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States → New Mexico

Community Water System · PWS NM3500321

Barranco Mdwca

Abiquiu, New Mexico 87510 - drinking water served from groundwater sources to 97 people, tracked in EPA SDWIS and UCMR5.

97
People served
514
EPA violations
33
Health-based
Untested
UCMR5 result

The verdict

EPA records 514 drinking-water violations at Barranco Mdwca, 6% of them health-based - above the New Mexico per-system average.

514
Total EPA violations on record
6%
Health-based (MCL / treatment failure)
97
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Barranco Mdwca

Barranco Mdwca is a local-owned community water system that delivers drinking water to 97 residents in Abiquiu, New Mexico (Rio Arriba County) through 35 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 514 total violations for this system , of which 33 (6%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 395 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 Lead and Copper Rule, recorded in 20 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%).

Barranco Mdwca's 514 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
97
Total Violations
514
Health-Based Violations
33
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
35
County
Rio Arriba
School/Daycare
No
MCL Violations
0
Monitoring Violations
395
Treatment Tech Violations
33

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Lead and Copper Rule MR 20 2014
Groundwater Rule TT 16 2017
Surface Water Treatment Rule TT 14 2004
BHC-GAMMA MR 9 2008
Methoxychlor MR 9 2008
Diquat MR 9 2008
Endothall MR 9 2008
Glyphosate MR 9 2008
OXAMYL MR 9 2008
Simazine MR 9 2008
Di(2-ethylhexyl) phthalate MR 9 2008
Picloram MR 9 2008
Hexachlorocyclopentadiene MR 9 2008
Aldicarb sulfoxide MR 9 2008
Aldicarb sulfone MR 9 2008
Aldicarb MR 9 2008
Heptachlor MR 9 2008
Benzo(a)pyrene MR 9 2008
Pentachlorophenol MR 9 2008
1,2-DIBROMO-3-CHLOROPROPANE MR 9 2008
ETHYLENE DIBROMIDE MR 9 2008
Chlordane MR 9 2008
Endrin MR 9 2008
Toxaphene MR 9 2008
Dalapon MR 9 2008
Di(2-ethylhexyl) adipate MR 9 2008
Atrazine MR 9 2008
LASSO MR 9 2008
Heptachlor epoxide MR 9 2008
2,4,5-TP MR 9 2008

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 Barranco 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 NM3500321 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 LEAD AND COPPER RULE REVISIONS TT 3 SDWIS / NM3500321 / 5200
2024 LEAD AND COPPER RULE REVISIONS RPT 3 SDWIS / NM3500321 / 5200
2019 Consumer Confidence Rule Other 5 SDWIS / NM3500321 / 7000
2018 Public Notice Other 8 SDWIS / NM3500321 / 7500
2018 Total Haloacetic Acids (HAA5) MR 4 SDWIS / NM3500321 / 2456
2017 Groundwater Rule TT 16 SDWIS / NM3500321 / 0700
2016 Chlorine MR 4 SDWIS / NM3500321 / 0999
2016 Revised Total Coliform Rule MON 4 SDWIS / NM3500321 / 8000
2014 Lead and Copper Rule MR 20 SDWIS / NM3500321 / 5000
2013 Coliform (TCR) MR 7 SDWIS / NM3500321 / 3100
2009 Xylenes, Total MR 3 SDWIS / NM3500321 / 2955
2009 DICHLOROMETHANE MR 3 SDWIS / NM3500321 / 2964
2009 Vinyl chloride MR 3 SDWIS / NM3500321 / 2976
2009 1,1-Dichloroethylene MR 3 SDWIS / NM3500321 / 2977
2009 trans-1,2-Dichloroethylene MR 3 SDWIS / NM3500321 / 2979

How Barranco Mdwca Compares

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

Metric Barranco Mdwca New Mexico avg Federal benchmark
Total violations 514 149 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 33 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 97 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 Barranco Mdwca water safe to drink? ▼
Barranco Mdwca (PWS ID: NM3500321) has 514 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 97 people using Groundwater sources.
How many people does Barranco Mdwca serve? ▼
Barranco Mdwca serves 97 people in Abiquiu, New Mexico. It is a Local-owned system using Groundwater water sources with 35 service connections.
What type of violations does Barranco Mdwca have? ▼
Barranco Mdwca has 514 total violations: 33 health-based violations (MCL exceedances or treatment failures), 395 monitoring/reporting violations, and 33 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Barranco Mdwca water? ▼
No PFAS testing data is available for Barranco Mdwca under the EPA's UCMR5 monitoring program.
What water source does Barranco Mdwca use? ▼
Barranco 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.