How hard is the water in League City, TX?

Tap water hardness
114mg/L
6.7gpg
Moderately hard

Reported by City of League City · August 2025

TX typical
112 mg/L
EPA health violations since 2016
0
Softener for 3 people
24k grain
Data
Utility report

The water in League City carries roughly 114 mg/L of dissolved calcium and magnesium, or 6.7 grains per gallon. That is moderately hard water. The number comes from City of League City, dated August 2025.

League City on the hardness scale, with nearby cities
060120180240300360+TX typical 112Webster: 42 mg/LWebster 42La Porte: 51 mg/LLa Porte 51Seabrook: 61 mg/LSeabrook 61Nassau Bay: 67 mg/LNassau Bay 67Pasadena: 68 mg/LPasadena 68Friendswood: 69 mg/LFriendswood 69Bacliff: 94 mg/LBacliff 94Santa Fe: 100 mg/LSanta Fe 100Dickinson: 171 mg/LDickinson 171La Marque: 202 mg/LLa Marque 202League City 114mg/L as calcium carbonate060120180240300360+TX 112Webster: 42 mg/LWebster 42Nassau Bay: 67 mg/LNassau Bay 67Friendswood: 69 mg/LFriendswood 69Bacliff: 94 mg/LBacliff 94Santa Fe: 100 mg/LSanta Fe 100Dickinson: 171 mg/LDickinson 171114 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 114 mg/L, League City is close to the typical Texas figure of 112 mg/L. Of the 10 nearest cities we track, 8 have softer water and 2 have harder. The range nearby runs from 42 mg/L in Webster to 202 in La Marque.

What 114 mg/L means at home

You may see faint white spots on glasses and shower doors after the water dries.

Scale builds up slowly. A kettle or coffee maker needs descaling now and then, maybe every few months.

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

Optional. Plenty of households at this level live with it and descale the kettle now and then.

Water softener

Worth a look if spots on glass bother you, or if your tankless water heater manual asks for softer water.

Carbon filter

Improves taste and removes chlorine. It leaves calcium and magnesium in place.

Softener size for League City

3 people × 75 gallons a day × 6.7 gpg = 1,501 grains a day. A 24,000-grain unit regenerates about every 15 days.

Size it for your household

EPA record for League City's water system

City of League City · PWSID TX0840007

No health-based violations since 2016

Serves about 149,557 people from surface water.

Health-based
0
Monitoring or reporting
4
Open now
0

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 League City water hard?

Somewhat. It measures about 114 mg/L (6.7 grains per gallon), which the USGS classes as moderately hard.

What is the water hardness in League City in grains per gallon?

About 6.7 gpg. One grain per gallon equals 17.1 mg/L, so 114 mg/L divided by 17.1 gives 6.7.

What size water softener do I need in League City?

For 3 people using 75 gallons each per day, 6.7 gpg works out to about 1,501 grains a day. A 24,000-grain softener covers that with a regeneration about every 15 days.

Has the League City water system had EPA violations?

EPA records show no health-based violations for City of League City since 2016. There were also 4 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 (utility report, August 19, 2025), CC BY 4.0. Population: US Census Bureau. Violations: EPA ECHO. How we use them.