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City water profile

Plains water quality

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

Median indexed hardness

385PPM

One indexed ZIP

Range 385–385 PPM

State comparison
274 PPM above
State hardness rank
#16 of 523
Matched utilities
1
Active health records
1

City summary

What the indexed records say

Plains has 1 published ZIP profile across Yoakum County. The indexed median is 385 PPM, compared with 111 PPM across Texas.

Among the 523 Texascities with an indexed median, Plains ranks #16from 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
3.1 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 1Low: 0

Observation window: May 23, 2016 to Sep 4, 2024.

ZIP directory

Water reports in Plains

Open a ZIP for site-level provenance and measurements.

ZIP code

79355

Very Hard

385 PPM

Nearest site
3.1 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

City Of Plains

PWSID TX2510002

Groundwater
System population served
1,355
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
ArsenicTX2510002Apr 1, 2026Addressed · health-based
ArsenicTX2510002Jan 1, 2026Archived · health-based
ArsenicTX2510002Oct 1, 2025Archived · health-based
ArsenicTX2510002Jul 1, 2025Archived · health-based
ArsenicTX2510002Apr 1, 2025Archived · health-based
ArsenicTX2510002Jan 1, 2025Archived · health-based
ArsenicTX2510002Oct 1, 2024Archived · health-based
ArsenicTX2510002Jul 1, 2024Archived · health-based
ArsenicTX2510002Apr 1, 2024Archived · health-based
ArsenicTX2510002Jan 1, 2024Archived · health-based

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 Plains

Is the water hard?

The indexed city median is 385 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.