Public water system · ID1400021
ActiveClarkia Water and Sewer Dist
At a glance
Clarkia Water and Sewer Dist (PWSID ID1400021) is an active community water system in Shoshone County, Idaho. It reports serving 53 people through 35 service connections. Its primary water source is groundwater, and EPA lists it as owned by a local government. Of the 12 most recent violations in EPA's records, 10 are health-based, and the most recent began in March 1998.
This page covers its drinking water system only; sewer and wastewater service are not part of EPA's drinking water records.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
53
Service connections
35
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Clarkia Water and Sewer Dist compare with other water systems in Shoshone County?
By EPA's size categories, Clarkia Water and Sewer Dist is a very small system (500 people or fewer). Shoshone County has 37 active public water systems. Its population served is well below the county average of 422 people per system, and accounts for 0.3% of the 15,614 people reported by systems filed under the county. Across Idaho, the 1,961 active systems average 899 people each. Nationally, the average active community water system reports serving 6,703 people, so Clarkia Water and Sewer Dist is well below that figure.
What does “community water system” mean?
A community water system serves at least 15 connections used by year-round residents, or regularly serves at least 25 year-round residents. Homes, apartments and mobile-home parks are served by these. Idaho has 765 active community water systems, 39% 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 Clarkia Water and Sewer Dist?
EPA lists Clarkia Water and Sewer Dist as owned by a local government. 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. 8 of the 37 active systems in Shoshone County (22%) are also owned by a local government.
Does Clarkia Water and Sewer Dist have drinking water violations?
Of the 12 most recent violations in EPA's records, 10 are health-based, and the most recent began in March 1998. The violations listed here began between February 1994 and March 1998. By type: 10 contaminant level above the legal limit and 2 monitoring and reporting. The contaminant or rule involved most often is Total coliform bacteria (TCR) (11 of them). EPA lists 10 as archived and 2 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 |
|---|---|---|---|---|
| 1998-03-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1996-12-01 | Monitoring and reportingMonitoring, Routine Minor (TCR) · code 24 | Total coliform bacteria (TCR)code 3100 | No | Resolved |
| 1996-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 1994-11-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1994-10-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1994-09-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1994-08-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1994-07-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1994-06-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1994-05-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1994-03-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | Archived |
| 1994-02-01 | Contaminant level above the legal limitMaximum Contaminant Level Violation, Monthly (TCR) · code 22 | Total coliform bacteria (TCR)code 3100 | Yes | 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.
Clarkia Water and Sewer Dist: frequently asked questions
Who runs Clarkia Water and Sewer Dist?
Clarkia Water and Sewer Dist (PWSID ID1400021) is a community water system owned by a local government. It is regulated by the ID state drinking water program.
How many people does Clarkia Water and Sewer Dist serve?
Clarkia Water and Sewer Dist reports serving 53 people through 35 service connections in Shoshone County, Idaho.
Where does Clarkia Water and Sewer Dist 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 Clarkia Water and Sewer Dist have any drinking water violations?
Of the 12 most recent violations in EPA's records, 10 are health-based, and the most recent began in March 1998. 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 Clarkia Water and Sewer Dist'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, 10 are health-based, and the most recent began in March 1998. For current results, consult the system's annual water quality report, EPA ECHO, or the ID state drinking water program.
Where can I find Clarkia Water and Sewer Dist's water quality report?
As a community water system, Clarkia Water and Sewer Dist must deliver an annual water quality report, called a Consumer Confidence Report, to its customers by July 1 each year, covering the previous calendar year. The system can provide a copy on request.
Other water systems in Shoshone County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Central Shoshone County Water Dist | Shoshone | 6,098 | Community | Groundwater under influence of surface water |
| E Shoshone County Water Dist Wallace | Shoshone | 2,388 | Community | Surface water |
| Pinehurst Water Dist | Shoshone | 1,950 | Community | Groundwater |
| E Shoshone County Water Dist Mullan | Shoshone | 840 | Community | Surface water |
| Cataldo Water Dist | Shoshone | 680 | Community | Groundwater |
| Lookout Pass Ski Area | Shoshone | 600 | Transient non-community | Groundwater under influence of surface water |
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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, “Clarkia Water and Sewer Dist, PWSID ID1400021, Idaho”, https://aquacensus.com/water-systems/idaho/clarkia-water-and-sewer-dist-id1400021 (data as of October 1, 2026).