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City water profile

Marshall water quality

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

Median indexed hardness

47PPM

2 indexed ZIPs

Range 46.9–48 PPM

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

City summary

What the indexed records say

Marshall has 2 published ZIP profiles across Harrison County. The indexed median is 47 PPM, compared with 111 PPM across Texas.

Among the 523 Texascities with an indexed median, Marshall ranks #475from highest to lowest. Across all 1,026 state ZIP profiles, available estimates run from 5.4to 500.5 PPM.

The 46.9–48 PPM range shows how much the available ZIP estimates vary within the city label. At least one estimate is marked low confidence, so observation distance and date deserve extra attention.

Hardness distribution

How local ZIP estimates compare

Soft2 ZIPs
Moderately hard0 ZIPs
Hard0 ZIPs
Very hard0 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
25.5 miles
Profiles with evidence
2/2

Confidence labels

High: 0Moderate: 1Low: 1

Observation window: Mar 21, 2016 to Jun 3, 2026.

ZIP directory

Water reports in Marshall

Open a ZIP for site-level provenance and measurements.

ZIP code

75670

Soft

48 PPM

Nearest site
19.2 mi
Confidence
Moderate

View full ZIP evidence →

ZIP code

75672

Soft

46.9 PPM

Nearest site
25.5 mi
Confidence
Low

View full ZIP evidence →

Public water systems

Utilities associated with this city

City Of Marshall

PWSID TX1020002

Surface water
System population served
23,091
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 RuleTX1020002Oct 1, 2025Unaddressed
LEAD AND COPPER RULE REVISIONSTX1020002Jul 2, 2025Unaddressed
Revised Total Coliform RuleTX1020002Jul 1, 2025Resolved
Consumer Confidence RuleTX1020002Jul 1, 2025Unaddressed
Interim Enhanced Surface Water Treatment RuleTX1020002Jun 1, 2025Resolved
Interim Enhanced Surface Water Treatment RuleTX1020002Jun 1, 2025Resolved · health-based
Revised Total Coliform RuleTX1020002Jan 1, 2025Resolved
Interim Enhanced Surface Water Treatment RuleTX1020002Dec 1, 2024Resolved
Revised Total Coliform RuleTX1020002Oct 1, 2024Resolved
Revised Total Coliform RuleTX1020002Mar 1, 2024Resolved

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 Marshall

Is the water hard?

The indexed city median is 47 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.