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Los Centenarios, TX Tap Water Quality 2026

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

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

Main Utility: Webb County Water Utilities PWSID: TX2400022 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead was not detected and no violations are open. No PFAS was detected.

B

Los Centenarios earns a B for water quality

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

Lead: not detected
PFAS tested, none detected
114 violations since 2015, 61 health-based
No violations currently open
Los Centenarios's lead level vs. all Texas community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: Not detected — 0% of the federal action level
✓ Lower lead than % of Texas utilities
Population Served
49
~2786 connections
Water Source
Surface water
Drawn from surface water — SDWIS source code SW
Active Violations
0
114 since 2015, all resolved

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
0% of EPA action level
Not detected
Action level: 15 ppb
Lead was not detected at the 90th percentile — the result fell below the laboratory detection limit. That is not the same as an absence of lead in every tap, and older homes with lead service lines can still show higher readings.

Contaminant Violations (2015–Present)

ContaminantTypeMeasuredLimitPeriodStatus
TTHM MCL EXCEEDANCE 0.096 MG/L 0.080 mg/L 2026 Archived
TTHM MCL EXCEEDANCE 0.089 MG/L 0.080 mg/L 2025 Archived
TTHM MCL EXCEEDANCE 0.09 MG/L 0.080 mg/L 2025 Archived
Consumer Confidence Rule OTHER — — 2025 Resolved
TTHM MCL EXCEEDANCE 0.087 MG/L 0.080 mg/L 2025 Archived
TTHM MCL EXCEEDANCE 0.088 MG/L 0.080 mg/L 2025 Archived
Public Notice OTHER — — 2024 Resolved
TTHM MCL EXCEEDANCE 0.089 MG/L 0.080 mg/L 2024 Archived
TTHM MCL EXCEEDANCE 0.084 MG/L 0.080 mg/L 2024 Archived
TTHM MCL EXCEEDANCE 0.085 MG/L 0.080 mg/L 2024 Archived
TTHM MCL EXCEEDANCE 0.086 MG/L 0.080 mg/L 2024 Archived
TTHM MCL EXCEEDANCE 0.085 MG/L 0.080 mg/L 2023 Archived
TTHM MCL EXCEEDANCE 0.088 MG/L 0.080 mg/L 2023 Archived
TTHM MCL EXCEEDANCE 0.085 MG/L 0.080 mg/L 2023 Archived
Total Haloacetic Acids (HAA5) MCL EXCEEDANCE 0.076 MG/L 0.060 mg/L 2023 Resolved
TTHM MCL EXCEEDANCE 0.082 MG/L 0.080 mg/L 2021 Resolved
TTHM MCL EXCEEDANCE 0.083 MG/L 0.080 mg/L 2021 Resolved
TTHM MCL EXCEEDANCE 0.089 MG/L 0.080 mg/L 2021 Resolved
TTHM MCL EXCEEDANCE 0.086 MG/L 0.080 mg/L 2020 Resolved
Public Notice OTHER — — 2020 Resolved
TTHM MCL EXCEEDANCE 0.087 MG/L 0.080 mg/L 2020 Resolved
Public Notice OTHER — — 2020 Resolved
TTHM MCL EXCEEDANCE 0.085 MG/L 0.080 mg/L 2020 Resolved
TTHM MCL EXCEEDANCE 0.082 MG/L 0.080 mg/L 2020 Resolved
Public Notice OTHER — — 2019 Addressed
TTHM MCL EXCEEDANCE 0.083 MG/L 0.080 mg/L 2019 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2019 Unaddressed
TTHM MCL EXCEEDANCE 0.085 MG/L 0.080 mg/L 2019 Resolved
TTHM MONITORING AND REPORTING — 0.080 mg/L 2019 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2019 Archived
Long Term 2 Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2018 Resolved
Consumer Confidence Rule OTHER — — 2018 Resolved
Public Notice OTHER — — 2017 Resolved
Public Notice OTHER — — 2017 Resolved
Long Term 2 Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2017 Resolved
Public Notice OTHER — — 2017 Resolved
Public Notice OTHER — — 2017 Resolved
Long Term 2 Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2017 Resolved
Long Term 2 Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2017 Resolved
Public Notice OTHER — — 2017 Resolved
Public Notice OTHER — — 2017 Resolved
Long Term 2 Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2017 Resolved
Long Term 2 Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2017 Resolved
Long Term 2 Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2017 Resolved
Long Term 2 Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2017 Resolved
Public Notice OTHER — — 2017 Resolved
Long Term 2 Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2017 Resolved
CARBON, TOTAL MONITORING AND REPORTING — TT 2017 Archived
CARBON, TOTAL MONITORING AND REPORTING — TT 2017 Archived
Long Term 2 Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2016 Resolved
Long Term 2 Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2016 Resolved
TTHM MCL EXCEEDANCE 0.083 MG/L 0.080 mg/L 2016 Resolved
Long Term 2 Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2016 Resolved
Public Notice OTHER — — 2016 Resolved
Long Term 2 Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2016 Resolved
