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City water profile

Dilley water quality

Compare local ZIP estimates, evidence quality, associated public systems, and compliance history for Dilley, Texas.

Median indexed hardness

252PPM

One indexed ZIP

Range 252–252 PPM

State comparison
141 PPM above
State hardness rank
#112 of 523
Matched utilities
1
Active health records
1

City summary

What the indexed records say

Dilley has 1 published ZIP profile across Frio County. The indexed median is 252 PPM, compared with 111 PPM across Texas.

Among the 523 Texascities with an indexed median, Dilley ranks #112from highest to lowest. Across all 1,026 state ZIP profiles, available estimates run from 5.4to 500.5 PPM.

Because only one ZIP is represented, the city median and range are the same local estimate. It should not be read as multiple independent samples across the community.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs
Moderately hard0 ZIPs
Hard0 ZIPs
Very hard1 ZIP

1 of 1 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
13.2 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 1Low: 0

Observation window: Jan 11, 2016 to Jun 2, 2026.

ZIP directory

Water reports in Dilley

Open a ZIP for site-level provenance and measurements.

ZIP code

78017

Very Hard

252 PPM

Nearest site
13.2 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

City Of Dilley

PWSID TX0820001

Groundwater
System population served
4,505
Last reported
Jun 26, 2026

A municipal system, in-state city, and served county all agree with this Census ZCTA.

Compliance history

What EPA records show

1 unique active health-based record appears among associated systems. This does not mean every contaminant was tested at every tap.

RecordSystemPeriodStatus
Consumer Confidence RuleTX0820001Jul 1, 2025Resolved
Public NoticeTX0820001May 1, 2025Resolved
Public NoticeTX0820001Oct 28, 2024Resolved
LEAD AND COPPER RULE REVISIONSTX0820001Oct 17, 2024Unaddressed · health-based
LEAD AND COPPER RULE REVISIONSTX0820001Oct 17, 2024Unaddressed
Consumer Confidence RuleTX0820001Jul 2, 2024Resolved
Public NoticeTX0820001Apr 14, 2024Resolved
Revised Total Coliform RuleTX0820001Feb 24, 2024Resolved · health-based
E. COLITX0820001Aug 24, 2023Resolved
Revised Total Coliform RuleTX0820001Aug 1, 2021Resolved

Practical next steps

Move from index to evidence

  1. 1. Open your ZIP. Check distance, dates, confidence, and the associated utility.
  2. 2. Read the current CCR. Confirm source water, detections, limits, ranges, and notices.
  3. 3. Test the tap when needed. Confirm health concerns or treatment sizing with the right method.

Questions people ask

About water in Dilley

Is the water hard?

The indexed city median is 252 PPM. Open the ZIP report to verify the distance and confidence behind that estimate.

Is the tap water safe?

Compliance history is utility-wide and cannot guarantee conditions at every tap. Check current notices and test when address-specific evidence is needed.

Do I need treatment?

Choose treatment only after confirming the problem at the property. A softener targets hardness; contaminant treatment requires a matching, verified performance claim.