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Community Water System · PWS UTAH03011

Mendon City

Mendon, Utah 84325 - drinking water served from groundwater sources to 1,640 people, tracked in EPA SDWIS and UCMR5.

1,640
People served
155
EPA violations
1
Health-based
Untested
UCMR5 result

The verdict

EPA records 155 drinking-water violations at Mendon City, 1% of them health-based - below the Utah per-system average.

155
Total EPA violations on record
1%
Health-based (MCL / treatment failure)
1,640
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Mendon City

Mendon City is a local-owned community water system that delivers drinking water to 1,640 residents in Mendon, Utah (Cache County) through 441 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 155 total violations for this system , of which 1 (1%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 138 monitoring and reporting violations are on file. The most recent violation on record dates to 2017.

The most frequently cited contaminant at this system is Lead and Copper Rule, recorded in 25 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%).

Mendon City's 155 violations sit below 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
1,640
Total Violations
155
Health-Based Violations
1
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
441
County
Cache
School/Daycare
No
MCL Violations
1
Monitoring Violations
138
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Lead and Copper Rule MR 25 2011
Nitrate MR 11 2009
Nitrite MR 9 1996
Surface Water Treatment Rule MR 9 2017
Gross Alpha, Excl. Radon and U MR 6 1998
Arsenic MR 5 1993
Mercury MR 5 1993
Chromium MR 5 1993
Barium MR 5 1993
Cadmium MR 5 1993
Coliform (TCR) MR 4 2001
Fluoride MR 4 1993
Gross Beta Particle Activity MR 4 1998
Selenium MR 4 1993
CYANIDE MR 3 1993
Revised Total Coliform Rule RPT 3 2017
Thallium, Total MR 3 1993
Nickel MR 3 1993
Beryllium, Total MR 3 1993
Antimony, Total MR 3 1993
Benzene MR 1 1990
Carbon tetrachloride MR 1 1990
1,1,1-Trichloroethane MR 1 1990
1,2-Dichloropropane MR 1 1990
Ethylbenzene MR 1 1990
o-Dichlorobenzene MR 1 1990
Styrene MR 1 1990
Tetrachloroethylene MR 1 1990
Toluene MR 1 1990
trans-1,2-Dichloroethylene 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 Mendon City.

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 UTAH03011 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
2017 Surface Water Treatment Rule MR 9 SDWIS / UTAH03011 / 0200
2017 Revised Total Coliform Rule RPT 3 SDWIS / UTAH03011 / 8000
2011 Lead and Copper Rule MR 25 SDWIS / UTAH03011 / 5000
2009 Nitrate MR 11 SDWIS / UTAH03011 / 1040
2001 Coliform (TCR) MR 4 SDWIS / UTAH03011 / 3100
2000 Coliform (TCR) Other 1 SDWIS / UTAH03011 / 3100
1999 Coliform (TCR) MCL 1 SDWIS / UTAH03011 / 3100
1998 Gross Alpha, Excl. Radon and U MR 6 SDWIS / UTAH03011 / 4000
1998 Gross Beta Particle Activity MR 4 SDWIS / UTAH03011 / 4100
1996 Nitrite MR 9 SDWIS / UTAH03011 / 1041
1993 Arsenic MR 5 SDWIS / UTAH03011 / 1005
1993 Mercury MR 5 SDWIS / UTAH03011 / 1035
1993 Chromium MR 5 SDWIS / UTAH03011 / 1020
1993 Barium MR 5 SDWIS / UTAH03011 / 1010
1993 Cadmium MR 5 SDWIS / UTAH03011 / 1015

How Mendon City Compares

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

Metric Mendon City Utah avg Federal benchmark
Total violations 155 159 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 1 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 1,640 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 Mendon City water safe to drink? ▼
Mendon City (PWS ID: UTAH03011) has 155 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 1,640 people using Groundwater sources.
How many people does Mendon City serve? ▼
Mendon City serves 1,640 people in Mendon, Utah. It is a Local-owned system using Groundwater water sources with 441 service connections.
What type of violations does Mendon City have? ▼
Mendon City has 155 total violations: 1 health-based violations (MCL exceedances or treatment failures), 138 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Mendon City water? ▼
No PFAS testing data is available for Mendon City under the EPA's UCMR5 monitoring program.
What water source does Mendon City use? ▼
Mendon City 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.