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Community Water System · PWS NM3500921

Cebolla Mdwca

Cebolla, New Mexico 87518 - drinking water served from groundwater sources to 350 people, tracked in EPA SDWIS and UCMR5.

350
People served
483
EPA violations
122
Health-based
Untested
UCMR5 result

The verdict

EPA records 483 drinking-water violations at Cebolla Mdwca, 25% of them health-based - above the New Mexico per-system average.

483
Total EPA violations on record
25%
Health-based (MCL / treatment failure)
350
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Cebolla Mdwca

Cebolla Mdwca is a local-owned community water system that delivers drinking water to 350 residents in Cebolla, New Mexico (Rio Arriba County) through 116 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 483 total violations for this system , of which 122 (25%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 260 monitoring and reporting violations are on file. The most recent violation on record dates to 2025.

The most frequently cited contaminant at this system is Coliform (TCR), recorded in 74 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%).

Cebolla Mdwca's 483 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
350
Total Violations
483
Health-Based Violations
122
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
116
County
Rio Arriba
School/Daycare
No
MCL Violations
62
Monitoring Violations
260
Treatment Tech Violations
60

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Coliform (TCR) MR 74 2001
Coliform (TCR) MCL 62 2001
Revised Total Coliform Rule MON 61 2020
Groundwater Rule TT 53 2023
Lead and Copper Rule MR 50 2025
Consumer Confidence Rule Other 41 2024
Public Notice Other 38 2021
TTHM MR 35 2022
Total Haloacetic Acids (HAA5) MR 35 2022
Surface Water Treatment Rule TT 7 1992
Chlorine MR 5 2012
Groundwater Rule Other 4 2023
Revised Total Coliform Rule Other 4 2016

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 Cebolla Mdwca.

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 NM3500921 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
2025 Lead and Copper Rule MR 50 SDWIS / NM3500921 / 5000
2024 Consumer Confidence Rule Other 41 SDWIS / NM3500921 / 7000
2023 Groundwater Rule TT 53 SDWIS / NM3500921 / 0700
2023 Groundwater Rule Other 4 SDWIS / NM3500921 / 0700
2022 TTHM MR 35 SDWIS / NM3500921 / 2950
2022 Total Haloacetic Acids (HAA5) MR 35 SDWIS / NM3500921 / 2456
2021 Public Notice Other 38 SDWIS / NM3500921 / 7500
2020 Revised Total Coliform Rule MON 61 SDWIS / NM3500921 / 8000
2016 Revised Total Coliform Rule Other 4 SDWIS / NM3500921 / 8000
2012 Chlorine MR 5 SDWIS / NM3500921 / 0999
2001 Coliform (TCR) MR 74 SDWIS / NM3500921 / 3100
2001 Coliform (TCR) MCL 62 SDWIS / NM3500921 / 3100
1992 Surface Water Treatment Rule TT 7 SDWIS / NM3500921 / 0200

How Cebolla Mdwca Compares

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

Metric Cebolla Mdwca New Mexico avg Federal benchmark
Total violations 483 149 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 122 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 350 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 Cebolla Mdwca water safe to drink? ▼
Cebolla Mdwca (PWS ID: NM3500921) has 483 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 350 people using Groundwater sources.
How many people does Cebolla Mdwca serve? ▼
Cebolla Mdwca serves 350 people in Cebolla, New Mexico. It is a Local-owned system using Groundwater water sources with 116 service connections.
What type of violations does Cebolla Mdwca have? ▼
Cebolla Mdwca has 483 total violations: 122 health-based violations (MCL exceedances or treatment failures), 260 monitoring/reporting violations, and 60 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Cebolla Mdwca water? ▼
No PFAS testing data is available for Cebolla Mdwca under the EPA's UCMR5 monitoring program.
What water source does Cebolla Mdwca use? ▼
Cebolla Mdwca 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.