Public water system · ID5240011
ActiveGridley Island Water Users
At a glance
Gridley Island Water Users (PWSID ID5240011) is an active transient non-community water system in Gooding County, Idaho. It reports serving 32 people through 17 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 10 violations for this system; none is health-based, and the most recent began in December 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
32
Service connections
17
Primary source
GW
Groundwater
System type
TNCWS
Transient non-community water system
System record
How does Gridley Island Water Users compare with other water systems in Gooding County?
By EPA's size categories, Gridley Island Water Users is a very small system (500 people or fewer). Gooding County has 26 active public water systems. Its population served is well below the county average of 363 people per system, and accounts for 0.3% of the 9,437 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 Gridley Island Water Users 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 Gridley Island Water Users?
EPA lists Gridley Island Water Users 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. 17 of the 26 active systems in Gooding County (65%) are also privately owned.
Does Gridley Island Water Users have drinking water violations?
EPA's records list 10 violations for this system; none is health-based, and the most recent began in December 2025. The violations listed here began between April 1991 and December 2025. By type: 7 monitoring and reporting, 2 monitoring and 1 public notice, recordkeeping or other. The contaminant or rule involved most often is Nitrate (3 of them). EPA lists 5 as archived and 5 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 |
|---|---|---|---|---|
| 2025-12-01 | MonitoringMonitoring, Additional Routine (RTCR) · code 3B | Revised Total Coliform Rulecode 8000 | No | Archived |
| 2025-01-05 | Public notice, recordkeeping or otherFailure to Consult with State · code 20 | Groundwater Rulecode 0700 | No | Resolved |
| 2022-06-01 | MonitoringMonitoring, Additional Routine (RTCR) · code 3B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2017-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitritecode 1041 | No | Archived |
| 2007-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2005-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2000-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1997-01-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1995-12-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
| 1991-04-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Archived |
All 10 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.
Gridley Island Water Users: frequently asked questions
Who runs Gridley Island Water Users?
Gridley Island Water Users (PWSID ID5240011) is a transient non-community water system privately owned. It is regulated by the ID state drinking water program.
How many people does Gridley Island Water Users serve?
Gridley Island Water Users reports serving 32 people through 17 service connections in Gooding County, Idaho.
Where does Gridley Island Water Users 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 Gridley Island Water Users have any drinking water violations?
EPA's records list 10 violations for this system; none is health-based, and the most recent began in December 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 Gridley Island Water Users' 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 10 violations for this system; none is health-based, and the most recent began in December 2025. For current results, consult EPA ECHO, or the ID state drinking water program.
Where can I find Gridley Island Water Users' water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Gridley Island Water Users 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 Gooding County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Gooding City of | Gooding | 3,706 | Community | Groundwater |
| Wendell City of | Gooding | 3,000 | Community | Groundwater |
| Hagerman City of | Gooding | 988 | Community | Groundwater |
| Bliss City of | Gooding | 384 | Community | Groundwater |
| Glanbia Foods Inc. | Gooding | 250 | Non-transient non-community | Groundwater |
| LDS Church Hagerman | Gooding | 221 | 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, “Gridley Island Water Users, PWSID ID5240011, Idaho”, https://aquacensus.com/water-systems/idaho/gridley-island-water-users-id5240011 (data as of October 1, 2026).