Public water system · WY5601649
ActiveSpence Foundation - Thunderhead Ranch
At a glance
Spence Foundation - Thunderhead Ranch (PWSID WY5601649) is an active transient non-community water system in Fremont County, Wyoming. It reports serving 72 people through 14 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 4 violations for this system; 2 are health-based, and the most recent began in August 2022.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
72
Service connections
14
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Spence Foundation - Thunderhead Ranch compare with other water systems in Fremont County?
By EPA's size categories, Spence Foundation - Thunderhead Ranch is a very small system (500 people or fewer). Fremont County has 61 active public water systems. Its population served is well below the county average of 433 people per system, and accounts for 0.3% of the 26,380 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 Spence Foundation - Thunderhead Ranch is about half of 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 Spence Foundation - Thunderhead Ranch?
EPA lists Spence Foundation - Thunderhead 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. 37 of the 61 active systems in Fremont County (61%) are also privately owned.
Does Spence Foundation - Thunderhead Ranch have drinking water violations?
EPA's records list 4 violations for this system; 2 are health-based, and the most recent began in August 2022. The violations listed here began between July 2012 and August 2022. By type: 2 required treatment not met, 1 monitoring and 1 monitoring and reporting. The contaminant or rule involved most often is Revised Total Coliform Rule (3 of them). EPA lists 4 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 |
|---|---|---|---|---|
| 2022-08-01 | Required treatment not metTreatment Technique Startup Procedures (RTCR) · code 2D | Revised Total Coliform Rulecode 8000 | Yes | Resolved |
| 2018-08-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2017-01-01 | Required treatment not metTreatment Technique Startup Procedures (RTCR) · code 2D | Revised Total Coliform Rulecode 8000 | Yes | Resolved |
| 2012-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
All 4 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.
Spence Foundation - Thunderhead Ranch: frequently asked questions
Who runs Spence Foundation - Thunderhead Ranch?
Spence Foundation - Thunderhead Ranch (PWSID WY5601649) is a transient non-community water system privately owned. It is regulated by the WY state drinking water program.
How many people does Spence Foundation - Thunderhead Ranch serve?
Spence Foundation - Thunderhead Ranch reports serving 72 people through 14 service connections in Fremont County, Wyoming.
Where does Spence Foundation - Thunderhead 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 Spence Foundation - Thunderhead Ranch have any drinking water violations?
EPA's records list 4 violations for this system; 2 are health-based, and the most recent began in August 2022. 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 Spence Foundation - Thunderhead 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 4 violations for this system; 2 are health-based, and the most recent began in August 2022. For current results, consult EPA ECHO, or the WY state drinking water program.
Where can I find Spence Foundation - Thunderhead Ranch's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Spence Foundation - Thunderhead 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 Fremont County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Riverton, City of | Fremont | 10,330 | Community | Surface water |
| Lander, City of | Fremont | 7,615 | Community | Surface water |
| Dubois, Town of | Fremont | 1,822 | Community | Groundwater |
| Shoshoni, Town of | Fremont | 515 | Community | Groundwater |
| Wy Dot-Sweetwater Rest Area | Fremont | 500 | Transient non-community | Groundwater |
| Hudson, Town of | Fremont | 460 | Community | Groundwater under influence of 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, “Spence Foundation - Thunderhead Ranch, PWSID WY5601649, Wyoming”, https://aquacensus.com/water-systems/wyoming/spence-foundation-thunderhead-ranch-wy5601649 (data as of October 1, 2026).