Public water system · ID7190017
ActiveThompson Creek Mine
At a glance
Thompson Creek Mine (PWSID ID7190017) is an active non-transient non-community water system in Custer County, Idaho. It reports serving 190 people through 12 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 April 2009.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
190
Service connections
12
Primary source
GW
Groundwater
System type
NTNCWS
Non-transient non-community water system
System record
How does Thompson Creek Mine compare with other water systems in Custer County?
By EPA's size categories, Thompson Creek Mine is a very small system (500 people or fewer). Custer County has 57 active public water systems. Its population served is about 86% above the county average of 102 people per system, and accounts for 3.3% 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 non-transient non-community water system reports serving 430 people, so Thompson Creek Mine is about 56% below 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 Thompson Creek Mine?
EPA lists Thompson Creek Mine 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 Thompson Creek Mine have drinking water violations?
Of the 12 most recent violations in EPA's records, one is health-based, and the most recent began in April 2009. The violations listed here began between January 2002 and April 2009. By type: 11 monitoring and reporting and 1 contaminant level above the legal limit. The contaminant or rule involved most often is Toluene (2 of them). EPA lists 8 as resolved and 4 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 |
|---|---|---|---|---|
| 2009-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1,1-Trichloroethanecode 2981 | No | Archived |
| 2009-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Toluenecode 2991 | No | Archived |
| 2009-04-01 | Monitoring and reportingMonitoring, Regular · code 03 | Vinyl chloridecode 2976 | No | Archived |
| 2008-01-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Single Sample · code 01 | Arseniccode 1005 | Yes | Archived |
| 2002-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Toluenecode 2991 | No | Resolved |
| 2002-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dichloropropanecode 2983 | No | Resolved |
| 2002-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Vinyl chloridecode 2976 | No | Resolved |
| 2002-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | trans-1,2-Dichloroethylenecode 2979 | No | Resolved |
| 2002-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | o-Dichlorobenzenecode 2968 | No | Resolved |
| 2002-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,2-Dichloroethanecode 2980 | No | Resolved |
| 2002-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | 1,1-Dichloroethylenecode 2977 | No | Resolved |
| 2002-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Trichloroethylenecode 2984 | No | Resolved |
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.
Thompson Creek Mine: frequently asked questions
Who runs Thompson Creek Mine?
Thompson Creek Mine (PWSID ID7190017) is a non-transient non-community water system privately owned. It is regulated by the ID state drinking water program.
How many people does Thompson Creek Mine serve?
Thompson Creek Mine reports serving 190 people through 12 service connections in Custer County, Idaho.
Where does Thompson Creek Mine 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 Thompson Creek Mine 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 April 2009. 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 Thompson Creek Mine'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 April 2009. For current results, consult EPA ECHO, or the ID state drinking water program.
Where can I find Thompson Creek Mine's water quality report?
The annual Consumer Confidence Report requirement applies to community water systems. Thompson Creek Mine 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 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, “Thompson Creek Mine, PWSID ID7190017, Idaho”, https://aquacensus.com/water-systems/idaho/thompson-creek-mine-id7190017 (data as of October 1, 2026).