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Community Water System · PWS UTAH03009

Lewiston City

Lewiston, Utah 84320 - drinking water served from groundwater sources to 2,078 people, tracked in EPA SDWIS and UCMR5.

2,078
People served
238
EPA violations
3
Health-based
Untested
UCMR5 result

The verdict

EPA records 238 drinking-water violations at Lewiston City, 1% of them health-based - above the Utah per-system average.

238
Total EPA violations on record
1%
Health-based (MCL / treatment failure)
2,078
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Lewiston City

Lewiston City is a local-owned community water system that delivers drinking water to 2,078 residents in Lewiston, Utah (Cache County) through 732 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 238 total violations for this system , of which 3 (1%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 213 monitoring and reporting violations are on file. The most recent violation on record dates to 2019.

The most frequently cited contaminant at this system is 1,2,4-Trichlorobenzene, recorded in 9 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%).

Lewiston City's 238 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
2,078
Total Violations
238
Health-Based Violations
3
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
732
County
Cache
School/Daycare
No
MCL Violations
3
Monitoring Violations
213
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
1,2,4-Trichlorobenzene MR 9 2008
cis-1,2-Dichloroethylene MR 9 2008
Xylenes, Total MR 9 2008
o-Dichlorobenzene MR 9 2008
p-Dichlorobenzene MR 9 2008
Vinyl chloride MR 9 2008
1,1-Dichloroethylene MR 9 2008
trans-1,2-Dichloroethylene MR 9 2008
1,2-Dichloroethane MR 9 2008
1,2-Dichloropropane MR 9 2008
Trichloroethylene MR 9 2008
1,1,2-Trichloroethane MR 9 2008
Tetrachloroethylene MR 9 2008
CHLOROBENZENE MR 9 2008
Benzene MR 9 2008
Toluene MR 9 2008
Ethylbenzene MR 9 2008
1,1,1-Trichloroethane MR 9 2008
Styrene MR 9 2008
Carbon tetrachloride MR 9 2008
DICHLOROMETHANE MR 9 2008
Coliform (TCR) MR 4 2013
Coliform (TCR) MCL 3 1991
Lead and Copper Rule MR 3 2011
Barium MR 2 1988
Arsenic MR 2 1988
Mercury MR 2 1988
Chromium MR 2 1988
Selenium MR 2 1988
Fluoride MR 2 1988

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 Lewiston 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 UTAH03009 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
2019 Consumer Confidence Rule Other 2 SDWIS / UTAH03009 / 7000
2013 Coliform (TCR) MR 4 SDWIS / UTAH03009 / 3100
2011 Lead and Copper Rule MR 3 SDWIS / UTAH03009 / 5000
2008 1,2,4-Trichlorobenzene MR 9 SDWIS / UTAH03009 / 2378
2008 cis-1,2-Dichloroethylene MR 9 SDWIS / UTAH03009 / 2380
2008 Xylenes, Total MR 9 SDWIS / UTAH03009 / 2955
2008 o-Dichlorobenzene MR 9 SDWIS / UTAH03009 / 2968
2008 p-Dichlorobenzene MR 9 SDWIS / UTAH03009 / 2969
2008 Vinyl chloride MR 9 SDWIS / UTAH03009 / 2976
2008 1,1-Dichloroethylene MR 9 SDWIS / UTAH03009 / 2977
2008 trans-1,2-Dichloroethylene MR 9 SDWIS / UTAH03009 / 2979
2008 1,2-Dichloroethane MR 9 SDWIS / UTAH03009 / 2980
2008 1,2-Dichloropropane MR 9 SDWIS / UTAH03009 / 2983
2008 Trichloroethylene MR 9 SDWIS / UTAH03009 / 2984
2008 1,1,2-Trichloroethane MR 9 SDWIS / UTAH03009 / 2985

How Lewiston City Compares

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

Metric Lewiston City Utah avg Federal benchmark
Total violations 238 159 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 3 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 2,078 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 Lewiston City water safe to drink? ▼
Lewiston City (PWS ID: UTAH03009) has 238 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 2,078 people using Groundwater sources.
How many people does Lewiston City serve? ▼
Lewiston City serves 2,078 people in Lewiston, Utah. It is a Local-owned system using Groundwater water sources with 732 service connections.
What type of violations does Lewiston City have? ▼
Lewiston City has 238 total violations: 3 health-based violations (MCL exceedances or treatment failures), 213 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Lewiston City water? ▼
No PFAS testing data is available for Lewiston City under the EPA's UCMR5 monitoring program.
What water source does Lewiston City use? ▼
Lewiston 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.