Serving the Texas Hill Country & San Antonio since 1989
WQA-Certified  ·  Texas Class 3 Licensed  ·  Open 24/7
Family-owned since 1989 · San Antonio & the Texas Hill Country

Whole house water treatment systems for San Antonio & the Hill Country

Hill Country water is hard, and a softener alone rarely fixes all of it. We supply and install complete whole house water treatment: softening, filtration and drinking water in one system, sized from a free test of your water. Every install is done by our own TCEQ-licensed, WQA-certified technicians, with a firm written price before any work starts.

Typical hardness: Bexar & the Hill Country

15–25grains per gallon
SOFTMODERATEHARDVERY HARD ▸ YOU ARE HERE

Limestone aquifers put it there. A private well usually adds iron, sulfur and sediment on top. Twenty minutes on site tells you your exact number, free.

Since 1989
Family-owned and locally operated
4.9 ★
48 Google reviews
WQA & TCEQ
Certified and licensed technicians
Free
In-home water test and firm quote
The water out here

Fifteen to twenty-plus grains per gallon & that’s before you add a well.

Hill Country groundwater runs through limestone, so it arrives loaded with calcium and magnesium. Private wells add iron, sulfur, sediment and bacteria on top. The fix depends entirely on what is actually in your water which is why we test first.

Hard city water

Scale on fixtures and glassware, spotty dishes, a water heater working harder than it should, stiff laundry and dry skin. A properly sized softener stops it at the source.

Private well water

Iron and manganese staining, rotten-egg sulfur odor, sediment that clogs fixtures, and hardness well above city levels. Most softener companies won’t touch a well. We have since 1989.

Taste, chlorine and odor

Chlorine, chloramine and off-tastes at the tap that a softener alone will not remove. Carbon filtration and reverse osmosis handle what softening cannot.

Not sure which one you have? We test it for free and design one whole house system that handles all of it.

What we do

Whole house water treatment systems we install

One company for the whole job: we test your water, design the system, supply the equipment and install it properly. Each whole house water treatment system is built from the stages your water actually needs.

Water softeners installed and serviced in San Antonio and the Texas Hill Country

The core of most whole house water treatment systems: right-sized ion-exchange softeners that stop scale before it reaches your plumbing, water heater and appliances.

Whole-house water filtration tanks and filter housings on a home water line

Carbon and sediment filtration for chlorine, taste, odor and grit, so every tap in the house runs clean, not just the kitchen.

Under-sink reverse osmosis drinking water system

Under-sink RO for genuinely clean drinking and cooking water, with the dissolved solids a softener cannot remove.

Well water treatment tanks and pressure vessels

Iron and manganese removal, sulfur odor filtration, sediment, UV purification and pH correction, built around your well.

Water filter housings and cartridges used in whole-house treatment systems

Free on-site testing for hardness, iron, pH and more, so the system you buy matches the water you actually have.

Commercial water treatment equipment installed for a San Antonio business

Restaurants, salons, car washes and manufacturing, with treatment sized to your capacity and your process.

Whole-home water treatment systems installed in a Texas Hill Country property
Well water specialists

Most softener companies won’t touch a well.
We have since 1989.

A well is not a smaller version of city water. Iron stains, sulfur smells, sediment wears out valves and bacteria is a health issue, all on top of hardness that is usually worse than what the city delivers. Treating one properly means testing it, then stacking the right stages in the right order.

Why Gaines

Why Hill Country homeowners choose Gaines

We are not a franchise and we are not a call center. The person who tests your water works for the family company that designs, supplies and installs your system.

Locally owned since 1989

Deep roots in San Antonio and the Hill Country, and customers who have been with us for decades.

WQA-certified, TCEQ licensed

Every whole house water treatment installation is done by our own TCEQ-licensed, WQA-certified water treatment specialists.

One system, one written price

Equipment and professional installation quoted together in writing, so you know the full cost before work starts.

Support after the install

Salt, filter changes and help whenever your system needs it, from the same team that installed it.

Sized to your water

Grain capacity and filter stages chosen from your test results and household use, not from a catalog page.

Free test and written quote

In-home water testing and a written quote cost nothing, with no obligation attached.

How it works

How your whole house water treatment system gets installed

Nobody should buy a water system from a brochure. Here is what actually happens.

Step one

Free on-site water test

We come to you and test what is coming out of your tap or your well: hardness, iron, pH, odor and sediment. It takes about twenty minutes and it costs nothing.

Step two

A system sized to the result

You get a written recommendation and a firm price for the whole house water treatment system your numbers call for. If a smaller system does the job, we say so.

Step three

Installed by a licensed technician

Professional installation of your whole house water treatment system by a licensed technician, then salt, filters and support for as long as you own it.