Long Term 2 Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2016 Resolved
Long Term 2 Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2016 Resolved
Long Term 2 Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2016 Resolved
Long Term 2 Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2016 Resolved
Long Term 2 Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2016 Resolved
TTHM MCL EXCEEDANCE 0.084 MG/L 0.080 mg/L 2016 Resolved
Long Term 2 Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2016 Resolved
Long Term 2 Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2016 Resolved
Long Term 2 Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2016 Resolved
TTHM MCL EXCEEDANCE 0.083 MG/L 0.080 mg/L 2016 Resolved
Long Term 2 Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2015 Resolved
Surface Water Treatment Rule MONITORING AND REPORTING — — 2015 Resolved
Public Notice OTHER — — 2015 Resolved
Public Notice OTHER — — 2015 Resolved
Surface Water Treatment Rule MONITORING AND REPORTING — — 2015 Resolved
Long Term 2 Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2015 Resolved
Public Notice OTHER — — 2015 Resolved
Public Notice OTHER — — 2015 Resolved
Public Notice OTHER — — 2015 Resolved
Long Term 2 Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2015 Resolved
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2015 Resolved
Surface Water Treatment Rule MONITORING AND REPORTING — — 2015 Resolved
TTHM MCL EXCEEDANCE 0.089 MG/L 0.080 mg/L 2015 Resolved
Public Notice OTHER — — 2015 Resolved
Public Notice OTHER — — 2015 Resolved
Coliform (TCR) MCL EXCEEDANCE — 5% of samples 2015 Resolved
Long Term 2 Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2015 Resolved
Surface Water Treatment Rule MONITORING AND REPORTING — — 2015 Resolved
Public Notice OTHER — — 2015 Resolved
Public Notice OTHER — — 2015 Resolved
Public Notice OTHER — — 2015 Resolved
Long Term 2 Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2015 Resolved
Surface Water Treatment Rule MONITORING AND REPORTING — — 2015 Resolved
Public Notice OTHER — — 2015 Resolved
Public Notice OTHER — — 2015 Resolved
Public Notice OTHER — — 2015 Resolved
Long Term 2 Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2015 Resolved
Surface Water Treatment Rule MONITORING AND REPORTING — — 2015 Resolved
TTHM MCL EXCEEDANCE 0.086 MG/L 0.080 mg/L 2015 Resolved
Public Notice OTHER — — 2015 Resolved
Public Notice OTHER — — 2015 Resolved
Public Notice OTHER — — 2015 Resolved
Long Term 2 Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2015 Resolved
Long Term 2 Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2015 Resolved
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2015 Resolved
Surface Water Treatment Rule MONITORING AND REPORTING — — 2015 Resolved
Long Term 2 Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2015 Resolved
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2015 Resolved
TTHM MCL EXCEEDANCE 0.091 MG/L 0.080 mg/L 2015 Resolved
Long Term 2 Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2015 Resolved
Surface Water Treatment Rule MONITORING AND REPORTING — — 2015 Resolved
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2015 Resolved
Long Term 2 Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2015 Resolved
Surface Water Treatment Rule MONITORING AND REPORTING — — 2015 Resolved
Interim Enhanced Surface Water Treatment Rule MONITORING AND REPORTING — — 2015 Resolved
TTHM MCL EXCEEDANCE 0.084 MG/L 0.080 mg/L 2015 Resolved
Long Term 2 Enhanced Surface Water Treatment Rule TREATMENT TECHNIQUE — — 2015 Resolved
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

114 violations are on record since 2015, of which 61 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility Webb County Water Utilities
PWSID TX2400022
Water source Surface water — Drawn from surface water — SDWIS source code SW
Population served 49
Service connections 2,786
Systems serving this area 1
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Los Centenarios tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open.
Does Los Centenarios water have PFAS? ▼
It was tested for the six regulated PFAS compounds and none were detected.
Who supplies water to Los Centenarios? ▼
Webb County Water Utilities (PWSID TX2400022). Surface water. Drawn from surface water — SDWIS source code SW
When was this system last inspected? ▼
It was last inspected on 2025-09-10. No significant deficiencies were recorded.

What Should Los Centenarios 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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