Public water system · ID4200096
ActiveOakleaf Subdivision
At a glance
Oakleaf Subdivision (PWSID ID4200096) is an active community water system in Elmore County, Idaho. It reports serving 71 people through 24 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 2 violations for this system; all are health-based, and the most recent began in June 2021.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
71
Service connections
24
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Oakleaf Subdivision compare with other water systems in Elmore County?
By EPA's size categories, Oakleaf Subdivision is a very small system (500 people or fewer). Elmore County has 44 active public water systems. Its population served is well below the county average of 607 people per system, and accounts for 0.3% of the 26,726 people reported by systems filed under the county. Across Idaho, the 1,961 active systems average 899 people each. Nationally, the average active community water system reports serving 6,703 people, so Oakleaf Subdivision 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. Idaho has 765 active community water systems, 39% 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 Oakleaf Subdivision?
EPA lists Oakleaf 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. 39 of the 44 active systems in Elmore County (89%) are also privately owned.
Does Oakleaf Subdivision have drinking water violations?
EPA's records list 2 violations for this system; all are health-based, and the most recent began in June 2021. The violations listed here began between July 2009 and June 2021. By type: 1 required treatment not met and 1 contaminant level above the legal limit. The contaminants or rules involved are Groundwater Rule and Total coliform bacteria (TCR). EPA lists 1 as resolved and 1 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 |
|---|---|---|---|---|
| 2021-06-01 | Required treatment not metFailure To Address Deficiency · code 45 | Groundwater Rulecode 0700 | Yes | Resolved |
| 2009-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
All 2 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.
Oakleaf Subdivision: frequently asked questions
Who runs Oakleaf Subdivision?
Oakleaf Subdivision (PWSID ID4200096) is a community water system privately owned. It is regulated by the ID state drinking water program.
How many people does Oakleaf Subdivision serve?
Oakleaf Subdivision reports serving 71 people through 24 service connections in Elmore County, Idaho.
Where does Oakleaf 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 Oakleaf Subdivision have any drinking water violations?
EPA's records list 2 violations for this system; all are health-based, and the most recent began in June 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 Oakleaf 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 records list 2 violations for this system; all are health-based, and the most recent began in June 2021. For current results, consult the system's annual water quality report, EPA ECHO, or the ID state drinking water program.
Where can I find Oakleaf Subdivision's water quality report?
As a community water system, Oakleaf Subdivision 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 Elmore County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Mountain Home, City of | Elmore | 14,651 | Community | Groundwater |
| Mountain Home Air Force Base | Elmore | 7,500 | Community | Groundwater |
| Glenns Ferry City of | Elmore | 1,282 | Community | Surface water |
| Trinity Estates Water Users Assn | Elmore | 250 | Community | Groundwater |
| Mellen Subd Water Dist | Elmore | 250 | Community | Purchased groundwater |
| Canyon Creek Mobile Home Park | Elmore | 243 | 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, “Oakleaf Subdivision, PWSID ID4200096, Idaho”, https://aquacensus.com/water-systems/idaho/oakleaf-subdivision-id4200096 (data as of October 1, 2026).