MyTapWater.us

PWSID TX0820001

CITY OF DILLEY

Community water system based in Dilley, TX

Service area on file with EPA: Frio County. EPA's recorded service area can be incomplete for regional authorities. The cities and counties above are what the utility has filed with EPA; the utility may serve additional areas.

Population served
4,505
Source
Groundwater
Status
Active

At a glance

3 above the safety limit, 2 detections to watch

Past 5 years: 4 health-based violations on file, all marked Resolved or Archived. See compliance history below.

Risk classification follows EPA's published values for safe drinking water, with caution and concern bands reviewed by a clinician. Past resolved violations do not influence this card. See methodology.

Lead service line inventory

No inventory data on file

We do not yet have this utility's published Lead Service Line Inventory on file. The EPA Lead and Copper Rule Improvements (LCRI) required every community water system to publish one by October 16, 2024 and to identify and replace any lead lines within 10 years. How lead enters drinking water.

Phase 1 coverage focuses on the largest NC utilities. Smaller systems will be added; in the meantime, ask your utility for their inventory or check their Consumer Confidence Report.

Lead and copper test results

The most recent measurement per contaminant from EPA's Lead and Copper Rule sampling.

Why only lead and copper, and not arsenic, nitrate, or others?

EPA's bulk SDWIS download is the only nationwide per-system sample data they publish, and it only includes the Lead and Copper Rule table. Values for other regulated contaminants (TTHMs, nitrate, arsenic, etc.) appear on this page only when they trigger a violation. For the full per-system contaminant suite, see the utility's annual Consumer Confidence Report (link further down the page).

Most recent measurements per contaminant (Lead and Copper Rule) . Sorted by risk: concern first, then caution, then unrated, then safe.
Contaminant Most recent Date Risk
Lead
PB90
 0.0005 mg/L December 31, 2024 Detected (no safe level)

Data from EPA SDWIS (Lead and Copper Rule sample table) , last refreshed May 24, 2026.

PFAS and emerging contaminants

This system was tested 120 times under EPA's latest PFAS monitoring program; 1 of the 30 chemicals tested was detected.

What is this testing program?

EPA's fifth Unregulated Contaminant Monitoring Rule cycle (UCMR 5, 2023 to 2025) required every public water system serving over 3,300 people to test for 29 per- and polyfluoroalkyl substances (PFAS) plus lithium; 30 chemicals in total. Most recent detection per chemical shown below.

Most recent UCMR 5 detection per contaminant . Sorted by risk: concern first, then caution, then unrated, then safe.
Contaminant Most recent detection Date Risk
lithium
0.0304 mg/LJuly 11, 2023 Caution
Tested but not detected (29 contaminants)

EPA tested for these substances and every sample was below the minimum reporting level. Absence of detection does not mean true zero; it means below the laboratory's quantitation threshold.

Data from EPA UCMR 5 (Unregulated Contaminant Monitoring Rule) , last refreshed May 24, 2026.

Fluoride

Per CDC My Water's Fluoride

CITY OF DILLEY does not add fluoride to its drinking water.

This system has not reported adding fluoride to its water on CDC's My Water's Fluoride listing. Natural fluoride may still be present at trace levels from the source water; the utility's annual water quality report has the latest measured concentration.

Source: CDC My Water's Fluoride, listed under DILLEY (Frio County). Verify on CDC's site .

Area context

Frio County, TX (2020 data)

Community water systems
0 of 5 add fluoride
Population on fluoridated water
0 of 18,124 (0.0%)

Texas statewide (2020 data)

Population on fluoridated water
19,743,163 of 27,818,869 (71.0%)
Community water systems adding fluoride
2,573 of 6,046

Data from CDC My Water's Fluoride (per-system status) , last refreshed May 19, 2026.

Data from CDC Water Fluoridation Reporting System (state and county aggregates) , last refreshed May 16, 2026.

Compliance history

EPA-recorded violations against this system over the last 5 years.

How to read this section

Health-based violations are when a measured limit was exceeded; the measured concentration is shown alongside the EPA federal limit where SDWIS published it. Monitoring and reporting items are paperwork issues (missed sample dates, late filings) that do not themselves indicate unsafe water.

3 active health-based violations

EPA records 3 health-based violations that have not yet been resolved. An additional 4 health-based violations in the last 5 years are already resolved.

