Public water system · WY5680124
ActiveBtnf-Fremont Lake Cg
At a glance
Btnf-Fremont Lake Cg (PWSID WY5680124) is an active transient non-community water system in Sublette County, Wyoming. It reports serving 50 people through 13 service connections. Its primary water source is groundwater, and EPA lists it as owned by the federal government. EPA's records list 7 violations for this system; 2 are health-based, and the most recent began in May 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
50
Service connections
13
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Btnf-Fremont Lake Cg compare with other water systems in Sublette County?
By EPA's size categories, Btnf-Fremont Lake Cg is a very small system (500 people or fewer). Sublette County has 27 active public water systems. Its population served is well below the county average of 212 people per system, and accounts for 0.9% of the 5,723 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 Btnf-Fremont Lake Cg is about 65% 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 Btnf-Fremont Lake Cg?
EPA lists Btnf-Fremont Lake Cg as owned by the federal government. 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. 2 of the 27 active systems in Sublette County (7.4%) are also owned by the federal government.
Does Btnf-Fremont Lake Cg have drinking water violations?
EPA's records list 7 violations for this system; 2 are health-based, and the most recent began in May 2025. The violations listed here began between January 1993 and May 2025. By type: 3 monitoring and reporting, 2 required treatment not met, 1 monitoring and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Revised Total Coliform Rule (3 of them). EPA lists 5 as resolved and 2 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 |
|---|---|---|---|---|
| 2025-05-01 | Required treatment not metTreatment Technique Startup Procedures (RTCR) · code 2D | Revised Total Coliform Rulecode 8000 | Yes | Resolved |
| 2022-08-03 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Resolved |
| 2018-07-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2017-11-03 | Public notice, recordkeeping or otherSample Siting Plan Errors (RTCR) · code 5A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2012-09-01 | Monitoring and reportingMonitoring, Repeat Major (TCR) · code 25 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1997-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Archived |
| 1993-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Archived |
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.
Btnf-Fremont Lake Cg: frequently asked questions
Who runs Btnf-Fremont Lake Cg?
Btnf-Fremont Lake Cg (PWSID WY5680124) is a transient non-community water system owned by the federal government. It is regulated by the WY state drinking water program.
How many people does Btnf-Fremont Lake Cg serve?
Btnf-Fremont Lake Cg reports serving 50 people through 13 service connections in Sublette County, Wyoming.
Where does Btnf-Fremont Lake Cg 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 Btnf-Fremont Lake Cg have any drinking water violations?
EPA's records list 7 violations for this system; 2 are health-based, and the most recent began in May 2025. 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 Btnf-Fremont Lake Cg'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; 2 are health-based, and the most recent began in May 2025. For current results, consult EPA ECHO, or the WY state drinking water program.
Where can I find Btnf-Fremont Lake Cg's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Btnf-Fremont Lake Cg 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 Sublette County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Pinedale Municipal Ws | Sublette | 1,900 | Community | Surface water |
| Marbleton, Town of | Sublette | 861 | Community | Groundwater |
| High Meadow Ranch | Sublette | 580 | Community | Groundwater |
| Bomgaars Supply, Incorporated | Sublette | 450 | Transient non-community | Groundwater |
| Big Piney, Town of | Sublette | 445 | Community | Groundwater |
| Jonah Energy (Linn) Oc | Sublette | 130 | Non-transient non-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, “Btnf-Fremont Lake Cg, PWSID WY5680124, Wyoming”, https://aquacensus.com/water-systems/wyoming/btnf-fremont-lake-cg-wy5680124 (data as of October 1, 2026).