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Thoreau, NM Tap Water Quality 2026

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

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

Main Utility: Thoreau Water & Sanitation District PWSID: NM3508817 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 4.30 ppb, 29% of the action level and no violations are open. PFAS has never been sampled at this system.

C

Thoreau earns a C for water quality

Graded on violations and lead, with state inspection findings. PFAS not tested.

Lead: 4.30 ppb — 29% of the federal action level
PFAS never sampled at this system
29 violations since 2015, 3 health-based
No violations currently open
Thoreau's lead level vs. all New Mexico community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 4.30 ppb — 29% of the federal action level
✓ Lower lead than 18% of New Mexico utilities
Population Served
1151
~345 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
0
29 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
29% of EPA action level
4.30 ppb
Action level: 15 ppb
The 90th-percentile lead result is 4.30 ppb, 29% 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 Unaddressed
Public Notice OTHER — — 2025 Unaddressed
Public Notice OTHER — — 2025 Unaddressed
Groundwater Rule TREATMENT TECHNIQUE — — 2024 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2024 Resolved
LEAD AND COPPER RULE REVISIONS REPORTING FAILURE — — 2024 Resolved
LEAD AND COPPER RULE REVISIONS TREATMENT TECHNIQUE — — 2024 Resolved
Consumer Confidence Rule OTHER — — 2024 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2024 Resolved
Groundwater Rule OTHER — — 2024 Resolved
Consumer Confidence Rule OTHER — — 2022 Resolved
Consumer Confidence Rule OTHER — — 2022 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2019 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2019 Archived
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2019 Archived
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2019 Archived
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2019 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2019 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2019 Archived
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2019 Archived
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2019 Archived
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2019 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2019 Archived
E. COLI MONITORING AND REPORTING — 0 2017 Resolved
Chlorine MONITORING AND REPORTING — 4.0 mg/L 2016 Resolved
Public Notice OTHER — — 2016 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2015 Resolved
Total Haloacetic Acids (HAA5) MONITORING AND REPORTING — 0.060 mg/L 2015–2016 Resolved
TTHM MONITORING AND REPORTING — 0.080 mg/L 2015–2016 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

29 violations are on record since 2015, of which 3 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Thoreau Water & Sanitation District
PWSID NM3508817
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served 1,151
Service connections 345
Systems serving this area 1
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Thoreau tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 4.30 ppb, 29% of the action level.
Does Thoreau water have PFAS? ▼
This system has never been sampled for PFAS. EPA's national monitoring covered systems serving 3,300 people or more, so no results exist — which is not evidence that none is present.
Who supplies water to Thoreau? ▼
Thoreau Water & Sanitation District (PWSID NM3508817). Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2024-05-08. Inspectors recorded 2 significant deficiencies.

What Should Thoreau 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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