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La Union, NM Tap Water Quality 2026

Water quality report for La Union, NM — PFAS, lead and copper results, violation history and state inspection findings from EPA SDWIS.

A look at La Union's drinking water using EPA enforcement records: violations, lead and copper results, PFAS sampling and state inspection findings.

Main Utility: La Union Mds & Wa PWSID: NM3500707 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 1.10 ppb, 7% of the action level and no violations are open. No PFAS was detected.

C

La Union earns a C for water quality

Graded on violations, lead, and PFAS, with state inspection findings.

Lead: 1.10 ppb — 7% of the federal action level
PFAS tested, none detected
6 violations since 2015, 4 health-based
No violations currently open
La Union's lead level vs. all New Mexico community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 1.10 ppb — 7% of the federal action level
✓ Lower lead than 73% of New Mexico utilities
Population Served
997
~456 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
0
6 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
7% of EPA action level
1.10 ppb
Action level: 15 ppb
The 90th-percentile lead result is 1.10 ppb, 7% of the 15 ppb federal action level. The action level is a treatment trigger, not a legal maximum, and it is measured across sampled taps rather than at any single home.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
Public Notice OTHER — — 2026 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2024 Resolved
Arsenic MCL EXCEEDANCE 0.011 MG/L 0.010 mg/L 2015 Resolved
Arsenic MCL EXCEEDANCE 0.014 MG/L 0.010 mg/L 2015 Resolved
Arsenic MCL EXCEEDANCE 0.016 MG/L 0.010 mg/L 2015 Resolved
Arsenic MCL EXCEEDANCE 0.02 MG/L 0.010 mg/L 2015 Resolved
Understanding violation types MCL violations mean a contaminant exceeded the federal maximum limit — the most serious type.
TT (Treatment Technique) violations mean required treatment procedures weren't followed, but don't necessarily mean contamination occurred.

Violation History

6 violations are on record since 2015, of which 4 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility La Union Mds & Wa
PWSID NM3500707
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served 997
Service connections 456
Systems serving this area 1
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is La Union tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 1.10 ppb, 7% of the action level.
Does La Union water have PFAS? ▼
It was tested for the six regulated PFAS compounds and none were detected.
Who supplies water to La Union? ▼
La Union Mds & Wa (PWSID NM3500707). Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2026-01-29. Inspectors recorded 1 significant deficiency.

What Should La Union Residents Do?

1
Read your annual water report
Your supplier publishes a Consumer Confidence Report each July covering the prior year.
2
Check for a lead service line
Lead reaches tap water mainly through service lines and household plumbing. Suppliers now publish an inventory identifying lead lines.
3
Flush before drinking
If water has sat in pipes more than six hours, run the cold tap for two minutes before drinking or cooking.

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