Hard water in La Marque, TX
Reported by City of Texas City · March 2025
- TX typical
- 112 mg/L
- EPA health violations since 2016
- 0
- Softener for 3 people
- 24k grain
- Data
- Utility report
La Marque water measures 202 mg/L (11.8 gpg) of hardness, very hard by USGS standards. The number comes from City of Texas City, dated March 2025.
At 202 mg/L, La Marque is 90 mg/L above the typical Texas figure of 112. None of the 10 nearest cities we track has harder water. The range nearby runs from 42 mg/L in Webster to 200 in Texas City.
What 202 mg/L means at home
Scale forms fast here. Kettles and coffee makers need regular descaling, and showerheads clog unless you clean them.
Tank water heaters collect mineral sediment that insulates the water from the burner, so flushing the tank matters more than usual.
Dishes and glass shower doors spot easily. Soap scum and a dull film on hair or laundry are common complaints.
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
At 202 mg/L most of the trouble is scale, and only a few things deal with it.
Ion-exchange water softener
The standard whole-house fix. It swaps calcium and magnesium for sodium or potassium and needs salt plus a drain. Size it with the calculator below.
Salt-free conditioner
No salt and no drain line. It changes how minerals form scale instead of removing them, so water still tests hard.
Reverse osmosis or carbon filter
Under-sink reverse osmosis removes minerals from drinking water only. Plain carbon filters improve taste but do not soften.
3 people × 75 gallons a day × 11.8 gpg = 2,657 grains a day. A 24,000-grain unit regenerates about every 9 days.
EPA record for La Marque's water system
No health-based violations since 2016
Serves about 15,154 people from surface water.
- Health-based
- 0
- Monitoring or reporting
- 6
- Open now
- 4
EPA lists City of La Marque as the system serving La Marque. The hardness figure above comes from a different system's report, which TapWaterData uses for La Marque.
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 La Marque water hard?
Yes. It measures about 202 mg/L (11.8 grains per gallon), which the USGS classes as very hard.
What is the water hardness in La Marque in grains per gallon?
About 11.8 gpg. One grain per gallon equals 17.1 mg/L, so 202 mg/L divided by 17.1 gives 11.8.
What size water softener do I need in La Marque?
For 3 people using 75 gallons each per day, 11.8 gpg works out to about 2,657 grains a day. A 24,000-grain softener covers that with a regeneration about every 9 days.
Has the La Marque water system had EPA violations?
EPA records show no health-based violations for City of La Marque since 2016. There were also 6 monitoring or reporting violations, which are about late or missing tests and notices.
Nearby cities
- Hitchcock145 mg/LHard
- Santa Fe100 mg/LModerately hard
- Dickinson171 mg/LHard
- Texas City200 mg/LVery hard
- Bacliff94 mg/LModerately hard
- League City114 mg/LModerately hard
- Galveston164 mg/LHard
- Nassau Bay67 mg/LModerately hard
- Webster42 mg/LSoft
- Seabrook61 mg/LModerately hard
Hardness data: TapWaterData US Water Hardness (utility report, March 4, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.