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City water profile

South Houston water quality

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

Median indexed hardness

76PPM

One indexed ZIP

Range 76.2–76.2 PPM

State comparison
35 PPM below
State hardness rank
#429 of 523
Matched utilities
1
Active health records
0

City summary

What the indexed records say

South Houston has 1 published ZIP profile across Harris County. The indexed median is 76 PPM, compared with 111 PPM across Texas.

Among the 523 Texascities with an indexed median, South Houston ranks #429from 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 hard1 ZIP
Hard0 ZIPs
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
11.9 miles
Profiles with evidence
1/1

Confidence labels

High: 0Moderate: 1Low: 0

Observation window: Jan 14, 2016 to May 19, 2026.

ZIP directory

Water reports in South Houston

Open a ZIP for site-level provenance and measurements.

ZIP code

77587

Moderately Hard

76.2 PPM

Nearest site
11.9 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

City Of South Houston

PWSID TX1010294

Surface water
System population served
17,397
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
LEAD AND COPPER RULE REVISIONSTX1010294Jul 2, 2025Resolved

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 South Houston

Is the water hard?

The indexed city median is 76 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.