Georgetown Hard Water: Why Your Number Depends on Your Plant

The answer depends on your treatment plant

Georgetown doesn't have one hardness number. The Georgetown Utilities: water hardness information page lists it by treatment plant system:

Plant system	Hardness (mg/L as CaCO3)	Grains per gallon	USGS class
Lake Georgetown and Southlake WTP	176–178	about 10–11	Hard
Park Plant and Southside WTP	309–320	about 19	Very hard

Same city, nearly double the hardness. That's why a softener set up for a friend across town may be wrong for your house.

What else is in the water

The City also publishes a mineral profile: calcium 44.8–95.5 mg/L, magnesium 11.5–19.7, sodium 20.4–30.4, sulfate 29–38, total dissolved solids 284–419, and alkalinity 133–270. Calcium and magnesium are the hardness. Everything else affects taste and how scale forms.

Find out which water you have

1. Call Georgetown Utilities Customer Care at (512) 930-3640 and ask which plant serves your address.
2. Test with strips or a drop kit, which the City says are sold at hardware, pool supply and home stores.
3. Compare your reading with the table above.
4. Or let us do it. We test on every visit and show you the number.

What each level means for your equipment

At 10–11 grains: scale builds steadily. Tank water heaters collect sediment over the years. Aerators and showerheads need a soak now and then. Tankless units need descaling on the manufacturer's schedule.

At 19 grains: everything speeds up. Heaters pop sooner, tankless units throw scale codes, faucet cartridges stiffen, and glass shower doors etch. The City itself notes that hard water can mean more soap, routine descaling and softener adjustments.

A simple decision guide

If you have…	Consider
10–11 grains, tank heater, no complaints	Yearly heater flush per the manual. Vinegar for fixtures. You may not need a softener.
10–11 grains and a tankless unit	A descaling routine with isolation valves. A softener extends the time between descales.
19 grains, any heater	A softener sized to your reading and household. Kitchen RO if you want filtered drinking water.
Spots only, renting or moving soon	Rinse aid, squeegee, and a point-of-use filter. No plumber needed.

Thinking about going tankless? Read tankless water heaters in Georgetown alongside this. Replacing a tank? Our water heater installation page covers sizing.

What affects cost

• Softener capacity for your plant's hardness and your household
• An existing softener loop or a main-line cut-in, drain and power location
• Tankless specifics: gas sizing, venting, condensate, isolation valves
• Old lines narrowed by scale, where repiping beats treatment

We quote in writing before work starts. Free estimates.

On our visit

1. We test your tap and tell you which plant your water most likely came from.
2. We check your water heater for sediment, anode and valve condition.
3. We recommend what fits your number, which might be nothing.

San Gabriel Plumbing is licensed & insured. Heater already struggling? See water heater repair, or call (737) 257-1953, 24/7.

Georgetown hard water questions

How do I know which treatment plant serves my house?

Ask Georgetown Utilities Customer Care at (512) 930-3640, or test your tap with a hardware-store kit. A reading near 10 to 11 grains suggests Lake Georgetown or Southlake water. A reading near 19 suggests Park or Southside. We also test on every visit.

Is 10 grains worth softening?

The USGS calls that range hard, not very hard. Many homes at 10 to 11 grains do fine with good water heater maintenance and occasional fixture descaling. If you're installing tankless or hate spotting, a softener still pays off.

Is 19 grains worth softening?

At 19 grains, very hard by the USGS scale, we recommend treatment for most households, especially with a tankless heater. Scale builds fast at that level.

Can my hardness change?

Yes. The City notes that hardness depends on the source and treatment plant serving your area, and its published figures are ranges. If your softener suddenly underperforms or overperforms, retest before adjusting.

Is Georgetown's hard water unhealthy?

Georgetown Utilities says the minerals are safe to consume and hardness isn't a health concern. It's about appliances, soap use and scale.

What about sodium from a softener?

Georgetown's water already contains some sodium (20.4 to 30.4 mg/L, per the City). An ion-exchange softener adds more in proportion to hardness removed. Anyone on a sodium-restricted diet should ask their doctor. Reverse osmosis at the kitchen tap or potassium chloride are common alternatives.

Sources

• Georgetown Utilities: water hardness information: hardness by plant, USGS classes, mineral profile, home testing, Customer Care number.
• Georgetown Utilities: utility information.