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Community Water System · PWS NV0000248

Winnemucca City Of

Winnemucca, Nevada 89445 - drinking water served from groundwater sources to 8,518 people, tracked in EPA SDWIS and UCMR5.

8,518
People served
223
EPA violations
9
Health-based
No PFAS
UCMR5 result

The verdict

EPA records 223 drinking-water violations at Winnemucca City Of, 4% of them health-based - above the Nevada per-system average.

223
Total EPA violations on record
4%
Health-based (MCL / treatment failure)
8,518
People served by this system
0
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Winnemucca City Of

Winnemucca City Of is a local-owned community water system that delivers drinking water to 8,518 residents in Winnemucca, Nevada (Humboldt County) through 3,934 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 223 total violations for this system , of which 9 (4%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 202 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 Nitrate, recorded in 20 violations (MR). This system was sampled under EPA's UCMR5 PFAS monitoring program and no PFAS compounds were detected above the minimum reporting level.

Across Nevada, EPA tracks 589 public water systems serving 3,455,285 people, with 56,333 cumulative violations and 6,657 health-based violations on record. About 93% of systems in the state carry at least one violation, and state-wide the average per system is 95.6 violations. Statewide, 50 of 57 UCMR5-tested systems have reported PFAS detections (87.7%).

Winnemucca City Of's 223 violations sit above the Nevada 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
8,518
Total Violations
223
Health-Based Violations
9
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
3,934
County
Humboldt
School/Daycare
No
MCL Violations
9
Monitoring Violations
202
Treatment Tech Violations
0

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Nitrate MR 20 2024
Coliform (TCR) MCL 9 2013
Vinyl chloride MR 8 2004
1,1-Dichloroethylene MR 8 2004
trans-1,2-Dichloroethylene MR 8 2004
1,2-Dichloropropane MR 8 2004
Trichloroethylene MR 8 2004
Toluene MR 8 2004
Ethylbenzene MR 8 2004
DICHLOROMETHANE MR 8 2004
1,1,2-Trichloroethane MR 8 2004
1,2,4-Trichlorobenzene MR 8 2004
cis-1,2-Dichloroethylene MR 8 2004
Xylenes, Total MR 8 2004
o-Dichlorobenzene MR 8 2004
p-Dichlorobenzene MR 8 2004
1,2-Dichloroethane MR 8 2004
Carbon tetrachloride MR 8 2004
Styrene MR 8 2004
CHLOROBENZENE MR 8 2004
Tetrachloroethylene MR 8 2004
1,1,1-Trichloroethane MR 8 2004
Benzene MR 8 2004
Chlorine MR 6 2010
Coliform (TCR) MR 4 1999
Nitrite MR 3 2008
Lead and Copper Rule MR 1 1993
Coliform (Pre-TCR) Other 1 1980

PFAS Testing Results (UCMR5)

Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 348 samples detected PFAS.

