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States → New Mexico

Community Water System · PWS NM3533021

Lybrook Mdwca

Aztec, New Mexico 87410 - drinking water served from groundwater sources to 175 people, tracked in EPA SDWIS and UCMR5.

175
People served
231
EPA violations
75
Health-based
Untested
UCMR5 result

The verdict

EPA records 231 drinking-water violations at Lybrook Mdwca, 32% of them health-based - above the New Mexico per-system average.

231
Total EPA violations on record
32%
Health-based (MCL / treatment failure)
175
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Lybrook Mdwca

Lybrook Mdwca is a local-owned community water system that delivers drinking water to 175 residents in Aztec, New Mexico (Rio Arriba County) through 69 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 231 total violations for this system , of which 75 (32%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 72 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 Groundwater Rule, recorded in 52 violations (TT, health-based). 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%).

Lybrook Mdwca's 231 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
175
Total Violations
231
Health-Based Violations
75
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
69
County
Rio Arriba
School/Daycare
No
MCL Violations
23
Monitoring Violations
72
Treatment Tech Violations
52

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Groundwater Rule TT 52 2024
Revised Total Coliform Rule MON 47 2022
Public Notice Other 33 2024
Consumer Confidence Rule Other 33 2022
Coliform (TCR) MCL 23 2015
Coliform (TCR) MR 10 2016
Lead and Copper Rule MR 8 2015
E. COLI MR 7 2022
Revised Total Coliform Rule Other 5 2016
Groundwater Rule Other 4 2023

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 Lybrook 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 NM3533021 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
2024 Groundwater Rule TT 52 SDWIS / NM3533021 / 0700
2024 Public Notice Other 33 SDWIS / NM3533021 / 7500
2023 Groundwater Rule Other 4 SDWIS / NM3533021 / 0700
2022 Revised Total Coliform Rule MON 47 SDWIS / NM3533021 / 8000
2022 Consumer Confidence Rule Other 33 SDWIS / NM3533021 / 7000
2022 E. COLI MR 7 SDWIS / NM3533021 / 3014
2016 Coliform (TCR) MR 10 SDWIS / NM3533021 / 3100
2016 Revised Total Coliform Rule Other 5 SDWIS / NM3533021 / 8000
2015 Coliform (TCR) MCL 23 SDWIS / NM3533021 / 3100
2015 Lead and Copper Rule MR 8 SDWIS / NM3533021 / 5000

How Lybrook Mdwca Compares

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

Metric Lybrook Mdwca New Mexico avg Federal benchmark
Total violations 231 149 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 75 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 175 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 Lybrook Mdwca water safe to drink? ▼
Lybrook Mdwca (PWS ID: NM3533021) has 231 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 175 people using Groundwater sources.
How many people does Lybrook Mdwca serve? ▼
Lybrook Mdwca serves 175 people in Aztec, New Mexico. It is a Local-owned system using Groundwater water sources with 69 service connections.
What type of violations does Lybrook Mdwca have? ▼
Lybrook Mdwca has 231 total violations: 75 health-based violations (MCL exceedances or treatment failures), 72 monitoring/reporting violations, and 52 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Lybrook Mdwca water? ▼
No PFAS testing data is available for Lybrook Mdwca under the EPA's UCMR5 monitoring program.
What water source does Lybrook Mdwca use? ▼
Lybrook 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.