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Community Water System · PWS UTAH21010

Koosharem

Koosharem, Utah 84744 - drinking water served from groundwater sources to 400 people, tracked in EPA SDWIS and UCMR5.

400
People served
199
EPA violations
10
Health-based
Untested
UCMR5 result

The verdict

EPA records 199 drinking-water violations at Koosharem, 5% of them health-based - above the Utah per-system average.

199
Total EPA violations on record
5%
Health-based (MCL / treatment failure)
400
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Koosharem

Koosharem is a local-owned community water system that delivers drinking water to 400 residents in Koosharem, Utah (Sevier County) through 210 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 199 total violations for this system , of which 10 (5%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 154 monitoring and reporting violations are on file. The most recent violation on record dates to 2024.

The most frequently cited contaminant at this system is Revised Total Coliform Rule, recorded in 38 violations (MON). This system has not yet been sampled under EPA's UCMR5 PFAS monitoring program, so no PFAS detection data is available here.

Across Utah, EPA tracks 1,068 public water systems serving 3,870,776 people, with 169,784 cumulative violations and 10,671 health-based violations on record. About 98% of systems in the state carry at least one violation, and state-wide the average per system is 159 violations. Statewide, 91 of 129 UCMR5-tested systems have reported PFAS detections (70.5%).

Koosharem's 199 violations sit above the Utah average.

All figures above are sourced directly from EPA SDWIS and UCMR5 public data releases and are updated as EPA publishes new reporting cycles.

Population Served
400
Total Violations
199
Health-Based Violations
10
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
210
County
Sevier
School/Daycare
No
MCL Violations
4
Monitoring Violations
154
Treatment Tech Violations
6

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Revised Total Coliform Rule MON 38 2024
Coliform (TCR) MR 31 2015
Nitrate MR 10 2021
Lead and Copper Rule MR 7 2023
Groundwater Rule TT 6 2016
Barium MR 5 1999
Arsenic MR 5 1999
Cadmium MR 5 1999
Chromium MR 5 1999
Mercury MR 5 1999
Selenium MR 5 1999
Fluoride MR 5 1999
Coliform (TCR) MCL 4 2014
Gross Alpha, Excl. Radon and U MR 3 1984
Coliform (TCR) Other 3 1997
Antimony, Total MR 2 1999
CYANIDE MR 2 1999
Thallium, Total MR 2 1999
Beryllium, Total MR 2 1999
DICHLOROMETHANE MR 1 1990
Tetrachloroethylene MR 1 1990
Toluene MR 1 1990
o-Dichlorobenzene MR 1 1990
Nickel MR 1 1993
Styrene MR 1 1990
CHLOROBENZENE MR 1 1990
Vinyl chloride MR 1 1990
1,1,2-Trichloroethane MR 1 1990
Benzene MR 1 1990
1,2,4-Trichlorobenzene MR 1 1990

Verify This Water System

The figures above are aggregated from EPA's public databases. To verify the underlying records, or to file a complaint, request a Consumer Confidence Report, or check current monitoring status, go directly to the federal and state regulators that enforce the Safe Drinking Water Act for Koosharem.

Federal Source of Truth

EPA SDWIS, Federal Reports

EPA's Safe Drinking Water Information System (SDWIS) holds the federal compliance record for every regulated public water system. Open the system-level report by PWS ID:

View PWS ID UTAH21010 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Utah Drinking Water Authority

Utah's primacy agency administers the Safe Drinking Water Act locally. Search EPA SDWIS for the current state contact, or use the state's public health or environment department portal.

Find UT regulator via EPA SDWIS

Violation Timeline

Each row links to the EPA SDWIS public record for verification. Cross-reference the contaminant code on EPA's federal report to see violation dates, return-to-compliance status, and enforcement actions.

Year (latest) Contaminant Category Count EPA Record
2024 Revised Total Coliform Rule MON 38 SDWIS / UTAH21010 / 8000
2023 Lead and Copper Rule MR 7 SDWIS / UTAH21010 / 5000
2021 Nitrate MR 10 SDWIS / UTAH21010 / 1040
2016 Groundwater Rule TT 6 SDWIS / UTAH21010 / 0700
2015 Coliform (TCR) MR 31 SDWIS / UTAH21010 / 3100
2014 Coliform (TCR) MCL 4 SDWIS / UTAH21010 / 3100
1999 Barium MR 5 SDWIS / UTAH21010 / 1010
1999 Arsenic MR 5 SDWIS / UTAH21010 / 1005
1999 Cadmium MR 5 SDWIS / UTAH21010 / 1015
1999 Chromium MR 5 SDWIS / UTAH21010 / 1020
1999 Mercury MR 5 SDWIS / UTAH21010 / 1035
1999 Selenium MR 5 SDWIS / UTAH21010 / 1045
1999 Fluoride MR 5 SDWIS / UTAH21010 / 1025
1999 Antimony, Total MR 2 SDWIS / UTAH21010 / 1074
1999 CYANIDE MR 2 SDWIS / UTAH21010 / 1024

How Koosharem Compares

Cross-reference this system's record against state averages and the federal MCL framework for context.

Metric Koosharem Utah avg Federal benchmark
Total violations 199 159 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 10 10 Indicates a contaminant exceeded a federal MCL
PFAS detection None 70.5% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 400 3,624 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 1,068 regulated public water systems in Utah.

Federal MCL reference, Safe Drinking Water Act thresholds ▼
Contaminant Federal MCL / Action Level Note
Lead 0 mg/L (Action Level: 0.015 mg/L) Lead and Copper Rule treatment technique
Arsenic 0.010 mg/L (10 ppb) Health-based MCL since 2006
Total Coliform Treatment technique (RTCR) Indicator organism, monitoring trigger
PFOA / PFOS (PFAS) 4.0 ppt each (final 2024 rule) Compliance deadline 2029 (EPA proposed extending to 2031, not yet final as of May 2026)
Nitrate (as N) 10 mg/L Acute health risk for infants

Frequently Asked Questions

Is Koosharem water safe to drink? ▼
Koosharem (PWS ID: UTAH21010) has 199 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 400 people using Groundwater sources.
How many people does Koosharem serve? ▼
Koosharem serves 400 people in Koosharem, Utah. It is a Local-owned system using Groundwater water sources with 210 service connections.
What type of violations does Koosharem have? ▼
Koosharem has 199 total violations: 10 health-based violations (MCL exceedances or treatment failures), 154 monitoring/reporting violations, and 6 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Koosharem water? ▼
No PFAS testing data is available for Koosharem under the EPA's UCMR5 monitoring program.
What water source does Koosharem use? ▼
Koosharem uses Groundwater as its primary water source. It is classified as a Community Water System (CWS), serving residential populations year-round.
Where does this data come from? ▼
All data comes from the EPA Safe Drinking Water Information System (SDWIS) and the UCMR5 PFAS monitoring program. SDWIS tracks compliance for all public water systems regulated under the Safe Drinking Water Act.
Data Sources: EPA Safe Drinking Water Information System (SDWIS), Q4 2025. This data is provided for informational purposes only.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from EPA SDWIS and UCMR5 PFAS monitoring data. See our methodology for details. Retrieved and formatted by PlainWater Editorial

Every figure on PlainWater is rendered directly from EPA SDWIS drinking-water data, no number is typed in by an editor. This system's figures are rendered directly from EPA SDWIS data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.