Public water system · ID7100220
ActiveGem Lake Water System
At a glance
Gem Lake Water System (PWSID ID7100220) is an active non-transient non-community water system in Bonneville County, Idaho. It reports serving 200 people through 3 service connections. Its primary water source is groundwater, and EPA lists it as privately owned. EPA's records list 11 violations for this system; 4 are health-based, and the most recent began in October 2025.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
200
Service connections
3
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Gem Lake Water System compare with other water systems in Bonneville County?
By EPA's size categories, Gem Lake Water System is a very small system (500 people or fewer). Bonneville County has 126 active public water systems. Its population served is well below the county average of 1,089 people per system, and accounts for 0.1% of the 137,194 people reported by systems filed under the county. Across Idaho, the 1,961 active systems average 899 people each. Nationally, the average active non-transient non-community water system reports serving 430 people, so Gem Lake Water System is about half of that figure.
What does “non-transient non-community water system” mean?
A non-transient non-community water system regularly serves at least 25 of the same people for more than six months a year, but not where they live. Schools, factories, office buildings and hospitals with their own supply are typical examples. Idaho has 242 active non-transient non-community water systems, 12% 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 Gem Lake Water System?
EPA lists Gem Lake Water System 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. 99 of the 126 active systems in Bonneville County (79%) are also privately owned.
Does Gem Lake Water System have drinking water violations?
EPA's records list 11 violations for this system; 4 are health-based, and the most recent began in October 2025. The violations listed here began between October 2014 and October 2025. By type: 5 monitoring, 3 contaminant level above the legal limit, 1 monitoring and reporting, 1 public notice, recordkeeping or other and 1 required treatment not met. The contaminant or rule involved most often is Revised Total Coliform Rule (6 of them). EPA lists 6 as resolved, 4 as archived and 1 as unaddressed. 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. Unaddressed means the violation is not resolved or archived and is not yet covered by formal enforcement.
| Began | Violation | Contaminant or rule | Health-based | Status |
|---|---|---|---|---|
| 2025-10-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Archived |
| 2025-04-01 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2024-07-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2023-01-01 | MonitoringMonitoring, Additional Routine (RTCR) · code 3B | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2017-02-27 | Public notice, recordkeeping or otherPublic Notification Violation for NPDWR Violation · code 75 | Public Noticecode 7500 | No | Unaddressed |
| 2016-12-31 | Required treatment not metTreatment Technique, Level 2 Assessment (RTCR) · code 2B | Revised Total Coliform Rulecode 8000 | Yes | Resolved |
| 2016-09-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2016-06-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2015-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 2015-04-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 2014-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
All 11 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.
Gem Lake Water System: frequently asked questions
Who runs Gem Lake Water System?
Gem Lake Water System (PWSID ID7100220) is a non-transient non-community water system privately owned. It is regulated by the ID state drinking water program.
How many people does Gem Lake Water System serve?
Gem Lake Water System reports serving 200 people through 3 service connections in Bonneville County, Idaho.
Where does Gem Lake Water System 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 Gem Lake Water System have any drinking water violations?
EPA's records list 11 violations for this system; 4 are health-based, and the most recent began in October 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 Gem Lake Water System'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 11 violations for this system; 4 are health-based, and the most recent began in October 2025. For current results, consult EPA ECHO, or the ID state drinking water program.
Where can I find Gem Lake Water System's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Gem Lake Water System is a non-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 Bonneville County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Idaho Falls City of | Bonneville | 69,450 | Community | Groundwater |
| Falls Water Company Inc. | Bonneville | 22,650 | Community | Groundwater |
| Ammon City of | Bonneville | 17,338 | Community | Groundwater |
| Iona Water Dept | Bonneville | 2,717 | Community | Groundwater |
| Comore Loma | Bonneville | 1,500 | Community | Groundwater |
| Melaleuca Warehouse Facility | Bonneville | 1,397 | Non-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, “Gem Lake Water System, PWSID ID7100220, Idaho”, https://aquacensus.com/water-systems/idaho/gem-lake-water-system-id7100220 (data as of October 1, 2026).