Public water system · MT0062481
ActiveColter Cg and Cooke Wc
At a glance
Colter Cg and Cooke Wc (PWSID MT0062481) is an active transient non-community water system in Park County, Montana. It reports serving 25 people through 8 service connections. Its primary water source is groundwater, and EPA lists it as owned by the federal government. Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in October 2023.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
25
Service connections
8
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Colter Cg and Cooke Wc compare with other water systems in Park County?
By EPA's size categories, Colter Cg and Cooke Wc is a very small system (500 people or fewer). Park County has 59 active public water systems. Its population served is well below the county average of 271 people per system, and accounts for 0.2% of the 15,983 people reported by systems filed under the county. Across Montana, the 2,378 active systems average 489 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Colter Cg and Cooke Wc is well below that figure.
What does “transient non-community water system” mean?
A transient non-community water system serves places where people do not stay long, such as gas stations and campgrounds, and regularly serves at least 25 people a day for at least 60 days a year. Montana has 1,206 active transient non-community water systems, 51% 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 Colter Cg and Cooke Wc?
EPA lists Colter Cg and Cooke Wc as owned by the federal 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. 3 of the 59 active systems in Park County (5.1%) are also owned by the federal government.
Does Colter Cg and Cooke Wc have drinking water violations?
Of the 12 most recent violations in EPA's records, 3 are health-based, and the most recent began in October 2023. The violations listed here began between September 2015 and October 2023. By type: 6 monitoring, 3 required treatment not met 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 |
|---|---|---|---|---|
| 2023-10-01 | Required treatment not metTreatment Technique Startup Procedures (RTCR) · code 2D | Revised Total Coliform Rulecode 8000 | Yes | 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 |
| 2022-09-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2022-07-02 | Required treatment not metTreatment Technique Startup Procedures (RTCR) · code 2D | Revised Total Coliform Rulecode 8000 | Yes | Resolved |
| 2020-09-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2017-08-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2017-07-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2016-08-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2016-07-02 | Required treatment not metTreatment Technique Startup Procedures (RTCR) · code 2D | Revised Total Coliform Rulecode 8000 | Yes | Resolved |
| 2016-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitrate-Nitritecode 1038 | No | Resolved |
| 2015-09-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | 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.
Colter Cg and Cooke Wc: frequently asked questions
Who runs Colter Cg and Cooke Wc?
Colter Cg and Cooke Wc (PWSID MT0062481) is a transient non-community water system owned by the federal government. It is regulated by the MT state drinking water program.
How many people does Colter Cg and Cooke Wc serve?
Colter Cg and Cooke Wc reports serving 25 people through 8 service connections in Park County, Montana.
Where does Colter Cg and Cooke Wc 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 Colter Cg and Cooke Wc have any drinking water violations?
Of the 12 most recent violations in EPA's records, 3 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 Colter Cg and Cooke Wc'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, 3 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 Colter Cg and Cooke Wc's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Colter Cg and Cooke Wc is a 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 Park County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Livingston City of | Park | 7,500 | Community | Groundwater |
| Emigrant Rest Stop | Park | 800 | Transient non-community | Groundwater |
| Gardiner Park Co Water Dist | Park | 700 | Community | Groundwater |
| Sage Lodge | Park | 500 | Transient non-community | Groundwater |
| Yellowstone Travel Plaza Truck Stop | Park | 500 | Transient non-community | Groundwater |
| Chico Hot Springs | Park | 415 | Non-transient non-community | Surface water |
Related pages
Working with water-system records? Pro adds alerts, change history and CSV export ($49/mo); Enterprise adds full national files, the API and an MCP server for AI tools.
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, “Colter Cg and Cooke Wc, PWSID MT0062481, Montana”, https://aquacensus.com/water-systems/montana/colter-cg-and-cooke-wc-mt0062481 (data as of October 1, 2026).