Its population served is well below the county average of 1,422 people per system, and accounts for 0.2% 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 Northwest Water Conditioning Culligan W is about 30% 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. 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 Northwest Water Conditioning Culligan W?
EPA lists Northwest Water Conditioning Culligan W as privately owned. 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. 97 of the 119 active systems in Yellowstone County (82%) are also privately owned.
Does Northwest Water Conditioning Culligan W have drinking water violations?
EPA's records list 7 violations for this system; none is health-based, and the most recent began in January 2023. The violations listed here began between May 1994 and January 2023. By type: 6 monitoring and reporting and 1 monitoring. The contaminant or rule involved most often is Lead and Copper Rule (3 of them). EPA lists 7 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 |
|---|---|---|---|---|
| 2023-01-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Bromatecode 1011 | No | Resolved |
| 2020-01-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2018-07-01 | Monitoring and reportingMonitoring and Reporting (DBP) · code 27 | Bromatecode 1011 | No | Resolved |
| 2015-12-30 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2007-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2004-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1994-05-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 7 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.
Northwest Water Conditioning Culligan W: frequently asked questions
Who runs Northwest Water Conditioning Culligan W?
Northwest Water Conditioning Culligan W (PWSID MT0003473) is a non-transient non-community water system privately owned. It is regulated by the MT state drinking water program.
How many people does Northwest Water Conditioning Culligan W serve?
Northwest Water Conditioning Culligan W reports serving 300 people through 1 service connection in Yellowstone County, Montana.
Where does Northwest Water Conditioning Culligan W 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 Northwest Water Conditioning Culligan W have any drinking water violations?
EPA's records list 7 violations for this system; none is health-based, and the most recent began in January 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 Northwest Water Conditioning Culligan W'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 7 violations for this system; none is health-based, and the most recent began in January 2023. For current results, consult EPA ECHO, or the MT state drinking water program.
Where can I find Northwest Water Conditioning Culligan W's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Northwest Water Conditioning Culligan W 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, “Northwest Water Conditioning Culligan W, PWSID MT0003473, Montana”, https://aquacensus.com/water-systems/montana/northwest-water-conditioning-culligan-w-mt0003473 (data as of October 1, 2026).