Public water system · ID7190160
Active7 C Junction
At a glance
7 C Junction (PWSID ID7190160) is an active transient non-community water system in Custer County, Idaho. It reports serving 100 people through 7 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 8 violations for this system; none is health-based, and the most recent began in July 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
100
Service connections
7
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does 7 C Junction compare with other water systems in Custer County?
By EPA's size categories, 7 C Junction is a very small system (500 people or fewer). Custer County has 57 active public water systems. Its population served is roughly in line with the county average of 102 people per system, and accounts for 1.7% of the 5,823 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 7 C Junction is about 31% 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 7 C Junction?
EPA lists 7 C Junction 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. 30 of the 57 active systems in Custer County (53%) are also privately owned.
Does 7 C Junction have drinking water violations?
EPA's records list 8 violations for this system; none is health-based, and the most recent began in July 2025. The violations listed here began between July 1992 and July 2025. By type: 4 monitoring and 4 monitoring and reporting. The contaminant or rule involved most often is Revised Total Coliform Rule (4 of them). EPA lists 4 as archived and 4 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 |
|---|---|---|---|---|
| 2025-07-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Archived |
| 2022-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2022-01-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2021-10-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2019-04-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 1997-04-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1993-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1992-07-01 | Monitoring and reportingMonitoring, Routine Major (TCR) · code 23 | Total coliform bacteria (TCR)code 3100 | No | Archived |
All 8 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.
7 C Junction: frequently asked questions
Who runs 7 C Junction?
7 C Junction (PWSID ID7190160) is a transient non-community water system privately owned. It is regulated by the ID state drinking water program.
How many people does 7 C Junction serve?
7 C Junction reports serving 100 people through 7 service connections in Custer County, Idaho.
Where does 7 C Junction 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 7 C Junction have any drinking water violations?
EPA's records list 8 violations for this system; none is health-based, and the most recent began in July 2025. 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 7 C Junction'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 8 violations for this system; none is health-based, and the most recent began in July 2025. For current results, consult EPA ECHO, or the ID state drinking water program.
Where can I find 7 C Junction's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. 7 C Junction 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 Custer County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Challis City of | Custer | 900 | Community | Surface water |
| Mackay City of | Custer | 566 | Community | Groundwater |
| Blm Joe T Fallini | Custer | 540 | Transient non-community | Groundwater |
| Usfs Fishook Well | Custer | 460 | Transient non-community | Groundwater |
| Usfs Glacier View Campground | Custer | 314 | Transient non-community | Groundwater |
| Mountain Village Lodge and Restaurant | Custer | 225 | 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, “7 C Junction, PWSID ID7190160, Idaho”, https://aquacensus.com/water-systems/idaho/7-c-junction-id7190160 (data as of October 1, 2026).