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Los Fresnos, TX Tap Water Quality 2026

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

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

Main Utility: City Of Los Fresnos PWSID: TX0310004 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead is 1.76 ppb, 12% of the action level and no violations are open. No PFAS was detected.

C

Los Fresnos earns a C for water quality

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

Lead: 1.76 ppb — 12% of the federal action level
PFAS tested, none detected
54 violations since 2015, 7 health-based
No violations currently open
Los Fresnos's lead level vs. all Texas community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 1.76 ppb — 12% of the federal action level
✓ Lower lead than 45% of Texas utilities
Population Served
6523
~2003 connections
Water Source
Surface water
Drawn from surface water — SDWIS source code SW
Active Violations
0
54 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
12% of EPA action level
1.76 ppb
Action level: 15 ppb
Copper (Cu)
90th percentile of tap samples. SDWIS reports a copper figure only when a system exceeds the action level, so any value here is an exceedance.
134.6% of EPA action level
1,750 ppb
Action level: 1,300 ppb
The 90th-percentile lead result is 1.76 ppb, 12% 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. Copper reached the action level here; a copper figure appears in SDWIS only when a system triggers it.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
LEAD AND COPPER RULE REVISIONS REPORTING FAILURE — — 2025 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2016 Resolved
Interim Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2016 Resolved
Public Notice OTHER — — 2016 Resolved
Public Notice OTHER — — 2016 Resolved
Interim Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2016 Resolved
Public Notice OTHER — — 2016 Resolved
Public Notice OTHER — — 2016 Resolved
Interim Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2016 Resolved
Interim Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2016 Resolved
Public Notice OTHER — — 2016 Resolved
Interim Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2016 Resolved
Interim Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2016 Resolved
Public Notice OTHER — — 2016 Resolved
Public Notice OTHER — — 2016 Resolved
Interim Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2016 Resolved
Public Notice OTHER — — 2016 Resolved
Public Notice OTHER — — 2016 Resolved
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2016 Resolved
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2016 Resolved
Public Notice OTHER — — 2016 Resolved
Public Notice OTHER — — 2016 Resolved
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2016 Resolved
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2016 Resolved
Public Notice OTHER — — 2016 Resolved
Public Notice OTHER — — 2016 Resolved
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2016 Resolved
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2016 Resolved
Public Notice OTHER — — 2016 Resolved
Public Notice OTHER — — 2016 Resolved
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2016 Resolved
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2016 Resolved
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2016 Resolved
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2016 Resolved
Public Notice OTHER — — 2015 Resolved
Public Notice OTHER — — 2015 Resolved
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2015 Resolved
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2015 Resolved
Public Notice OTHER — — 2015 Resolved
Public Notice OTHER — — 2015 Resolved
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2015 Resolved
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2015 Resolved
Public Notice OTHER — — 2015 Resolved
Public Notice OTHER — — 2015 Resolved
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2015 Resolved
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2015 Resolved
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2015 Resolved
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2015 Resolved
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2015 Resolved
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2015 Resolved
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2015 Resolved
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2015 Resolved
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2015 Resolved
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 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

54 violations are on record since 2015, of which 7 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility City Of Los Fresnos
PWSID TX0310004
Water source Surface water — Drawn from surface water — SDWIS source code SW
Population served 6,523
Service connections 2,003
Systems serving this area 4
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Los Fresnos tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open. Lead is 1.76 ppb, 12% of the action level.
Does Los Fresnos water have PFAS? ▼
It was tested for the six regulated PFAS compounds and none were detected.
Who supplies water to Los Fresnos? ▼
City Of Los Fresnos (PWSID TX0310004), one of 4 systems serving this area. Surface water. Drawn from surface water — SDWIS source code SW
When was this system last inspected? ▼
It was last inspected on 2025-04-02. No significant deficiencies were recorded.

What Should Los Fresnos 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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