Contaminant Date Result MRL Status
6:2 FTS 8/26/2024 <5.00 ppt 5.00 ppt Not Detected
11Cl-PF3OUdS 8/26/2024 <5.00 ppt 5.00 ppt Not Detected
PFBS 8/26/2024 <3.00 ppt 3.00 ppt Not Detected
PFHpA 8/26/2024 <3.00 ppt 3.00 ppt Not Detected
PFHxS 8/26/2024 <3.00 ppt 3.00 ppt Not Detected
PFNA 8/26/2024 <4.00 ppt 4.00 ppt Not Detected
PFOS 8/26/2024 <4.00 ppt 4.00 ppt Not Detected
PFOA 8/26/2024 <4.00 ppt 4.00 ppt Not Detected
PFDoA 8/26/2024 <3.00 ppt 3.00 ppt Not Detected
PFHxA 8/26/2024 <3.00 ppt 3.00 ppt Not Detected
PFUnA 8/26/2024 <2.00 ppt 2.00 ppt Not Detected
9Cl-PF3ONS 8/26/2024 <2.00 ppt 2.00 ppt Not Detected
ADONA 8/26/2024 <3.00 ppt 3.00 ppt Not Detected
PFDA 8/26/2024 <3.00 ppt 3.00 ppt Not Detected
PFBA 8/26/2024 <5.00 ppt 5.00 ppt Not Detected
PFPeA 8/26/2024 <3.00 ppt 3.00 ppt Not Detected
4:2 FTS 8/26/2024 <3.00 ppt 3.00 ppt Not Detected
8:2 FTS 8/26/2024 <5.00 ppt 5.00 ppt Not Detected
PFMPA 8/26/2024 <4.00 ppt 4.00 ppt Not Detected
PFMBA 8/26/2024 <3.00 ppt 3.00 ppt Not Detected
NFDHA 8/26/2024 <20.00 ppt 20.00 ppt Not Detected
PFPeS 8/26/2024 <4.00 ppt 4.00 ppt Not Detected
PFHpS 8/26/2024 <3.00 ppt 3.00 ppt Not Detected
HFPO-DA 8/26/2024 <5.00 ppt 5.00 ppt Not Detected
PFEESA 8/26/2024 <3.00 ppt 3.00 ppt Not Detected
PFTA 8/26/2024 <8.00 ppt 8.00 ppt Not Detected
NMeFOSAA 8/26/2024 <6.00 ppt 6.00 ppt Not Detected
PFTrDA 8/26/2024 <7.00 ppt 7.00 ppt Not Detected
NEtFOSAA 8/26/2024 <5.00 ppt 5.00 ppt Not Detected
PFOA 6/24/2024 <4.00 ppt 4.00 ppt Not Detected
9Cl-PF3ONS 6/24/2024 <2.00 ppt 2.00 ppt Not Detected
ADONA 6/24/2024 <3.00 ppt 3.00 ppt Not Detected
11Cl-PF3OUdS 6/24/2024 <5.00 ppt 5.00 ppt Not Detected
HFPO-DA 6/24/2024 <5.00 ppt 5.00 ppt Not Detected
PFBA 6/24/2024 <5.00 ppt 5.00 ppt Not Detected
PFUnA 6/24/2024 <2.00 ppt 2.00 ppt Not Detected
PFHxA 6/24/2024 <3.00 ppt 3.00 ppt Not Detected
6:2 FTS 6/24/2024 <5.00 ppt 5.00 ppt Not Detected
PFTA 6/24/2024 <8.00 ppt 8.00 ppt Not Detected
PFMPA 6/24/2024 <4.00 ppt 4.00 ppt Not Detected
PFPeA 6/24/2024 <3.00 ppt 3.00 ppt Not Detected
PFMBA 6/24/2024 <3.00 ppt 3.00 ppt Not Detected
PFEESA 6/24/2024 <3.00 ppt 3.00 ppt Not Detected
NFDHA 6/24/2024 <20.00 ppt 20.00 ppt Not Detected
PFPeS 6/24/2024 <4.00 ppt 4.00 ppt Not Detected
PFHpS 6/24/2024 <3.00 ppt 3.00 ppt Not Detected
4:2 FTS 6/24/2024 <3.00 ppt 3.00 ppt Not Detected
PFDoA 6/24/2024 <3.00 ppt 3.00 ppt Not Detected
PFHpA 6/24/2024 <3.00 ppt 3.00 ppt Not Detected
PFDA 6/24/2024 <3.00 ppt 3.00 ppt Not Detected

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 Winnemucca City Of.

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 NV0000248 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

Nevada Drinking Water Authority

Nevada'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 NV 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 Nitrate MR 20 SDWIS / NV0000248 / 1040
2013 Coliform (TCR) MCL 9 SDWIS / NV0000248 / 3100
2010 Chlorine MR 6 SDWIS / NV0000248 / 0999
2008 Nitrite MR 3 SDWIS / NV0000248 / 1041
2004 Vinyl chloride MR 8 SDWIS / NV0000248 / 2976
2004 1,1-Dichloroethylene MR 8 SDWIS / NV0000248 / 2977
2004 trans-1,2-Dichloroethylene MR 8 SDWIS / NV0000248 / 2979
2004 1,2-Dichloropropane MR 8 SDWIS / NV0000248 / 2983
2004 Trichloroethylene MR 8 SDWIS / NV0000248 / 2984
2004 Toluene MR 8 SDWIS / NV0000248 / 2991
2004 Ethylbenzene MR 8 SDWIS / NV0000248 / 2992
2004 DICHLOROMETHANE MR 8 SDWIS / NV0000248 / 2964
2004 1,1,2-Trichloroethane MR 8 SDWIS / NV0000248 / 2985
2004 1,2,4-Trichlorobenzene MR 8 SDWIS / NV0000248 / 2378
2004 cis-1,2-Dichloroethylene MR 8 SDWIS / NV0000248 / 2380

How Winnemucca City Of Compares

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

Metric Winnemucca City Of Nevada avg Federal benchmark
Total violations 223 95.6 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 9 11.3 Indicates a contaminant exceeded a federal MCL
PFAS detection None 87.7% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 8,518 5,866 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 589 regulated public water systems in Nevada.

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 Winnemucca City Of water safe to drink?
Winnemucca City Of (PWS ID: NV0000248) has 223 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 8,518 people using Groundwater sources.
How many people does Winnemucca City Of serve?
Winnemucca City Of serves 8,518 people in Winnemucca, Nevada. It is a Local-owned system using Groundwater water sources with 3,934 service connections.
What type of violations does Winnemucca City Of have?
Winnemucca City Of has 223 total violations: 9 health-based violations (MCL exceedances or treatment failures), 202 monitoring/reporting violations, and 0 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Winnemucca City Of water?
No. Winnemucca City Of was tested for PFAS under the EPA's UCMR5 monitoring program and no PFAS contamination was detected.
What water source does Winnemucca City Of use?
Winnemucca City Of 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. PFAS data from EPA UCMR5 monitoring program (2023-2025). This data is provided for informational purposes only.
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.