Public water system · WY5600328
ActivePowder River Coal-Caballo Mine
At a glance
Powder River Coal-Caballo Mine (PWSID WY5600328) is an active non-transient non-community water system in Campbell County, Wyoming. It reports serving 200 people through 8 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in April 2006.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
200
Service connections
8
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Powder River Coal-Caballo Mine compare with other water systems in Campbell County?
By EPA's size categories, Powder River Coal-Caballo Mine is a very small system (500 people or fewer). Campbell County has 68 active public water systems. Its population served is well below the county average of 779 people per system, and accounts for 0.4% of the 52,981 people reported by systems filed under the county. Across Wyoming, the 775 active systems average 838 people each. Nationally, the average active non-transient non-community water system reports serving 430 people, so Powder River Coal-Caballo Mine is about half of 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. Wyoming has 91 active non-transient non-community water systems, 12% of the state's 775 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 585 Wyoming systems (75%) list groundwater as their primary source.
Who owns and regulates Powder River Coal-Caballo Mine?
EPA lists Powder River Coal-Caballo Mine as privately owned. The WY state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 51 of the 68 active systems in Campbell County (75%) are also privately owned.
Does Powder River Coal-Caballo Mine have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in April 2006. The violations listed here began between January 1998 and April 2006. By type: 12 monitoring and reporting. The contaminants or rules involved are Total coliform bacteria (TCR), 1,1,1-Trichloroethane, Trichloroethylene and 1,2-Dichloropropane. EPA lists 11 as resolved and 1 as archived. 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. Archived means the violation was not marked resolved but is more than five years past the end of the noncompliance period, so it no longer counts toward current compliance status.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2006-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1998-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1,1-Trichloroethanecode 2981 | No | Resolved |
| 1998-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Trichloroethylenecode 2984 | No | Resolved |
| 1998-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dichloropropanecode 2983 | No | Resolved |
| 1998-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Styrenecode 2996 | No | Resolved |
| 1998-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | trans-1,2-Dichloroethylenecode 2979 | No | Resolved |
| 1998-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Xylenes, Totalcode 2955 | No | Resolved |
| 1998-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Benzenecode 2990 | No | Resolved |
| 1998-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1-Dichloroethylenecode 2977 | No | Resolved |
| 1998-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2,4-Trichlorobenzenecode 2378 | No | Resolved |
| 1998-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Toluenecode 2991 | No | Resolved |
| 1998-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Carbon tetrachloridecode 2982 | 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.
Powder River Coal-Caballo Mine: frequently asked questions
Who runs Powder River Coal-Caballo Mine?
Powder River Coal-Caballo Mine (PWSID WY5600328) is a non-transient non-community water system privately owned. It is regulated by the WY state drinking water program.
How many people does Powder River Coal-Caballo Mine serve?
Powder River Coal-Caballo Mine reports serving 200 people through 8 service connections in Campbell County, Wyoming.
Where does Powder River Coal-Caballo Mine 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 Powder River Coal-Caballo Mine 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 April 2006. 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 Powder River Coal-Caballo Mine'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 April 2006. For current results, consult EPA ECHO, or the WY state drinking water program.
Where can I find Powder River Coal-Caballo Mine's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Powder River Coal-Caballo Mine 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 Campbell County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Gillette, City of | Campbell | 32,222 | Community | Groundwater |
| Wright Water & Sewer District | Campbell | 3,207 | Community | Groundwater |
| Sleepy Hollow Subdivision | Campbell | 2,400 | Community | Groundwater |
| Antelope Valley I&S District (Avisd) | Campbell | 1,280 | Community | Groundwater |
| Fox Park Subdivision | Campbell | 843 | Community | Groundwater |
| Heritage Village Subdivision | Campbell | 750 | 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, “Powder River Coal-Caballo Mine, PWSID WY5600328, Wyoming”, https://aquacensus.com/water-systems/wyoming/powder-river-coal-caballo-mine-wy5600328 (data as of October 1, 2026).