Public water system · UTAH21010
ActiveKoosharem
At a glance
Koosharem (PWSID UTAH21010) is an active community water system in Sevier County, Utah. It reports serving 400 people through 210 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, none is health-based, and the most recent began in March 2026.
Dataset updated . Source: EPA SDWIS/ECHO public records.
Population served
400
Service connections
210
Primary source
GW
Groundwater
System type
CWS
Community water system
System record
How does Koosharem compare with other water systems in Sevier County?
By EPA's size categories, Koosharem is a very small system (500 people or fewer). Sevier County has 33 active public water systems. Its population served is about 45% below the county average of 724 people per system, and accounts for 1.7% of the 23,881 people reported by systems filed under the county. Across Utah, the 1,133 active systems average 3,458 people each. Nationally, the average active community water system reports serving 6,703 people, so Koosharem 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. Utah has 540 active community water systems, 48% of the state's 1,133 active systems. Groundwater means the system draws its water from wells or springs fed by underground aquifers. 898 Utah systems (79%) list groundwater as their primary source.
Who owns and regulates Koosharem?
EPA lists Koosharem as owned by a local government. The UT state drinking water program is its primacy agency, the regulator with primary enforcement responsibility for the system under the Safe Drinking Water Act. 15 of the 33 active systems in Sevier County (45%) are also owned by a local government.
Does Koosharem have drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in March 2026. The violations listed here began between February 2022 and March 2026. By type: 8 monitoring and 4 monitoring and reporting. The contaminant or rule involved most often is Revised Total Coliform Rule (8 of them). EPA lists 8 as resolved, 3 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 |
|---|---|---|---|---|
| 2026-03-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Archived |
| 2025-12-30 | Monitoring and reportingLead Consumer Notice · code 66 | Lead and Copper Rulecode 5000 | No | Unaddressed |
| 2025-11-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Archived |
| 2025-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2025-01-01 | Monitoring and reportingMonitoring, Regular · code 03 | Nitratecode 1040 | No | Resolved |
| 2024-11-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Archived |
| 2023-10-01 | Monitoring and reportingFollow-up Or Routine LCR Tap M/R · code 52 | Lead and Copper Rulecode 5000 | No | Resolved |
| 2023-09-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2022-12-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2022-10-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2022-08-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | No | Resolved |
| 2022-02-01 | MonitoringMonitoring, Routine (RTCR) · code 3A | Revised Total Coliform Rulecode 8000 | 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.
Koosharem: frequently asked questions
Who runs Koosharem?
Koosharem (PWSID UTAH21010) is a community water system owned by a local government. It is regulated by the UT state drinking water program.
How many people does Koosharem serve?
Koosharem reports serving 400 people through 210 service connections in Sevier County, Utah.
Where does Koosharem 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 Koosharem have any drinking water violations?
Of the 12 most recent violations in EPA's records, none is health-based, and the most recent began in March 2026. 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 Koosharem'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, none is health-based, and the most recent began in March 2026. For current results, consult the system's annual water quality report, EPA ECHO, or the UT state drinking water program.
Where can I find Koosharem's water quality report?
As a community water system, Koosharem 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 Sevier County
| Water system | County | Population served | Type | Source |
|---|---|---|---|---|
| Richfield City | Sevier | 8,360 | Community | Groundwater |
| Monroe City | Sevier | 2,715 | Community | Groundwater under influence of surface water |
| Salina City Water System | Sevier | 2,692 | Community | Groundwater |
| Elsinore Town Water System | Sevier | 1,105 | Community | Groundwater |
| Aurora City | Sevier | 1,013 | Community | Groundwater |
| Annabella Town Water System | Sevier | 860 | 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, “Koosharem, PWSID UTAH21010, Utah”, https://aquacensus.com/water-systems/utah/koosharem-utah21010 (data as of October 1, 2026).