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Middle Mesa, NM Tap Water Quality 2026

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

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

Main Utility: Rosa Joint Ventures Water System PWSID: NM3500324 Updated: 2026 Q2
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8 violations currently open

Lead is 2.00 ppb, 13% of the action level. PFAS has never been sampled at this system.

F

Middle Mesa earns an F for water quality

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

Lead: 2.00 ppb — 13% of the federal action level
PFAS never sampled at this system
70 violations since 2015, 34 health-based
8 violations currently open
Middle Mesa's lead level vs. all New Mexico community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 2.00 ppb — 13% of the federal action level
✓ Lower lead than 50% of New Mexico utilities
Population Served
139
~82 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
8
8 open of 70 since 2015

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
13% of EPA action level
2.00 ppb
Action level: 15 ppb
The 90th-percentile lead result is 2.00 ppb, 13% 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
Groundwater Rule TREATMENT TECHNIQUE — — 2025 Unaddressed
Groundwater Rule TREATMENT TECHNIQUE — — 2025 Unaddressed
Groundwater Rule TREATMENT TECHNIQUE — — 2025 Unaddressed
Groundwater Rule TREATMENT TECHNIQUE — — 2025 Unaddressed
Groundwater Rule TREATMENT TECHNIQUE — — 2025 Unaddressed
Groundwater Rule TREATMENT TECHNIQUE — — 2025 Unaddressed
Groundwater Rule TREATMENT TECHNIQUE — — 2025 Unaddressed
Groundwater Rule TREATMENT TECHNIQUE — — 2025 Unaddressed
Groundwater Rule OTHER — — 2025 Unaddressed
E. COLI MONITORING AND REPORTING — 0 2023 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2023 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2023 Resolved
Public Notice OTHER — — 2023 Resolved
Consumer Confidence Rule OTHER — — 2022 Resolved
Public Notice OTHER — — 2022 Resolved
Public Notice OTHER — — 2022 Resolved
Public Notice OTHER — — 2022 Resolved
Public Notice OTHER — — 2021 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2021 Resolved
Selenium MCL EXCEEDANCE 0.06 MG/L 0.05 mg/L 2021 Resolved
Consumer Confidence Rule OTHER — — 2021 Resolved
E. COLI MONITORING AND REPORTING — 0 2021 Resolved
Consumer Confidence Rule OTHER — — 2021 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2021 Resolved
Public Notice OTHER — — 2021 Unaddressed
Revised Total Coliform Rule MONITORING FAILURE — — 2021 Resolved
Revised Total Coliform Rule TREATMENT TECHNIQUE — — 2020 Resolved
Public Notice OTHER — — 2020 Resolved
Selenium MCL EXCEEDANCE 0.07 MG/L 0.05 mg/L 2020 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2020 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2020 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2020 Resolved
Revised Total Coliform Rule MCL EXCEEDANCE — — 2020 Resolved
Public Notice OTHER — — 2020 Resolved
Selenium MONITORING AND REPORTING — 0.05 mg/L 2020 Resolved
Selenium MCL EXCEEDANCE 0.06 MG/L 0.05 mg/L 2020 Resolved
Public Notice OTHER — — 2020 Resolved
Selenium MCL EXCEEDANCE 0.06 MG/L 0.05 mg/L 2020 Resolved
E. COLI MONITORING AND REPORTING — 0 2019 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2019 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2019 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2018 Resolved
Consumer Confidence Rule OTHER — — 2018 Resolved
Consumer Confidence Rule OTHER — — 2018 Resolved
Consumer Confidence Rule OTHER — — 2017 Resolved
Public Notice OTHER — — 2017 Resolved
Public Notice OTHER — — 2017 Resolved
Public Notice OTHER — — 2017 Resolved
Consumer Confidence Rule OTHER — — 2017 Resolved
Public Notice OTHER — — 2017 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2017 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2017 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2017 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2017 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2017 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2017 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2017 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2017 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2017 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2017 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2017 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2017 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2017 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2017 Resolved
Groundwater Rule TREATMENT TECHNIQUE — — 2017 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2016 Resolved
Consumer Confidence Rule OTHER — — 2016 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2016 Resolved
Revised Total Coliform Rule OTHER — — 2016 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 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

8 violations remain open, out of 70 recorded since 2015 (34 health-based).

About the Main Water System

Utility Rosa Joint Ventures Water System
PWSID NM3500324
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served 139
Service connections 82
Systems serving this area 1
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Middle Mesa tap water safe to drink? ▼
No federal limit is exceeded on record. 8 violation(s) remain open. Lead is 2.00 ppb, 13% of the action level.
Does Middle Mesa 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 Middle Mesa? ▼
Rosa Joint Ventures Water System (PWSID NM3500324). Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2025-04-22. Inspectors recorded 4 significant deficiencies.

What Should Middle Mesa 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
Follow the open violation
This system has an unresolved violation. Contact the supplier for its corrective-action schedule.

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