Public water system · WY5601521
ActiveRimrock Ranch
At a glance
Rimrock Ranch (PWSID WY5601521) is an active transient non-community water system in Park County, Wyoming. It reports serving 40 people through 13 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list one violation for this system; it is not health-based, and the most recent began in June 2016.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
40
Service connections
13
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Rimrock Ranch compare with other water systems in Park County?
By EPA's size categories, Rimrock Ranch is a very small system (500 people or fewer). Park County has 49 active public water systems. Its population served is well below the county average of 777 people per system, and accounts for 0.1% of the 38,068 people reported by systems filed under the county. Across Wyoming, the 775 active systems average 838 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Rimrock Ranch 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. Wyoming has 352 active transient non-community water systems, 45% 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 Rimrock Ranch?
EPA lists Rimrock Ranch 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. 27 of the 49 active systems in Park County (55%) are also privately owned.
Does Rimrock Ranch have drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in June 2016. By type: 1 monitoring. The contaminant or rule involved is Revised Total Coliform Rule. EPA lists 1 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 |
|---|---|---|---|---|
| 2016-06-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
The one violation in EPA's records.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.
Rimrock Ranch: frequently asked questions
Who runs Rimrock Ranch?
Rimrock Ranch (PWSID WY5601521) is a transient non-community water system privately owned. It is regulated by the WY state drinking water program.
How many people does Rimrock Ranch serve?
Rimrock Ranch reports serving 40 people through 13 service connections in Park County, Wyoming.
Where does Rimrock Ranch 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 Rimrock Ranch have any drinking water violations?
EPA's records list one violation for this system; it is not health-based, and the most recent began in June 2016. 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 Rimrock Ranch'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 one violation for this system; it is not health-based, and the most recent began in June 2016. For current results, consult EPA ECHO, or the WY state drinking water program.
Where can I find Rimrock Ranch's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Rimrock Ranch 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 |
|---|---|---|---|---|
| Cody, City of | Park | 10,224 | Community | Purchased surface water |
| Northwest Rural Water District | Park | 7,330 | Community | Purchased surface water |
| Powell, City of | Park | 6,310 | Community | Purchased surface water |
| Ynp-Canyon Village | Park | 4,300 | Non-transient non-community | Surface water |
| Ynp-Mammoth Hot Springs | Park | 2,600 | Community | Surface water |
| Ynp-Norris | Park + 1 more | 1,515 | 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, “Rimrock Ranch, PWSID WY5601521, Wyoming”, https://aquacensus.com/water-systems/wyoming/rimrock-ranch-wy5601521 (data as of October 1, 2026).