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City water profile

Post water quality

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

Median indexed hardness

144PPM

One indexed ZIP

Range 144–144 PPM

State comparison
33 PPM above
State hardness rank
#271 of 523
Matched utilities
1
Active health records
0

City summary

What the indexed records say

Post has 1 published ZIP profile across Garza County. The indexed median is 144 PPM, compared with 111 PPM across Texas.

Among the 523 Texascities with an indexed median, Post ranks #271from 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
Hard1 ZIP
Very hard0 ZIPs

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
18.9 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 1Low: 0

Observation window: Jan 7, 2016 to Oct 13, 2020.

ZIP directory

Water reports in Post

Open a ZIP for site-level provenance and measurements.

ZIP code

79356

Hard

144 PPM

Nearest site
18.9 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

City Of Post

PWSID TX0850001

Surface water
System population served
5,471
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

No active health-based violation appears among the associated systems in the represented EPA reporting quarter. This does not mean every contaminant was tested at every tap.

RecordSystemPeriodStatus
Public NoticeTX0850001Apr 28, 2024Resolved
TTHMTX0850001Apr 1, 2024Resolved · health-based
TTHMTX0850001Jan 1, 2024Resolved · health-based
Public NoticeTX0850001Dec 31, 2023Resolved
Revised Total Coliform RuleTX0850001Mar 1, 2023Resolved
Public NoticeTX0850001Oct 15, 2022Resolved
Lead and Copper RuleTX0850001Oct 1, 2022Resolved
Public NoticeTX0850001Oct 1, 2022Resolved
Lead and Copper RuleTX0850001Dec 30, 2021Resolved
Lead and Copper RuleTX0850001Oct 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 Post

Is the water hard?

The indexed city median is 144 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.