Public water system · WY5600027
ActiveGros Ventre Utility
At a glance
Gros Ventre Utility (PWSID WY5600027) is an active community water system in Teton County, Wyoming. It reports serving 200 people through 130 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, one is health-based, and the most recent began in February 2021.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
200
Service connections
130
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Gros Ventre Utility compare with other water systems in Teton County?
By EPA's size categories, Gros Ventre Utility is a very small system (500 people or fewer). Teton County has 112 active public water systems. Its population served is well below the county average of 697 people per system, and accounts for 0.3% of the 78,057 people reported by systems filed under the county. Across Wyoming, the 775 active systems average 838 people each. Nationally, the average active community water system reports serving 6,703 people, so Gros Ventre Utility is well below that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Wyoming has 332 active community water systems, 43% 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 Gros Ventre Utility?
EPA lists Gros Ventre Utility 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. 69 of the 112 active systems in Teton County (62%) are also privately owned.
Does Gros Ventre Utility have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in February 2021. The violations listed here began between January 1994 and February 2021. By type: 7 monitoring and reporting, 2 monitoring, 2 public notice, recordkeeping or other and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (4 of them). EPA lists 7 as archived and 5 as resolved. 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. 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 |
|---|---|---|---|---|
| 2021-02-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2016-11-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2008-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2007-07-01 | Public notice, recordkeeping or otherConsumer Confidence Report Complete Failure to Report · code 71 | Consumer Confidence Rulecode 7000 | No | Resolved |
| 2004-11-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 2004-07-01 | Monitoring and reportingMonitoring, Repeat Major (TCR) · code 25 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 2002-12-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 2002-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 2000-01-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 1998-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Vinyl chloridecode 2976 | No | Archived |
| 1996-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Archived |
| 1994-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Archived |
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.
Gros Ventre Utility: frequently asked questions
Who runs Gros Ventre Utility?
Gros Ventre Utility (PWSID WY5600027) is a community water system privately owned. It is regulated by the WY state drinking water program.
How many people does Gros Ventre Utility serve?
Gros Ventre Utility reports serving 200 people through 130 service connections in Teton County, Wyoming.
Where does Gros Ventre Utility 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 Gros Ventre Utility have any drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in February 2021. 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 Gros Ventre Utility'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, one is health-based, and the most recent began in February 2021. For current results, consult the system's annual water quality report, EPA ECHO, or the WY state drinking water program.
Where can I find Gros Ventre Utility's water quality report?
As a community water system, Gros Ventre Utility must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Teton County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Jackson, Town of | Teton | 24,760 | Community | Groundwater |
| Ynp-Old Faithful | Teton | 7,675 | Community | Surface water |
| Ynp - Lake Village | Teton | 5,925 | Community | Groundwater under influence of surface water |
| Gtnp-Colter Bay Village | Teton | 4,514 | Community | Groundwater |
| Ynp-Grant Village | Teton | 3,513 | Transient non-community | Surface water |
| Grand Targhee Resort | Teton | 2,500 | 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, “Gros Ventre Utility, PWSID WY5600027, Wyoming”, https://aquacensus.com/water-systems/wyoming/gros-ventre-utility-wy5600027 (data as of October 1, 2026).