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Community Water System · PWS UTAH14010

Oak City Water System

Oak City, Utah 84649 - drinking water served from groundwater sources to 660 people, tracked in EPA SDWIS and UCMR5.

660
People served
241
EPA violations
21
Health-based
Untested
UCMR5 result

The verdict

EPA records 241 drinking-water violations at Oak City Water System, 9% of them health-based - above the Utah per-system average.

241
Total EPA violations on record
9%
Health-based (MCL / treatment failure)
660
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Oak City Water System

Oak City Water System is a local-owned community water system that delivers drinking water to 660 residents in Oak City, Utah (Millard County) through 287 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 241 total violations for this system , of which 21 (9%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 188 monitoring and reporting violations are on file. The most recent violation on record dates to 2022.

The most frequently cited contaminant at this system is Chlorine, recorded in 40 violations (MR). 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%).

Oak City Water System's 241 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
660
Total Violations
241
Health-Based Violations
21
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
287
County
Millard
School/Daycare
No
MCL Violations
3
Monitoring Violations
188
Treatment Tech Violations
18

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Chlorine MR 40 2016
Surface Water Treatment Rule MR 27 2017
Groundwater Rule TT 18 2016
E. COLI MR 18 2019
Coliform (TCR) MR 16 2012
Lead and Copper Rule MR 9 2013
Nitrate MR 5 2005
Coliform (TCR) MCL 3 1994
TTHM MR 3 2015
Revised Total Coliform Rule MON 3 2022
Coliform (TCR) Other 3 1992
Total Haloacetic Acids (HAA5) MR 3 2015
Arsenic MR 2 1999
Barium MR 2 1999
Cadmium MR 2 1999
Mercury MR 2 1999
Chromium MR 2 1999
Selenium MR 2 1999
Fluoride MR 2 1999
Antimony, Total MR 2 1999
Beryllium, Total MR 2 1999
Thallium, Total MR 2 1999
CYANIDE MR 2 1999
Vinyl chloride MR 2 1996
Carbon tetrachloride MR 2 1996
1,2-Dichloroethane MR 2 1996
Trichloroethylene MR 2 1996
1,1-Dichloroethylene MR 2 1996
p-Dichlorobenzene MR 2 1996
1,1,1-Trichloroethane MR 2 1996

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 Oak City Water System.

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 UTAH14010 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
2022 Revised Total Coliform Rule MON 3 SDWIS / UTAH14010 / 8000
2019 E. COLI MR 18 SDWIS / UTAH14010 / 3014
2017 Surface Water Treatment Rule MR 27 SDWIS / UTAH14010 / 0200
2016 Chlorine MR 40 SDWIS / UTAH14010 / 0999
2016 Groundwater Rule TT 18 SDWIS / UTAH14010 / 0700
2015 TTHM MR 3 SDWIS / UTAH14010 / 2950
2015 Total Haloacetic Acids (HAA5) MR 3 SDWIS / UTAH14010 / 2456
2013 Lead and Copper Rule MR 9 SDWIS / UTAH14010 / 5000
2012 Coliform (TCR) MR 16 SDWIS / UTAH14010 / 3100
2005 Nitrate MR 5 SDWIS / UTAH14010 / 1040
1999 Arsenic MR 2 SDWIS / UTAH14010 / 1005
1999 Barium MR 2 SDWIS / UTAH14010 / 1010
1999 Cadmium MR 2 SDWIS / UTAH14010 / 1015
1999 Mercury MR 2 SDWIS / UTAH14010 / 1035
1999 Chromium MR 2 SDWIS / UTAH14010 / 1020

How Oak City Water System Compares

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

Metric Oak City Water System Utah avg Federal benchmark
Total violations 241 159 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 21 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 660 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 Oak City Water System water safe to drink? ▼
Oak City Water System (PWS ID: UTAH14010) has 241 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 660 people using Groundwater sources.
How many people does Oak City Water System serve? ▼
Oak City Water System serves 660 people in Oak City, Utah. It is a Local-owned system using Groundwater water sources with 287 service connections.
What type of violations does Oak City Water System have? ▼
Oak City Water System has 241 total violations: 21 health-based violations (MCL exceedances or treatment failures), 188 monitoring/reporting violations, and 18 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Oak City Water System water? ▼
No PFAS testing data is available for Oak City Water System under the EPA's UCMR5 monitoring program.
What water source does Oak City Water System use? ▼
Oak City Water System 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.