Hard Water Treatment

Hard Water Treatment in Fort Bend County

Signs You Have Hard Water

You don't need a test kit to suspect hard water. These are the things Fort Bend homeowners notice first:

• White, chalky crust on faucets, shower heads and around drains.
• Spots on glasses and dishes, and a cloudy film on shower glass that comes back days after cleaning.
• Soap and shampoo that don't lather well, and soap scum on tubs and tile.
• Scale inside kettles, coffee makers and the ice maker.
• Laundry that feels stiff, and skin or hair that feels different after a shower.
• Scale collecting in the water heater, or a tankless heater that needs frequent descaling.

None of these is a diagnosis on its own. Your water system's published hardness, or a test at your tap, settles it. To find out where your water stands, call 281-979-3405 or send us your ZIP code.

What Is Hard Water?

Hardness is mostly dissolved calcium and magnesium, which water picks up as it moves through rock and soil. It is reported two ways: in milligrams per liter as calcium carbonate (mg/L, the unit in lab results and water reports) and in grains per gallon (gpg, the unit softeners are sized in). One grain per gallon equals 17.1 mg/L.

The U.S. Geological Survey groups water into four classes:

• Soft: 0 to 60 mg/L (up to about 3.5 gpg)
• Moderately hard: 61 to 120 mg/L (about 3.5 to 7 gpg)
• Hard: 121 to 180 mg/L (about 7 to 10.5 gpg)
• Very hard: more than 180 mg/L (above about 10.5 gpg)

The USGS describes hardness as a nuisance rather than a health concern. Hardness isn't a regulated drinking-water contaminant, which is why most annual water quality reports leave it out. The state's sample results are the main public source.

Why Fort Bend Hardness Depends on Your Water System

Hardness here varies by water system, not by city or ZIP code. Much of the county has drawn on groundwater from the Chicot and Evangeline aquifers, and more systems now blend in treated surface water as the county moves away from wells to slow land subsidence. Each system's mix of wells and sources gives it different water, and one ZIP code can hold several systems.

Sample results published by the Texas Commission on Environmental Quality show the spread:

• Fort Bend County MUD 23 (Missouri City / Sienna area): 1.7 to 4.4 gpg (28.3 to 75.1 mg/L), two samples, April 2024 and February 2026.
• Quail Valley Utility District (also Missouri City / Sienna area): 7.8 to 11.6 gpg (134 to 199 mg/L), three samples taken March 26, 2026.
• Pecan Grove MUD (Richmond area): 3.6 to 7.7 gpg (60.8 to 132 mg/L), six samples, January 2024 to February 2026.
• City of Needville: 15.4 to 17.4 gpg (263 to 298 mg/L), three samples taken February 9, 2026.

That runs from soft to very hard, and the first two serve the same part of the county. Look up yours on our hard water by water system page.

What Hard Water Does in Your Home

The USGS and the EPA's WaterSense guide describe the same effects:

Fixtures, Glass and Cleaning

As hard water dries, it leaves its minerals behind as spots and crust. Calcium also reacts with soap to form soap scum, so you need more soap and detergent and still get a film on tile, tubs and shower glass.

Water Heaters and Appliances

Heating hard water leaves solid calcium carbonate deposits. Over time, scale in water heaters, dishwashers, coffee makers and ice makers can shorten their life and raise heating costs. Tankless water heaters are especially sensitive, because the scale forms inside a compact heat exchanger.

Skin and Hair

Many people say their skin feels tight or their hair feels dull after showering in hard water, and that both feel different on softened water. That comes down to how soap and minerals interact and rinse off. It is about feel, not health.

Treating Hard Water: Softener or Conditioner?

The equipment that removes hardness is a water softener. Ion-exchange resin trades calcium and magnesium for sodium or potassium, and the softener periodically flushes the captured minerals to a drain. Look for certification to NSF/ANSI 44, the standard for water softeners. We size softeners from your system's published hardness and your household's water use; see water softeners.

Salt-free conditioners do not remove hardness minerals. Most aim to change how calcium behaves so less of it sticks as scale, and they are tested under a different standard (IAPMO/ANSI Z601 for scale reduction devices, per the EPA's guide). Because the minerals stay in the water, a hardness test reads the same and soap still reacts with them. A conditioner can suit a home where a drain or salt isn't an option, but it isn't a softener.

Do Filters or Reverse Osmosis Fix Hard Water?

A carbon filter doesn't remove hardness; it handles chlorine, chloramine and sediment. An under-sink reverse osmosis system removes most dissolved minerals at one tap, but the rest of the house, including the water heater, still gets hard water, and hardness wears the RO membrane faster. On hard, chloraminated water the usual setup is a catalytic carbon filter followed by a softener, with RO at the kitchen sink if you want it.

How to Find Your Water's Hardness

Start with the published figure. Find your system on our hard water by water system page, or search the TCEQ's Drinking Water Viewer for its sample results. Those show what the system delivered on the sample dates. A hardness test at your tap shows what reaches your home today. For sizing a softener we use both when we have both, and we tell you which one we relied on. Not sure which system serves you? Your water bill names it, or call 281-979-3405 and we'll look it up.