Where we work

San Antonio and across the Texas Hill Country

We install whole house water treatment systems throughout Bexar, Comal, Kendall, Kerr, Gillespie, Bandera and Blanco counties.

KerrGillespieBlancoBanderaKendallComalBexarKerrvilleFredericksburgBoerneBanderaCanyon LakeNew BraunfelsSan Antonio
Installing and servicing across seven Hill Country counties, and out to Wimberley, Dripping Springs, Marble Falls and Seguin.

Also serving

And out to

From the blog

Straight answers about Hill Country water

Common questions

Whole house water treatment: questions before you buy

Most of the region runs between 15 and 20+ grains per gallon, which is classed as very hard. Limestone aquifers dissolve calcium and magnesium straight into the groundwater. City supplies in San Antonio are hard too, but private wells are usually harder still and carry iron and sulfur on top.

A whole house water treatment system is one system, installed where water enters your home, that treats every tap, shower and appliance. Depending on your test results it combines sediment filtration, a water softener, carbon filtration for chlorine and taste, and on wells, iron or sulfur removal and UV. Reverse osmosis is usually added at the kitchen sink for drinking water.

A technician comes to your home or business and tests the water at the tap: hardness, iron, pH, odor and sediment, plus a look at your existing plumbing and equipment. It takes about twenty minutes. You get the numbers and a written recommendation, with no charge and no obligation.

On its own, usually not. A softener removes hardness, but it will not handle iron staining, sulfur odor, sediment or bacteria. Wells normally need a treatment train (pre-filtration, iron or sulfur removal, sometimes UV and pH correction) with softening as one stage. That is why we test before quoting.

We supply the equipment and install it, as one job with one written price. That way the system is sized to your water and one company stands behind it, from the first test to the finished install.

It depends on your water and your household size, which is why we test before we quote. After the free test you get a firm written price for the complete whole house water treatment system, installed, and an honest answer if a smaller system will do. Call (210) 635-7418 to book the test.

Whole house water treatment in San Antonio and the Hill Country, in short

Gaines Soft Water is a family-owned company that has supplied and installed whole house water treatment systems in San Antonio and the Texas Hill Country since 1989. Hill Country water commonly runs 15 to 25 grains per gallon, so most systems start with a water softener and add the filtration the free water test calls for. Call (210) 635-7418 to book it.

What it is

A whole house water treatment system treats water once, where it enters the home, so every tap, shower and appliance gets the same clean, soft water.

How softening works

Water softeners work by ion exchange, swapping calcium and magnesium for sodium before the water reaches your heater, fixtures and appliances. It is the only method that genuinely removes hardness.

City water is still hard

Municipal treatment makes water safe rather than soft. Whether you are on San Antonio city supply or a Hill Country town system, hardness passes through to your tap and has to be handled in the house.

Wells are a different job

Outside the towns, a great many properties are on private wells. Those are unregulated and untested unless the owner arranges it, and they often need iron or sulfur removal before any softener.

The right sequence

Order of treatment matters. Sediment first, then iron and sulfur, then softening, then disinfection if bacteria are present. A whole house water treatment system built in the wrong order fails early and expensively.

Sized from your numbers

Sizing is arithmetic rather than opinion. Household size times daily use times grains per gallon gives the load, and the softener stage is sized to regenerate every three to five days at that figure.

Testing is free

We test on site for free, anywhere in our service area, and put the results and a firm price for the complete whole house water treatment system in writing. A fair share of visits end with us recommending something smaller.

Supplied and installed together

We supply the equipment and install it as one job, so one company is responsible for your system from the first test to the last fitting.

One family since 1989

We have done this since 1989 as a family business, with WQA-certified and TCEQ-licensed technicians, across San Antonio and the Texas Hill Country.

Not every household is the same

Not every household needs the same equipment. Some need a water softener alone, some need filtration alongside it, and some need a full well train. The test is what separates those cases.

Salt-free is not softening

Salt-free conditioners reduce scale but do not remove hardness, so a test afterwards still reads high. Both have a place and we fit both.

What you noticeLikely causeWhat fixes it
Scale, spotting, poor latherHardnessCorrectly sized water softeners
Pool smell or flat tasteChlorineWhole-house carbon filtration
Orange stainingIron in well waterIron filter ahead of the softener
Rotten egg smellHydrogen sulfideAeration or catalytic carbon
Cloudy after rainSediment from the wellSediment pre-filtration
Flat drinking waterDissolved solidsReverse osmosis at the tap

Check any of this against the primary sources:

Free water test. Firm written quote. Call (210) 635-7418.

Tell us what your water is doing and we will design a whole house water treatment system to fix it, anywhere from San Antonio to Fredericksburg.