Water Softeners & Water Filtration in League City, TX

The City of League City runs its own water system. Most of its water is treated surface water purchased from two sources: the City of Houston, which treats Trinity River water at its Southeast Water Purification Plant, and the Gulf Coast Water Authority, which treats Brazos River water. A small share comes from city wells.

League City is in the part of the Harris-Galveston Subsidence District with the tightest limits on groundwater, so surface water carries most of the load. Here is what shows up in League City water, and what treatment does about each one.

A reverse osmosis drinking water system installed under the sink.

Explore Our Water Treatment Systems

The same systems we install throughout the Houston area. See specs, warranties, and package details.

Water Softeners

Whole-home softening to stop hard water damage to your pipes, fixtures, and appliances.

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Whole-Home Filtration

Filtration for city and private well water — iron, sediment, chlorine, and more.

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Drinking Water & RO

Reverse osmosis systems for clean, great-tasting drinking water at the tap.

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What Shows Up in League City Water

Hard water

The city's 2025 water quality report lists hardness of 124 ppm, about 7 grains per gallon. That is hard water. Calcium and magnesium leave scale on fixtures, spots on glassware, film in the shower, and stiffness in laundry, and scale is hard on water heaters, dishwashers, and tankless units. Hardness is what an ion exchange softener is built for.

Chloramine

The city disinfects with chloramine, which is chlorine combined with ammonia. Chloramine lasts longer in the pipes than chlorine, but it has its own taste and smell, and ordinary carbon filters do not remove it as well. Catalytic carbon and reverse osmosis are built for it.

Disinfection byproducts

Byproducts like trihalomethanes and haloacetic acids form when disinfectant reacts with natural organic material, which river water carries more of than well water. The city reports them within federal limits. Activated carbon filtration and reverse osmosis both reduce them.

Water that changes

With two river sources and city wells, the mix feeding your line can shift. When the mix changes, hardness, taste, and odor can change with it. A softener and carbon filtration keep your water consistent no matter which source is feeding your line.

Which Treatment Handles What

• Ion exchange softener — hardness, plus some minerals and radiological elements
• Activated carbon filtration — chlorine, taste and odor, and disinfection byproducts
• Reverse osmosis — the broadest reduction, including arsenic, chromium-6, radium, uranium, and nitrate
• Sediment filtration — particulate and turbidity

This is why our packages pair a whole-home system with a drinking water system. A softener handles the water that goes on you. Reverse osmosis handles the water that goes in you. Neither one does the other job.

Find Out What Is In Your Water Specifically

Most of League City is on the city system, but some neighborhoods in and around League City are served by other districts, and water quality also varies with your home's plumbing. Two ways to find out what yours is:

• Check your ZIP code below and read its full water report. Your utility name is on your water bill.
• Or let us test your water at your kitchen sink: hardness, chlorine, and total dissolved solids, with the results in front of you.

What We Install in League City

We install and service whole-home water softeners, whole-home filtration, and PureGuard reverse osmosis drinking water systems throughout the League City area. Our SENTINEL ELITE package combines all three plus leak detection. Salt delivery and filter changes are covered by the UnitedCare Membership.

Communities We Serve in League City

South Shore Harbour, Tuscan Lakes, Victory Lakes, Westover Park, Mar Bella, Magnolia Creek, Bay Colony, and the 77573 and 77546 ZIP codes.

Nearby Areas We Serve

Water changes from one provider to the next, so it is worth checking your own area. We also serve Dickinson, Friendswood, Pearland and Houston.

Already Have a System?

We service and repair water treatment equipment in League City, typically within 24 to 48 hours, including systems we did not install. See water softener repair, filtration repair, and reverse osmosis repair.

Get Your League City Water Tested

We will test at your sink and walk you through what the numbers mean, with no obligation.

Call United Water Softeners at 281-240-0261 or request a free in-home water test.

Public water systems serving the League City area are regulated by the Texas Commission on Environmental Quality and are required to meet federal drinking water standards. Water quality varies by provider and by address. United Water Softeners · TCEQ Licensed WTS III.