Public water system · ID4200030
ActiveMcguires Subd
At a glance
Mcguires Subd (PWSID ID4200030) is an active transient non-community water system in Elmore County, Idaho. It reports serving 25 people through 20 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 December 2021.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
25
Service connections
20
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Mcguires Subd compare with other water systems in Elmore County?
By EPA's size categories, Mcguires Subd 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 less than 0.1% 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 transient non-community water system reports serving 144 people, so Mcguires Subd is well 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. 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 Mcguires Subd?
EPA lists Mcguires Subd 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 Mcguires Subd have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in December 2021. The violations listed here began between October 1979 and December 2021. By type: 10 monitoring and reporting, 1 monitoring and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Total coliform bacteria (TCR) (3 of them). EPA lists 11 as archived and 1 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 |
|---|---|---|---|---|
| 2021-12-01 | MonitoringMonitoring, Additional Routine (RTCR) · code 3B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2015-09-01 | Monitoring and reportingMonitoring, Repeat Major (TCR) · code 25 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 2015-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1991-01-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1979-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Chromiumcode 1020 | No | Archived |
| 1979-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Bariumcode 1010 | No | Archived |
| 1979-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Gross alpha (excluding radon and uranium)code 4000 | No | Archived |
| 1979-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Arseniccode 1005 | No | Archived |
| 1979-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Fluoridecode 1025 | No | Archived |
| 1979-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Cadmiumcode 1015 | No | Archived |
| 1979-10-01 | Monitoring and reportingMonitoring, Regular · code 03 | Mercurycode 1035 | No | Archived |
| 1979-10-01 | 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.
Mcguires Subd: frequently asked questions
Who runs Mcguires Subd?
Mcguires Subd (PWSID ID4200030) is a transient non-community water system privately owned. It is regulated by the ID state drinking water program.
How many people does Mcguires Subd serve?
Mcguires Subd reports serving 25 people through 20 service connections in Elmore County, Idaho.
Where does Mcguires Subd 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 Mcguires Subd 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 December 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 Mcguires Subd'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 December 2021. For current results, consult EPA ECHO, or the ID state drinking water program.
Where can I find Mcguires Subd's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Mcguires Subd 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 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 |
| Mellen Subd Water Dist | Elmore | 250 | Community | Purchased groundwater |
| Trinity Estates Water Users Assn | Elmore | 250 | Community | 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, “Mcguires Subd, PWSID ID4200030, Idaho”, https://aquacensus.com/water-systems/idaho/mcguires-subd-id4200030 (data as of October 1, 2026).