Is tap water safe in Mont Belvieu?

EPA SDWIS shows no active health-based violation in this profile's reporting window. That is not the same as proving every contaminant is absent, and federal data can lag state and utility records.

How hard is the water in Mont Belvieu, TX?

Nearby USGS observations produce an estimate of 187 ppm (10.9 grains per gallon), classified as very hard. This is not a tap measurement.

Do I need a water softener in ZIP code 77523?

At 187 ppm, a correctly sized whole-house softener can reduce scale buildup and hard-water spotting. Treatment for hardness does not remove all health-related contaminants.

City water profile

Mont Belvieu water quality

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

Median indexed hardness

187PPM

2 indexed ZIPs

Range 187–187 PPM

State comparison: 76 PPM above
State hardness rank: #228 of 523
Matched utilities: 1
Active health records: 0

City summary

What the indexed records say

Mont Belvieu has 2 published ZIP profiles across Chambers County. The indexed median is 187 PPM, compared with 111 PPM across Texas.

Among the 523 Texascities with an indexed median, Mont Belvieu ranks #228from 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: 13.9 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 Mont Belvieu

Open a ZIP for site-level provenance and measurements.

ZIP code

77523

Very Hard

187 PPM

Nearest site: 13.9 mi
Confidence: Moderate

View full ZIP evidence →

ZIP code

77580

Very Hard

187 PPM

Nearest site: 7.7 mi
Confidence: Moderate

View full ZIP evidence →

Public water systems

Utilities associated with this city

City Of Mont Belvieu

PWSID TX0360017

Groundwater

System population served: 12,864
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.

Record	System	Period	Status
TTHM	TX0360017	Jan 1, 2026	Resolved · health-based
TTHM	TX0360017	Oct 1, 2025	Resolved · health-based
TTHM	TX0360017	Oct 1, 2024	Resolved · health-based
TTHM	TX0360017	Oct 1, 2022	Resolved · health-based
TTHM	TX0360017	Apr 1, 2022	Resolved · health-based

Practical next steps

Move from index to evidence

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

Continue comparing

Other Texas communities

Anahuac

Chambers County

84 PPM median

Cleveland

Liberty County

187 PPM median

Montgomery

Montgomery County

187 PPM median

Splendora

Montgomery County

187 PPM median

Tomball

Harris County

187 PPM median

Prairie View

Waller County

187 PPM median

Search all 529 Texas cities →

Questions people ask

About water in Mont Belvieu

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.