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City water profile

Tomball water quality

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

Median indexed hardness

187PPM

2 indexed ZIPs

Range 187–187 PPM

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

City summary

What the indexed records say

Tomball has 2 published ZIP profiles across Harris County. The indexed median is 187 PPM, compared with 111 PPM across Texas.

Among the 523 Texascities with an indexed median, Tomball ranks #226from highest to lowest. Across all 1,026 state ZIP profiles, available estimates run from 5.4to 500.5 PPM.

The 187–187 PPM range shows how much the available ZIP estimates vary within the city label.

Hardness distribution

How local ZIP estimates compare

Soft0 ZIPs
Moderately hard0 ZIPs
Hard0 ZIPs
Very hard2 ZIPs

2 of 2 ZIP profiles have a hardness estimate. Bars count ZIP profiles, not households or laboratory samples.

Evidence quality

Distance, dates, and confidence

Median nearest distance
3.4 miles
Profiles with evidence
2/2

Confidence labels

High: 0Moderate: 2Low: 0

Observation window: Aug 9, 2016 to Jun 12, 2025.

ZIP directory

Water reports in Tomball

Open a ZIP for site-level provenance and measurements.

ZIP code

77375

Very Hard

187 PPM

Nearest site
3.4 mi
Confidence
Moderate

View full ZIP evidence →

ZIP code

77377

Very Hard

187 PPM

Nearest site
3 mi
Confidence
Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

City Of Tomball

PWSID TX1010026

Groundwater
System population served
17,532
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.

No violation records are included in the current lookback window.

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 Tomball

Is the water hard?

The indexed city median is 187 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.