A reverse osmosis drinking-water system in Killeen costs $400–$1,200 installed under the kitchen sink. It polishes treated Belton Lake water past the standards — dissolved solids, chlorine byproducts, and summer reservoir taste — at the tap your family actually drinks from.
What RO does that whole-house systems don't, what's honestly in the tap water, and the bottled-water math.
Drinking water is a different problem than shower water
Whole-house equipment protects plumbing and comfort; drinking water is about the two liters a day going into people. RO earns its place there: a membrane that removes dissolved solids by the ninety-percent range, carbon stages for chlorine and byproducts — Killeen's own report lists TTHMs under the federal limit, and RO takes them lower still — and a final polish so the result tastes clean instead of stripped. Coffee and tea notice first; ice comes out clear; the filler pitcher in the fridge retires.
What the install includes
- Under-sink RO unit — sediment, carbon, membrane, and polishing stages
- Its own faucet at the sink — drinking water on demand, main tap untouched
- Fridge line option — RO water to the ice maker and door dispenser
- Storage tank sized to household drinking habits
- A filter schedule in writing — $60-$120 a year, changed in minutes
What RO day looks like
An under-sink install runs one to two hours: the unit mounts in the cabinet, the dedicated faucet goes in at the sink deck, the storage tank tucks behind, and the optional fridge line runs to the ice maker. We commission with a TDS meter and leave the reading with you — tap water in, RO water out, the difference in numbers. Filter changes are homeowner-simple, and the written schedule says which cartridge, when, and what it costs, so the system never becomes a mystery under the sink.
The honest pairing
RO and a water softener installation solve different halves: the softener stops scale house-wide, RO perfects the drinking tap. Homes that do both get them sized together — softened feed water extends RO membrane life measurably, which is why the combined quote is the better long-term math — and homes that can only do one get a straight answer about which their situation actually needs. For a lot of rentals around post, the $500 RO unit is the whole answer, and we're happy to say so in writing.
Frequently asked questions
What does a reverse osmosis system cost in Killeen?
$400-$1,200 installed for a quality under-sink unit with its own faucet. Annual filter changes run $60-$120. It's the cheapest meaningful water upgrade in the metro — and the one renters can usually get approved.
What does RO remove that the city doesn't?
Dissolved solids, chlorine and its byproducts (Killeen's report lists TTHMs below limits but present), and the taste character of a warm Texas reservoir. RO strips water to near-nothing, then a polishing stage makes it taste clean rather than flat.
Is bottled water cheaper than RO?
Not for long. A family buying cases weekly spends more in a year than an RO system costs installed — then keeps spending. The under-sink unit wins the math by month ten or so and skips hauling cases in Texas heat.
Can renters install RO?
Usually yes — it's an under-sink connection most landlords approve, and some property managers around post pre-approve it. It also moves with you at the next PCS if you take it.
Get a free Killeen estimate
Tell us what you're seeing at your fixtures and we'll recommend a system sized to your home. We reply the same business day.