A reverse osmosis (RO) drinking water system in Iowa costs $800 installed from Kind Water Co — the complete all-in price for an under-sink system, including equipment, installation by a licensed local plumber, a lifetime parts warranty, and taxes. Prefer a tankless model? That's $900. Bundled with a whole-home water softener, it's $2,850 complete.
If you've been pricing RO systems online, you've probably seen numbers all over the map. National cost-data sites quote anywhere from $656 to $2,870 installed, with an average around $1,476 — and those figures typically exclude tax and swing widely depending on the home and who does the install. Here's how the real numbers work in Eastern Iowa: what $800 actually buys, why the softener bundle is the smarter math for most families, and what you'll spend per year once the system is quietly doing its job under your sink.
Our standalone price covers a five-stage reverse osmosis drinking water system installed at your kitchen sink, with its own dedicated faucet and an alkaline mineral filter included as standard for crisp, great-tasting water. RO systems certified to the NSF/ANSI 58 standard must reduce total dissolved solids by at least 75%, which is why RO is the go-to for drinking and cooking water.
The $800 is a complete installed price — no line-item surprises. That means:
Prefer a slimmer cabinet footprint? Our seven-stage tankless RO — alkaline filtration built in — is $900 all-in. Either way, we offer 0% financing, and military members and first responders get $100 off.
Here's the honest math. Our whole-home system without the RO — a water softener plus whole-home filtration — is $2,500 installed. The same system with RO is $2,850. That means adding RO to a whole-home project costs just $350 — half the standalone price — because the plumber is already at your house doing the work.
And most Eastern Iowa homes genuinely benefit from both. Cedar Rapids' own water FAQ describes city water as moderately hard at 6–9 grains per gallon, and in Marion, The Gazette has reported unsoftened water in the 18–20 grain range. The softener protects your whole house — water heater, fixtures, laundry — and is noticeably gentler on skin and hair, while the RO system polishes the one tap your family drinks from. If you're in the Cedar Rapids area, you can also check what's in Marion's water before you decide.
RO ownership is refreshingly boring. Filter replacements are bundled into our annual service visit — $199 per year for tank-style RO homes, $249 for tankless, since tankless filter sets cost more — and the same visit includes a water test and a full system check. The membrane itself — the heart of the system — is a longer-lived component; the University of Nebraska–Lincoln's drinking water treatment guide notes that pre-filters and post-filters require regular replacement, while membrane timing depends on your water volume and quality.
A few other numbers worth knowing: the trip fee is waived for your entire first year, travel is free for the first 50 miles, and if a specific part ever needs attention down the road, a known-issue service visit starts at a $99 trip charge.
The International Bottled Water Association has calculated that a person drinking the recommended 64 ounces a day from single-serve bottles would spend about $400 a year. For a family of four, that's roughly $1,600 every year — plus the hauling, the fridge space, and the recycling bin that's always full.
Compare that to an $800 system with a $199 annual service that includes its filters: the RO pays for itself inside the first year for most families, and every glass after that is essentially pennies. One more point from the CDC worth knowing: boiling water will not remove chemical contaminants — filtration technologies like RO are the tool for that job.
Pitchers are a fine starting point, but they're a treadmill. Brita's own guidance is to replace the standard pitcher filter every 40 gallons — about every 2 months — which means six filters a year, forever, plus the constant refilling.
There's also a difference in what each can do. Pitcher filters use activated carbon, which the University of Nebraska–Lincoln notes can reduce pesticides such as atrazine, and which handles chlorine taste well. But carbon alone doesn't address dissolved contaminants like nitrate — Iowa State University Extension notes that removing nitrate takes reverse osmosis, distillation, or anion exchange. An NSF/ANSI 58 certified RO system combines carbon filtration with a membrane that cuts total dissolved solids by 75% or more.
