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Transient Non-Community Water System · PWS NM3560217

Western Refining SW, Gallup Refinery

Gallup, New Mexico 87301 - drinking water served from groundwater sources to 913 people, tracked in EPA SDWIS and UCMR5.

913
People served
167
EPA violations
32
Health-based
Untested
UCMR5 result

The verdict

EPA records 167 drinking-water violations at Western Refining SW, Gallup Refinery, 19% of them health-based - above the New Mexico per-system average.

167
Total EPA violations on record
19%
Health-based (MCL / treatment failure)
913
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Western Refining SW, Gallup Refinery

Western Refining SW, Gallup Refinery is a private-owned transient non-community water system that delivers drinking water to 913 residents in Gallup, New Mexico (McKinley County) through 5 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 167 total violations for this system , of which 32 (19%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 120 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 Chlorine, recorded in 49 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 New Mexico, EPA tracks 1,037 public water systems serving 2,027,497 people, with 154,522 cumulative violations and 38,650 health-based violations on record. About 97% of systems in the state carry at least one violation, and state-wide the average per system is 149 violations. Statewide, 70 of 72 UCMR5-tested systems have reported PFAS detections (97.2%).

Western Refining SW, Gallup Refinery's 167 violations sit above the New Mexico 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
913
Total Violations
167
Health-Based Violations
32
Water Source
Groundwater

System Details

System Type
Transient Non-Community
Owner Type
Private
Connections
5
County
McKinley
School/Daycare
No
MCL Violations
0
Monitoring Violations
120
Treatment Tech Violations
32

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Chlorine MR 49 2018
Groundwater Rule TT 32 2017
Revised Total Coliform Rule MON 23 2020
Total Haloacetic Acids (HAA5) MR 16 2017
Lead and Copper Rule MR 10 2013
TTHM MR 9 2014
Coliform (TCR) MR 9 2007
Public Notice Other 8 2021
Nitrate MR 4 2000
Revised Total Coliform Rule Other 3 2016
Consumer Confidence Rule Other 1 1999

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 Western Refining SW, Gallup Refinery.

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 NM3560217 on SDWIS

Source: EPA SDWIS Federal Reports Search

State Regulator

New Mexico Drinking Water Authority

New Mexico'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 NM 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 Public Notice Other 8 SDWIS / NM3560217 / 7500
2020 Revised Total Coliform Rule MON 23 SDWIS / NM3560217 / 8000
2018 Chlorine MR 49 SDWIS / NM3560217 / 0999
2017 Groundwater Rule TT 32 SDWIS / NM3560217 / 0700
2017 Total Haloacetic Acids (HAA5) MR 16 SDWIS / NM3560217 / 2456
2016 Revised Total Coliform Rule Other 3 SDWIS / NM3560217 / 8000
2014 TTHM MR 9 SDWIS / NM3560217 / 2950
2013 Lead and Copper Rule MR 10 SDWIS / NM3560217 / 5000
2007 Coliform (TCR) MR 9 SDWIS / NM3560217 / 3100
2000 Nitrate MR 4 SDWIS / NM3560217 / 1040
1999 Consumer Confidence Rule Other 1 SDWIS / NM3560217 / 7000

How Western Refining SW, Gallup Refinery Compares

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

Metric Western Refining SW, Gallup Refinery New Mexico avg Federal benchmark
Total violations 167 149 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 32 37.3 Indicates a contaminant exceeded a federal MCL
PFAS detection None 97.2% EPA final rule (2024): PFOA/PFOS MCL = 4.0 ppt
Population served 913 1,955 Sizing context for compliance burden

Sources: EPA SDWIS and EPA National Primary Drinking Water Regulations (40 CFR Part 141). State averages computed across 1,037 regulated public water systems in New Mexico.

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 Western Refining SW, Gallup Refinery water safe to drink? ▼
Western Refining SW, Gallup Refinery (PWS ID: NM3560217) has 167 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 913 people using Groundwater sources.
How many people does Western Refining SW, Gallup Refinery serve? ▼
Western Refining SW, Gallup Refinery serves 913 people in Gallup, New Mexico. It is a Private-owned system using Groundwater water sources with 5 service connections.
What type of violations does Western Refining SW, Gallup Refinery have? ▼
Western Refining SW, Gallup Refinery has 167 total violations: 32 health-based violations (MCL exceedances or treatment failures), 120 monitoring/reporting violations, and 32 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Western Refining SW, Gallup Refinery water? ▼
No PFAS testing data is available for Western Refining SW, Gallup Refinery under the EPA's UCMR5 monitoring program.
What water source does Western Refining SW, Gallup Refinery use? ▼
Western Refining SW, Gallup Refinery uses Groundwater as its primary water source. It is classified as a Transient Non-Community Water System, serving transient populations.
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.