Public water system · WY5680097
ActiveGtnp-Flagg Ranch
At a glance
Gtnp-Flagg Ranch (PWSID WY5680097) is an active transient non-community water system in Teton County, Wyoming. It reports serving 600 people through 450 service connections. Its primary water source is groundwater, and EPA lists it as owned by the federal government. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
600
Service connections
450
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Gtnp-Flagg Ranch compare with other water systems in Teton County?
By EPA's size categories, Gtnp-Flagg Ranch is a small system (501 to 3,300 people). Teton County has 112 active public water systems. Its population served is about 14% below the county average of 697 people per system, and accounts for 0.8% 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 transient non-community water system reports serving 144 people, so Gtnp-Flagg Ranch is about 4.2 times 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 Gtnp-Flagg Ranch?
EPA lists Gtnp-Flagg Ranch 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. 32 of the 112 active systems in Teton County (29%) are also owned by the federal government.
Does Gtnp-Flagg Ranch have drinking water violations?
No SDWA violations on record.
EPA's SDWA violation and enforcement data (via EPA ECHO, updated quarterly) lists no violations for Gtnp-Flagg Ranch. For the latest compliance status, check EPA ECHO for current compliance history.
Gtnp-Flagg Ranch: frequently asked questions
Who runs Gtnp-Flagg Ranch?
Gtnp-Flagg Ranch (PWSID WY5680097) 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 Gtnp-Flagg Ranch serve?
Gtnp-Flagg Ranch reports serving 600 people through 450 service connections in Teton County, Wyoming.
Where does Gtnp-Flagg 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 Gtnp-Flagg Ranch have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Gtnp-Flagg 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 Safe Drinking Water Act records list no violations for this system. For current results, consult EPA ECHO, or the WY state drinking water program.
Where can I find Gtnp-Flagg Ranch's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Gtnp-Flagg 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 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, “Gtnp-Flagg Ranch, PWSID WY5680097, Wyoming”, https://aquacensus.com/water-systems/wyoming/gtnp-flagg-ranch-wy5680097 (data as of October 1, 2026).