Marshall, TX water hardness

Tap water hardness
13mg/L
0.8gpg
Soft

Calculated from the utility's calcium and magnesium results · June 2022

TX typical
112 mg/L
EPA health violations since 2016
4
Data
Calculated from utility data

Marshall water measures 13 mg/L (0.8 gpg) of hardness, soft by USGS standards. TapWaterData worked it out from the calcium and magnesium levels the local utility reports (June 2022).

Marshall on the hardness scale, with nearby cities
060120180240300360+TX typical 112Whitehouse: 3 mg/LWhitehouse 3Atlanta: 5 mg/LAtlanta 5Henderson: 8 mg/LHenderson 8Gladewater: 9 mg/LGladewater 9Gilmer: 16 mg/LGilmer 16Kilgore: 18 mg/LKilgore 18Mount Pleasant: 23 mg/LMount Pleasant 23White Oak: 25 mg/LWhite Oak 25Longview: 41 mg/LLongview 41Carthage: 57 mg/LCarthage 57Marshall 13mg/L as calcium carbonate060120180240300360+TX 112Henderson: 8 mg/LHenderson 8Gladewater: 9 mg/LGladewater 9Kilgore: 18 mg/LKilgore 18White Oak: 25 mg/LWhite Oak 25Longview: 41 mg/LLongview 41Carthage: 57 mg/LCarthage 5713 mg/Lmg/L as calcium carbonate
Soft 0–60 mg/LModerately hard 61–120 mg/LHard 121–180 mg/LVery hard 181+ mg/L

At 13 mg/L, Marshall is 99 mg/L below the typical Texas figure of 112. Of the 10 nearest cities we track, 4 have softer water and 6 have harder. The range nearby runs from 3 mg/L in Whitehouse to 57 in Carthage.

What 13 mg/L means at home

Soap and shampoo lather with very little product. Kettles and showerheads stay mostly free of white crust.

Some people notice that soap feels slow to rinse off in soft water. That slippery feel is normal and harmless.

Hardness is not a health problem, and EPA sets no limit for it. It is a matter of scale and soap.

What to do about it

Nothing, as far as hardness goes. At 13 mg/L a softener would have almost nothing to remove.

Carbon filter

If the water tastes of chlorine, a pitcher or faucet carbon filter takes care of that. It does not change hardness.

EPA record for Marshall's water system

City of Marshall · PWSID TX1020002

4 health-based violations since 2016

Serves about 23,091 people from surface water.

Health-based
4
Monitoring or reporting
26
Open now
3

EPA lists this system as serving Marshall.

20162017201820192020202120222023202420252026Surface Water Treatment Rule'16'18'20'22'24'26Surface Water Treatment Rule
Each dot is one health-based violation, placed at the start of its compliance period.
Contaminant or ruleViolationsPeriodStatus
Surface Water Treatment Rulefiltration and disinfection42021–2025Resolved

Health-based means a contaminant above its legal limit or a missed treatment step. Monitoring and reporting violations are late or missing tests and notices. Source: EPA ECHO, 2026Q3 export, violations with periods starting 2016 or later. Full EPA record.

Questions

Is Marshall water hard?

No. It measures about 13 mg/L (0.8 grains per gallon), which the USGS classes as soft.

What is the water hardness in Marshall in grains per gallon?

About 0.8 gpg. One grain per gallon equals 17.1 mg/L, so 13 mg/L divided by 17.1 gives 0.8.

Has the Marshall water system had EPA violations?

EPA records show 4 health-based violations for City of Marshall since 2016, involving Surface Water Treatment Rule. There were also 26 monitoring or reporting violations, which are about late or missing tests and notices.

Nearby cities

All 342 cities in Texas

Hardness data: TapWaterData US Water Hardness (calculated from utility data, June 28, 2022), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.