States ›Texas ›Frio County ›Dilley

Dilley, TX Tap Water Quality 2026

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

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

Main Utility: City Of Dilley PWSID: TX0820001 Updated: 2026 Q2
🚨

1 violation currently open

Lead is 0.50 ppb, 3% of the action level. No PFAS was detected.

C

Dilley earns a C for water quality

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

Lead: 0.50 ppb — 3% of the federal action level
PFAS tested, none detected
14 violations since 2015, 2 health-based
1 violation currently open
Dilley's lead level vs. all Texas community water systems
0 ppb5 ppb10 ppb15 ppb
Lead level: 0.50 ppb — 3% of the federal action level
✓ Lower lead than 98% of Texas utilities
Population Served
3270
~3691 connections
Water Source
Groundwater
Drawn from wells — SDWIS source code GW
Active Violations
1
1 open of 14 since 2015

Lead & Copper Testing

Lead (Pb)
90th percentile of tap samples collected across the distribution system
3% of EPA action level
0.50 ppb
Action level: 15 ppb
The 90th-percentile lead result is 0.50 ppb, 3% 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
Consumer Confidence Rule OTHER — — 2025 Resolved
Public Notice OTHER — — 2025 Resolved
Public Notice OTHER — — 2024 Resolved
LEAD AND COPPER RULE REVISIONS TREATMENT TECHNIQUE — — 2024 Unaddressed
LEAD AND COPPER RULE REVISIONS REPORTING FAILURE — — 2024 Unaddressed
Consumer Confidence Rule OTHER — — 2024 Resolved
Public Notice OTHER — — 2024 Resolved
Revised Total Coliform Rule TREATMENT TECHNIQUE — — 2024 Resolved
E. COLI MONITORING AND REPORTING — 0 2023 Resolved
Revised Total Coliform Rule MONITORING FAILURE — — 2021 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2018 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2017 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2017 Resolved
Lead and Copper Rule MONITORING AND REPORTING — TT 2017 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

1 violation remains open, out of 14 recorded since 2015 (2 health-based).

About the Main Water System

Utility City Of Dilley
PWSID TX0820001
Water source Groundwater — Drawn from wells — SDWIS source code GW
Population served 3,270
Service connections 3,691
Systems serving this area 1
Regulator State primacy agency
Data through 2026 Q2 — EPA SDWIS

Frequently Asked Questions

Is Dilley tap water safe to drink? ▼
No federal limit is exceeded on record. 1 violation(s) remain open. Lead is 0.50 ppb, 3% of the action level.
Does Dilley water have PFAS? ▼
It was tested for the six regulated PFAS compounds and none were detected.
Who supplies water to Dilley? ▼
City Of Dilley (PWSID TX0820001). Groundwater. Drawn from wells — SDWIS source code GW
When was this system last inspected? ▼
It was last inspected on 2024-08-07. No significant deficiencies were recorded.

What Should Dilley 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.

Nearby Cities in Texas

Pearsall, Tx Tap Water Quality 2026 Frio Moore, Tx Tap Water Quality 2026 Frio Bigfoot, Tx Tap Water Quality 2026 Frio Hilltop, Tx Tap Water Quality 2026 Frio North Pearsall, Tx Tap Water Quality 2026 Frio