Public water system · ID7220135
ActiveCentennial Mountain Shores Subdivision
At a glance
Centennial Mountain Shores Subdivision (PWSID ID7220135) is an active transient non-community water system in Fremont County, Idaho. It reports serving 190 people through 75 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's Safe Drinking Water Act records list no violations for this system.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
190
Service connections
75
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Centennial Mountain Shores Subdivision compare with other water systems in Fremont County?
By EPA's size categories, Centennial Mountain Shores Subdivision is a very small system (500 people or fewer). Fremont County has 86 active public water systems. Its population served is about 11% above the county average of 171 people per system, and accounts for 1.3% of the 14,663 people reported by systems filed under the county. Across Idaho, the 1,961 active systems average 899 people each. Nationally, the average active transient non-community water system reports serving 144 people, so Centennial Mountain Shores Subdivision is about 32% above 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. Idaho has 954 active transient non-community water systems, 49% of the state's 1,961 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 1,861 Idaho systems (95%) list groundwater as their primary source.
Who owns and regulates Centennial Mountain Shores Subdivision?
EPA lists Centennial Mountain Shores Subdivision as privately owned. The ID state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 62 of the 86 active systems in Fremont County (72%) are also privately owned.
Does Centennial Mountain Shores Subdivision 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 Centennial Mountain Shores Subdivision. For the latest compliance status, check EPA ECHO for current compliance history.
Centennial Mountain Shores Subdivision: frequently asked questions
Who runs Centennial Mountain Shores Subdivision?
Centennial Mountain Shores Subdivision (PWSID ID7220135) is a transient non-community water system privately owned. It is regulated by the ID state drinking water program.
How many people does Centennial Mountain Shores Subdivision serve?
Centennial Mountain Shores Subdivision reports serving 190 people through 75 service connections in Fremont County, Idaho.
Where does Centennial Mountain Shores Subdivision 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 Centennial Mountain Shores Subdivision have any drinking water violations?
EPA's Safe Drinking Water Act records list no violations for this system.
Is Centennial Mountain Shores Subdivision'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 ID state drinking water program.
Where can I find Centennial Mountain Shores Subdivision's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Centennial Mountain Shores Subdivision 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 |
|---|---|---|---|---|
| St Anthony | Fremont | 3,606 | Community | Groundwater |
| Ashton City of | Fremont | 1,129 | Community | Groundwater |
| Teton City of | Fremont | 735 | Community | Groundwater |
| LDS Church Ashton | Fremont | 642 | Transient non-community | Groundwater |
| LDS Church Island Park | Fremont | 450 | Transient non-community | Groundwater |
| Blm Egin Lakes Access Rec Site | Fremont | 400 | 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, “Centennial Mountain Shores Subdivision, PWSID ID7220135, Idaho”, https://aquacensus.com/water-systems/idaho/centennial-mountain-shores-subdivision-id7220135 (data as of October 1, 2026).