Water hardness in League City
7.2 gpg hard
Tap water in League City is hard: 7.2 gpg (124 mg/L · 6.9 °dH · 12.4 °fH).
Source: City of League City Consumer Confidence Report (2026 edition, representing 2025) (2025) · data checked 2026-10-23
League City buys treated water from the City of Houston's Southeast Water Purification Plant, which takes its raw water from the Trinity River through the Gulf Coast Water Authority. River water from the Gulf Coast plain is moderately hard, here 124 mg/L CaCO₃. Some scale builds up in heaters; a softener is optional.
USGS classes: soft 0–60, moderately hard 61–120, hard 121–180, very hard >180 mg/L.
Water data
| Total hardness | 7.2 gpg |
|---|---|
| Utility | City of League City (purchases from City of Houston SEWPP and Gulf Coast Water Authority) |
How League City compares
- Tap water in League City is 20 % softer than the median of the 1372 cities we track in the United States (9.1 gpg).
- By hardness it ranks 869 of 1372 in the United States (1 = hardest); 36 % of these cities have softer water.
- In Texas it is number 43 of 60 cities; the regional median is 8.6 gpg.
Ranking of the hardest and softest water in the United States →
What it means at home
- Fast scale on taps, shower screens and kettle; white spots on glassware.
- Water heater: efficiency loss and element failures within years if unprotected.
- Dry skin and dull hair after showering are common.
- Softener recommended; jug or reverse osmosis for drinking.
How much salt will you use for softening?
Recommended, especially with a heater or boiler: scale cuts efficiency and shortens its life.
Descale a coffee machine or kettle about every 2 months (typical manufacturer guidance for this hardness).
Estimates for planning, not a quote. Check your appliance manual for exact settings.
Dishwasher setting in League City
| Brand | Setting for this water |
|---|---|
| Bosch | H01 |
| Miele | 7 °dH |
| AEG / Electrolux | 2 |
| Beko | 2nd |
| Hoover | S1 |
| LG | H2 |
From each brand's manual for the model family named in the source; your model may differ, so check its manual. All brands and how to change the setting →
FAQ
Is League City water hard or soft?
It is hard: 124 mg/L as CaCO₃ (7.2 gpg, 6.9 °dH). The usual bands are soft < 60, moderately hard 60–120, hard 120–180 and very hard > 180 mg/L.
Is tap water in League City safe to drink?
Hardness is not a health issue; it is about limescale, taste and appliances. Mains water must meet national drinking-water standards. USGS classes: soft 0–60, moderately hard 61–120, hard 121–180, very hard >180 mg/L.
How many grains per gallon is League City water?
7.2 gpg, equal to 6.9 °dH, 12.4 °fH or 124 mg/L calcium carbonate.
What dishwasher salt setting should I use in League City?
For 124 mg/L (6.9 °dH) check your manufacturer's table: level 4–5.
Do I need a water softener in League City?
Recommended if you have a water heater, boiler or tankless unit: it saves repairs and detergent.
Source
Source: City of League City Consumer Confidence Report (2026 edition, representing 2025) (2025). Method: figure published by the water supplier. City of League City Consumer Confidence Report (2026 edition, representing 2025) · Outdated figure? Tell us