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San Juan, TX Tap Water Quality 2026

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

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

Main Utility: City Of San Juan PWSID: TX1080010 Updated: 2026 Q2
✅

No federal limits exceeded on record

Lead was not detected and no violations are open. PFAS was detected below the federal limit.

A

San Juan earns an A for water quality

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

Lead: not detected
PFAS detected below the federal limit
6 violations since 2015, 0 health-based
No violations currently open
San Juan'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
20272
~7317 connections
Water Source
Surface water
Drawn from surface water — SDWIS source code SW
Active Violations
0
6 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
LEAD AND COPPER RULE REVISIONS REPORTING FAILURE — — 2025 Resolved
Chlorite MONITORING AND REPORTING — 1.0 mg/L 2017 Resolved
Public Notice OTHER — — 2017 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2016 Resolved
Surface Water Treatment Rule MONITORING AND REPORTING — — 2016 Resolved
CARBON, TOTAL MONITORING AND REPORTING — TT 2015 Archived
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 0 were health-based. All have been resolved and none remain open.

About the Main Water System

Utility City Of San Juan
PWSID TX1080010
Water source Surface water — Drawn from surface water — SDWIS source code SW
Population served 20,272
Service connections 7,317
Systems serving this area 4
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is San Juan tap water safe to drink? ▼
No federal limit is exceeded on record. No violations are currently open.
Does San Juan water have PFAS? ▼
PFAS was detected but stayed below the federal limit.
Who supplies water to San Juan? ▼
City Of San Juan (PWSID TX1080010), 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 2025-10-30. No significant deficiencies were recorded.

What Should San Juan 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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