Health-based violations in the last 5 years
Period start Contaminant What happened Measured level Status
October 17, 2024 Lead and Copper Rule Revisions LSL Inventory Not reported Unaddressed
October 17, 2024 Lead and Copper Rule Revisions LSL Inventory Not reported Unaddressed
October 17, 2024 Lead and Copper Rule Revisions LSL Inventory Not reported Unaddressed
February 24, 2024 Revised Total Coliform Rule Treatment Technique, Level 1 Assessment (RTCR) Not reported Resolved
February 24, 2024 Revised Total Coliform Rule Treatment Technique, Level 1 Assessment (RTCR) Not reported Resolved
February 24, 2024 Revised Total Coliform Rule Treatment Technique, Level 1 Assessment (RTCR) Not reported Resolved
February 24, 2024 Revised Total Coliform Rule Treatment Technique, Level 1 Assessment (RTCR) Not reported Resolved
19 monitoring and reporting item s (paperwork) , 5 still open · these are not health risks
Monitoring and reporting items in the last 5 years
Period start Relates to Item Status
July 1, 2025 Consumer Confidence Rule Consumer Confidence Report Complete Failure to Report Unaddressed
May 1, 2025 Public Notice Public Notification Violation for NPDWR Violation Resolved
May 1, 2025 Public Notice Public Notification Violation for NPDWR Violation Resolved
October 28, 2024 Public Notice Public Notification Violation for NPDWR Violation Resolved
October 28, 2024 Public Notice Public Notification Violation for NPDWR Violation Resolved
October 17, 2024 Lead and Copper Rule Revisions LSL Reporting Unaddressed
October 17, 2024 Lead and Copper Rule Revisions LSL Reporting Unaddressed
October 17, 2024 Lead and Copper Rule Revisions LSL Reporting Unaddressed
July 2, 2024 Consumer Confidence Rule Consumer Confidence Report Inadequate Reporting Unaddressed
April 14, 2024 Public Notice Public Notification Violation for NPDWR Violation Resolved
April 14, 2024 Public Notice Public Notification Violation for NPDWR Violation Resolved
August 24, 2023 E. Coli Monitoring, Source Water (GWR) Resolved
August 24, 2023 E. Coli Monitoring, Source Water (GWR) Resolved
August 24, 2023 E. Coli Monitoring, Source Water (GWR) Resolved
August 24, 2023 E. Coli Monitoring, Source Water (GWR) Resolved
August 1, 2021 Revised Total Coliform Rule Monitoring, Routine (RTCR) Resolved
August 1, 2021 Revised Total Coliform Rule Monitoring, Routine (RTCR) Resolved
August 1, 2021 Revised Total Coliform Rule Monitoring, Routine (RTCR) Resolved
August 1, 2021 Revised Total Coliform Rule Monitoring, Routine (RTCR) Resolved
14 older violation s (5-10 years ago) · all paperwork (monitoring/reporting), none health-based , all resolved
Violations 5-10 years ago (14 total)
Period start Relates to Item Measured level Status
April 1, 2018 Lead and Copper Rule Lead Consumer Notice — Resolved
April 1, 2018 Lead and Copper Rule Lead Consumer Notice — Resolved
July 1, 2017 Lead and Copper Rule Water Quality Parameter M/R — Resolved
July 1, 2017 Lead and Copper Rule Water Quality Parameter M/R — Resolved
July 1, 2017 Lead and Copper Rule Water Quality Parameter M/R — Resolved
July 1, 2017 Lead and Copper Rule Water Quality Parameter M/R — Resolved
July 1, 2017 Lead and Copper Rule Water Quality Parameter M/R — Resolved
July 1, 2017 Lead and Copper Rule Water Quality Parameter M/R — Resolved
July 1, 2017 Lead and Copper Rule Water Quality Parameter M/R — Resolved
July 1, 2017 Lead and Copper Rule Water Quality Parameter M/R — Resolved
July 1, 2017 Lead and Copper Rule Water Quality Parameter M/R — Resolved
July 1, 2017 Lead and Copper Rule Water Quality Parameter M/R — Resolved
July 1, 2017 Lead and Copper Rule Water Quality Parameter M/R — Resolved
July 1, 2017 Lead and Copper Rule Water Quality Parameter M/R — Resolved

Data from EPA SDWIS (violation records) , last refreshed May 24, 2026.

Where to see every contaminant this utility tested for

EPA's bulk SDWIS dataset gives MyTapWater.us per-system measured values for lead and copper, plus violation records for everything else. To see every regulated contaminant this utility tested for in the past year (TTHMs, HAA5, nitrate, arsenic, fluoride, chromium, etc.) with measured values, read the utility's Consumer Confidence Report (CCR).

Every community water system is required by EPA to publish a CCR annually, by July 1, listing every contaminant they sampled, the measured value, the federal limit, and any health-based exceedances. Most utilities post the report online; some mail it with your bill.

How to find CITY OF DILLEY's CCR:

Other water systems in Frio County, TX

Compare nearby utilities by population served.

Contact this utility

Public administrative contact information for this water system, as filed with the EPA. Use this to ask about your service line, request your home's lead status, or report a water quality issue.

Administrator
INOCENCIO, ALEXANDRIA
Phone
830-965-1624
Email
alexandria.inocencio@cityofdilleytx.com
Mailing address
PO BOX 230
DILLEY, TX 78017-0230

Where this page's data comes from

Bundle released 2026-Q2, regenerated May 24, 2026. Each section above also shows its own source date so you can tell at a glance how fresh that part of the page is.

Every value on this page is cross-verified before publication; read our methodology for the verification steps and corrections process.