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Community Water System · PWS UTAH20014

Twin Oaks Local District

Cedar City, Utah 84721 - drinking water served from groundwater sources to 270 people, tracked in EPA SDWIS and UCMR5.

270
People served
226
EPA violations
7
Health-based
Untested
UCMR5 result

The verdict

EPA records 226 drinking-water violations at Twin Oaks Local District, 3% of them health-based - above the Utah per-system average.

226
Total EPA violations on record
3%
Health-based (MCL / treatment failure)
270
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Twin Oaks Local District

Twin Oaks Local District is a private-owned community water system that delivers drinking water to 270 residents in Cedar City, Utah (Sanpete County) through 82 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 226 total violations for this system , of which 7 (3%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 207 monitoring and reporting violations are on file. The most recent violation on record dates to 2021.

The most frequently cited contaminant at this system is Radium-228, recorded in 22 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%).

Twin Oaks Local District's 226 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
270
Total Violations
226
Health-Based Violations
7
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Private
Connections
82
County
Sanpete
School/Daycare
No
MCL Violations
7
Monitoring Violations
207
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Radium-228 MR 22 2021
Gross Alpha, Excl. Radon and U MR 19 2021
Radium-226 MR 19 2021
Combined Radium (-226 and -228) MR 7 2010
Coliform (TCR) MCL 7 2015
Coliform (TCR) MR 6 2011
Combined Uranium MR 6 2010
1,2,4-Trichlorobenzene MR 6 2013
cis-1,2-Dichloroethylene MR 6 2013
DICHLOROMETHANE MR 6 2013
o-Dichlorobenzene MR 6 2013
p-Dichlorobenzene MR 6 2013
1,1-Dichloroethylene MR 6 2013
trans-1,2-Dichloroethylene MR 6 2013
1,2-Dichloroethane MR 6 2013
1,1,2-Trichloroethane MR 6 2013
Tetrachloroethylene MR 6 2013
CHLOROBENZENE MR 6 2013
Benzene MR 6 2013
Styrene MR 6 2013
1,1,1-Trichloroethane MR 6 2013
Carbon tetrachloride MR 6 2013
1,2-Dichloropropane MR 6 2013
Toluene MR 6 2013
Vinyl chloride MR 6 2013
Xylenes, Total MR 6 2013
Ethylbenzene MR 6 2013
Trichloroethylene MR 6 2013
Revised Total Coliform Rule Other 3 2017
Nitrite MR 1 1993

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 Twin Oaks Local District.

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 UTAH20014 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
2021 Radium-228 MR 22 SDWIS / UTAH20014 / 4030
2021 Gross Alpha, Excl. Radon and U MR 19 SDWIS / UTAH20014 / 4000
2021 Radium-226 MR 19 SDWIS / UTAH20014 / 4020
2017 Revised Total Coliform Rule Other 3 SDWIS / UTAH20014 / 8000
2015 Coliform (TCR) MCL 7 SDWIS / UTAH20014 / 3100
2013 1,2,4-Trichlorobenzene MR 6 SDWIS / UTAH20014 / 2378
2013 cis-1,2-Dichloroethylene MR 6 SDWIS / UTAH20014 / 2380
2013 DICHLOROMETHANE MR 6 SDWIS / UTAH20014 / 2964
2013 o-Dichlorobenzene MR 6 SDWIS / UTAH20014 / 2968
2013 p-Dichlorobenzene MR 6 SDWIS / UTAH20014 / 2969
2013 1,1-Dichloroethylene MR 6 SDWIS / UTAH20014 / 2977
2013 trans-1,2-Dichloroethylene MR 6 SDWIS / UTAH20014 / 2979
2013 1,2-Dichloroethane MR 6 SDWIS / UTAH20014 / 2980
2013 1,1,2-Trichloroethane MR 6 SDWIS / UTAH20014 / 2985
2013 Tetrachloroethylene MR 6 SDWIS / UTAH20014 / 2987

How Twin Oaks Local District Compares

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

Metric Twin Oaks Local District Utah avg Federal benchmark
Total violations 226 159 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 7 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 270 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 Twin Oaks Local District water safe to drink? ▼
Twin Oaks Local District (PWS ID: UTAH20014) has 226 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 270 people using Groundwater sources.
How many people does Twin Oaks Local District serve? ▼
Twin Oaks Local District serves 270 people in Cedar City, Utah. It is a Private-owned system using Groundwater water sources with 82 service connections.
What type of violations does Twin Oaks Local District have? ▼
Twin Oaks Local District has 226 total violations: 7 health-based violations (MCL exceedances or treatment failures), 207 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Twin Oaks Local District water? ▼
No PFAS testing data is available for Twin Oaks Local District under the EPA's UCMR5 monitoring program.
What water source does Twin Oaks Local District use? ▼
Twin Oaks Local District 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.