When national quotes climb toward that $2,870 top end, it's usually the extras and the unknowns. Common add-ons and their prices with us:
Elsewhere, tricky under-cabinet plumbing, add-ons quoted after the fact, and prices that leave out tax can all nudge the final bill well past the sticker. Our price is flat and published, and the add-ons are priced before anyone shows up.
Yes — RO is actually one of the best finishing touches for a well home, as long as the water feeding it is treated first. On wells we install the tank-style RO, which holds steady pressure on well water. Sediment, iron, and hardness are tough on RO membranes, so we pair the drinking system with the right well water treatment up front — a pre-sediment filter is $500, and iron and sulfur (which cause staining and that rotten-egg smell — the EPA classifies iron as a secondary, aesthetic standard at 0.3 mg/L) get handled by dedicated equipment ahead of the RO.
Two friendly notes for well owners: the Iowa DNR recommends testing private wells every year for coliform bacteria and nitrate, and the Iowa Private Well Grants Program offers free lab testing, arranged through your county environmental health office. It's a genuinely good deal — take them up on it.
| Option | Upfront | Yearly | Best for |
|---|---|---|---|
| Filter pitcher | Low | New filter every ~2 months (Brita: every 40 gallons) | Chlorine taste on a small budget |
| Bottled water | None | ~$400 per person (IBWA) | Grab-and-go convenience |
| Under-sink RO, standalone | $800 all-in ($900 tankless) | $199 annual service, filters included | Homes that already have a softener |
| Softener + RO bundle | $2,850 all-in | Annual service from $199 + softener salt | Most Eastern Iowa homes on hard water |
Ready for a real number for your home? Get an instant quote in about a minute, or request a quote and we'll walk you through the options — kindly, and with zero pressure. Our name is our promise.
An under-sink RO system costs $800 installed from Kind Water Co ($900 for the tankless model) — all-in prices covering equipment, installation by a licensed local plumber, a lifetime parts warranty, and taxes. Bundled with a whole-home water softener, the package is $2,850 complete. National cost-data sites quote $656–$2,870 installed, but those figures typically exclude tax and vary by installer.
For most families, yes — the math is quick. The International Bottled Water Association pegs bottled water at about $400 per person per year at just 64 ounces a day, so a family of four spends roughly $1,600 annually. An $800 RO system with a $199 annual service — filters included — typically pays for itself within the first year, and NSF/ANSI 58 certified systems reduce total dissolved solids by at least 75%.
Plan on our annual service visit — $199 per year for tank-style RO homes, $249 for tankless — which includes RO filter replacements, a water test, and a full system check. The membrane is a longer-lived part whose timing depends on water volume and quality, and the trip fee is waived your entire first year. Travel is free for the first 50 miles.
Yes — RO is an excellent fit for well homes, provided the feed water is treated first. We use the tank-style RO on wells and pair it with a pre-sediment filter ($500) plus the whole-home treatment the well needs. Iowa State University Extension notes RO is one of the methods that reduces nitrate, and the Iowa DNR recommends testing private wells annually — with free testing through the Iowa Private Well Grants Program.
Yes. The CDC notes that reverse osmosis reduces nitrate, and Iowa State University Extension lists RO, distillation, and anion exchange as the treatment methods that address it. Nitrate is odorless and tasteless, so a lab test is the only way to know your level — and note that boiling water will not remove it or other chemicals, per the CDC.
Yes — Kind Water Co offers 0% financing on our systems, including the $800 standalone under-sink RO and the $2,850 softener-plus-RO bundle. Military members and first responders also receive $100 off. Every price is all-in — equipment, installation by licensed local plumbing professionals, lifetime parts warranty, and taxes included — so the payment you see is the whole story.
Whole-home water softening, filtration, and reverse-osmosis drinking water — professionally installed and built to last a lifetime.
Serving Marion, Cedar Rapids & surrounding Linn County communities
Kind Water Co is a d/b/a of Zero Cap Investments LLC · 2258 Bison St, Apt B, Marion, IA 52302
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