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Community Water System · PWS NM3502421

Agua Sana Wua

Hernandez, New Mexico 87537 - drinking water served from groundwater sources to 1,514 people, tracked in EPA SDWIS and UCMR5.

1,514
People served
446
EPA violations
216
Health-based
Untested
UCMR5 result

The verdict

EPA records 446 drinking-water violations at Agua Sana Wua, 48% of them health-based - above the New Mexico per-system average.

446
Total EPA violations on record
48%
Health-based (MCL / treatment failure)
1,514
People served by this system
N/A
PFAS compounds detected (UCMR5)

Water Quality Snapshot: Agua Sana Wua

Agua Sana Wua is a local-owned community water system that delivers drinking water to 1,514 residents in Hernandez, New Mexico (Rio Arriba County) through 490 service connections. Its water is drawn from groundwater sources. EPA's Safe Drinking Water Information System records 446 total violations for this system , of which 216 (48%) are health-based, meaning a contaminant exceeded an EPA Maximum Contaminant Level or a required treatment technique failed. A further 122 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 Arsenic, recorded in 192 violations (MCL, 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%).

Agua Sana Wua's 446 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
1,514
Total Violations
446
Health-Based Violations
216
Water Source
Groundwater

System Details

System Type
Community
Owner Type
Local
Connections
490
County
Rio Arriba
School/Daycare
No
MCL Violations
192
Monitoring Violations
122
Treatment Tech Violations
24

Violation History

Contaminant violations recorded by EPA.

Contaminant Category Count Latest
Arsenic MCL 192 2019
Public Notice Other 58 2022
Consumer Confidence Rule Other 45 2024
Chlorine MR 26 2024
Groundwater Rule TT 24 2019
Revised Total Coliform Rule MON 21 2024
TTHM MR 17 2021
Total Haloacetic Acids (HAA5) MR 17 2021
Lead and Copper Rule MR 11 2025
Nitrate-Nitrite MR 10 2006
Arsenic MR 10 2014
Coliform (TCR) MR 6 2004
Revised Total Coliform Rule Other 4 2016
Radium-226 MR 1 2004
Radium-228 MR 1 2004
Combined Uranium MR 1 2004
Gross Alpha, Excl. Radon and U MR 1 2004

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 Agua Sana Wua.

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 NM3502421 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 11 SDWIS / NM3502421 / 5000
2024 Consumer Confidence Rule Other 45 SDWIS / NM3502421 / 7000
2024 Chlorine MR 26 SDWIS / NM3502421 / 0999
2024 Revised Total Coliform Rule MON 21 SDWIS / NM3502421 / 8000
2022 Public Notice Other 58 SDWIS / NM3502421 / 7500
2021 TTHM MR 17 SDWIS / NM3502421 / 2950
2021 Total Haloacetic Acids (HAA5) MR 17 SDWIS / NM3502421 / 2456
2019 Arsenic MCL 192 SDWIS / NM3502421 / 1005
2019 Groundwater Rule TT 24 SDWIS / NM3502421 / 0700
2016 Revised Total Coliform Rule Other 4 SDWIS / NM3502421 / 8000
2014 Arsenic MR 10 SDWIS / NM3502421 / 1005
2006 Nitrate-Nitrite MR 10 SDWIS / NM3502421 / 1038
2004 Coliform (TCR) MR 6 SDWIS / NM3502421 / 3100
2004 Radium-226 MR 1 SDWIS / NM3502421 / 4020
2004 Radium-228 MR 1 SDWIS / NM3502421 / 4030

How Agua Sana Wua Compares

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

Metric Agua Sana Wua New Mexico avg Federal benchmark
Total violations 446 149 SDWA compliance, any non-zero count is a recorded breach
Health-based violations 216 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 1,514 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 Agua Sana Wua water safe to drink? ▼
Agua Sana Wua (PWS ID: NM3502421) has 446 recorded violations in the EPA SDWIS database. No PFAS contamination was detected in UCMR5 testing. This system serves 1,514 people using Groundwater sources.
How many people does Agua Sana Wua serve? ▼
Agua Sana Wua serves 1,514 people in Hernandez, New Mexico. It is a Local-owned system using Groundwater water sources with 490 service connections.
What type of violations does Agua Sana Wua have? ▼
Agua Sana Wua has 446 total violations: 216 health-based violations (MCL exceedances or treatment failures), 122 monitoring/reporting violations, and 24 treatment technique violations. Health-based violations indicate contaminant levels exceeded EPA safe limits.
Has PFAS been detected in Agua Sana Wua water? ▼
No PFAS testing data is available for Agua Sana Wua under the EPA's UCMR5 monitoring program.
What water source does Agua Sana Wua use? ▼
Agua Sana Wua 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.