Water filtration in Round Rock
Round Rock's water is some of the hardest in the metro. If you've moved up from Austin and suddenly can't keep your faucets clean, you're not imagining it.
The City of Round Rock blends water from a few sources, and its 2025 report calls the result very hard. Here's what that means for your home.
Your first step
Free water test
- Tested at your tap in Round Rock
- Compared with your utility's latest report
- Written quote, no pressure
Installed systems start around $600. See pricing
Very hard water
Round Rock's 2025 water quality report describes its water as very hard, with an average around 250 mg/L. That's roughly 14 to 15 grains per gallon, more than two and a half times Austin's average.
At that level you'll see scale build fast on fixtures, in water heaters, and on glass. This is the kind of water a softener was made for.
Where the water comes from
Most of it comes from Lake Georgetown, supplied through the Brazos River Authority. The city also gets Lake Travis water treated by the Brushy Creek Regional Utility Authority, plus a small share of Edwards Aquifer groundwater.
The surface water is disinfected with chloramine, averaging 2.15 ppm in 2025. So a good setup here often handles both: a softener for hardness and catalytic carbon for chloramine.
PFAS testing
Round Rock was part of the federal UCMR5 testing program. Its report says the PFAS compounds it tested for, including PFOA and PFOS, were below reporting levels.
Round Rock neighborhoods covered
Coverage includes all of Round Rock, from Old Town to Teravista, Forest Creek, Behrens Ranch, and Paloma Lake. Many Round Rock homes have garage water heaters and softener loops already plumbed in, which can make installs simpler.
Parts of the Round Rock area are served by MUDs rather than the city. Check your water bill to match the right report to your address.
Best fits for Round Rock homes
- Water softeners in Round RockStops white scale, spots, and crust on fixtures caused by hard water.Typical price$1,500 to $3,500
- Hard water treatment in Round RockYour options for scale, spots, and buildup, explained honestly.Typical price$1,500 to $3,500
- Whole house water filtration in Round RockFiltered water at every tap, shower, and appliance in the house.Typical price$2,000 to $4,000
- Free in home water test in Round RockA local pro tests your water at the tap and explains the results in plain English.Typical priceFree
Free water test in Round Rock
What happens next
- We pass your request to a local water treatment installer.
- They call you to pick a time for the free test.
- At your home they test the water and give you a written quote. You decide from there.
Round Rock water questions
How hard is Round Rock water?
Very hard. The city's 2025 report gives an average around 250 mg/L, which is roughly 14 to 15 grains per gallon.
Does Round Rock use chloramine?
Yes, for its treated surface water. The 2025 average was 2.15 ppm. The groundwater portion uses chlorine.
Do I need a softener in Round Rock?
With hardness this high, most homeowners who care about scale and spots end up with one. The free test at your tap confirms it first.
Can I just use a salt free system?
You can, but at Round Rock hardness levels you'll still see spots and some scale. A traditional softener removes the minerals, which is a much bigger difference.
Other services in Round Rock
Find out what's in your Round Rock water
Request a free in home water test. A local installer checks hardness, chlorine or chloramine, and dissolved solids at your tap, then gives you a written quote.