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Kind Water Co installs water softeners, whole-home filtration, and reverse-osmosis drinking systems across the Iowa City corridor, including Coralville, North Liberty, Tiffin, and Solon. Here's the honest part: Iowa City lime-softens its water at the plant, from about 17.5 grains per gallon raw, and the Water Division's 2025 Water Quality Report puts it at about 5 to 8 grains (85–140 mg/L) at the tap. So inside city limits, the real headaches are the chlorine aftertaste that sends campus-area renters to bottled water, plus moderate hardness that leaves some spotting on glass and shower doors. Coralville's plant doesn't soften, North Liberty's water runs moderately hard — hello, spotty shower glass in the new builds — and wells out toward Solon and Lake Macbride bring iron stains, sulfur smell, and grit. That's why we start with a free in-home water test, not a guess. To compare all-in installed prices and book that free test, visit our Iowa City water softener and filtration page.
| Utility | Iowa City Water Division |
|---|---|
| Water source | Iowa River alluvium + deep bedrock wells |
| Hardness at the tap | About 5–8 gpg (85–140 mg/L, moderately hard), per the Water Division's 2025 Water Quality Report |
| Softened at the plant? | Yes — lime softening (from ~17.5 gpg raw) |
By the numbers: Iowa City's source water comes out of the ground very hard — about 300 mg/L (17.5 grains per gallon) — and the city's lime-softening plant brings it down to 85–140 mg/L, about 5 to 8 grains per gallon, at the tap, per the Iowa City Water Division's 2025 Water Quality Report. That is moderately hard on the USGS scale, reaching just into hard at the top of the range, so some spotting on glass and shower doors is normal and a home softener is a comfort choice here rather than a must. North Liberty's reverse-osmosis plant leaves water moderately hard at about 5 to 6 grains per gallon, per the city's guidance when the plant opened, and Coralville's plant filters iron and adds chlorine but doesn't soften at all.
Iowa City is surrounded by working farmland, and what happens on the fields can reach both city and well water — your free Iowa City water report, built from public Iowa DNR and EPA testing data, shows what's actually been detected here.
Here, the kind of water you're treating depends heavily on which side of the city line you're on. Inside the city, on lime-softened Iowa River water, the headache is mostly chlorine, plus moderate hardness at about 5 to 8 grains. Just outside it, in Solon, the acreages around Lake Macbride, and the rural stretches toward Tiffin, families on private wells deal with iron staining, the occasional sulfur 'rotten-egg' smell, and sediment — with no city treatment plant between the ground and the faucet. And across the whole area, agricultural nitrate runoff is a growing concern that many local homeowners ask us about directly. Wherever your water comes from, the fix starts with actually knowing what's in it.
We build a system around your home and your water source, not a one-size box off a truck. Inside Iowa City, where the plant softens the water but it still arrives at about 5 to 8 grains, many homes start with carbon filtration to pull the chlorine taste and smell out of every tap — and a whole-home water softener is a comfort choice, not a must, for families tired of spotty glassware and shower doors. In Coralville and North Liberty, where the water arrives unsoftened or moderately hard, a softener is still the workhorse, stripping out the calcium and magnesium that wreck water heaters and dishwashers.
For the best-tasting drinking and cooking water, we add a 7-stage reverse-osmosis system right at the kitchen sink. RO is what gives renters and homeowners alike a real alternative to hauling bottled water, and it's the most thorough way to reduce the dissolved solids that hard water and a basic filter leave behind.
Out on wells around Solon, Tiffin, and the county's rural edges, we install well-water packages: iron and sulfur removal, UV purification, and a sediment pre-filter to protect everything downstream. The Iowa DNR recommends testing every private well at least once a year for nitrate and coliform bacteria, and our free in-home water test is an easy first step. Prefer to skip the salt? We also offer salt-free conditioners, plus XL and dual-tank systems for larger homes and big families.
Kind Water Co is family-owned, founded in 2021 by Ryan Brunton, and run out of Cedar Rapids, so we're your neighbors, not a national chain routing you to a call center. The crew that shows up in Iowa City is made up of licensed local plumbing professionals we vet, schedule, and stand behind, who handle the job start to finish, and every truck rolls fully insured and bonded.
What goes in your house is genuinely better hardware. We build around NSF/ANSI 42 certified Jacobi carbon, USA-made ResinTech resin, and a lifetime-rated ceramic-disc control valve, then plumb full 1-inch lines rated to 28 GPM, so a busy Iowa City household can run two showers and the dishwasher without the pressure drop a lot of softeners cause. As for the warranty, you're covered for life on parts, for five years on the media, and for a year on labor, and with 0% financing available, clean water doesn't have to wait.
Getting more than one quote? See our honest comparison of Iowa City water softener companies.
We treat water all over the Iowa City corridor and Johnson County, including Coralville, North Liberty, Tiffin, and Solon, plus the acreages and rural wells in between. Whether you're in a brand-new North Liberty subdivision, a century-old home near downtown Iowa City, or a place on well water out past Lake Macbride, we'll come to you, test what's actually coming out of your pipes, and recommend only what your home needs.
You shouldn't have to take anyone's word for what's in your Iowa City water, and you don't have to. We'll come to your home, run a free in-home water test, and show you exactly what we measure for hardness, chlorine, iron, and more, then recommend a system sized to your house with no pressure and no obligation. From there you'll get a clear, no-surprises quote. Call 319-319-6566, email hello@kindwaterco.com, or request your free quote online to schedule a time.
Also serving nearby: Marion · Cedar Rapids · Quad Cities · Dubuque · Waterloo & Cedar Falls · all service areas. Not listed? We travel — call 319-319-6566.
Moderately — Iowa City lime-softens its water at the treatment plant, from about 17.5 grains per gallon raw, but it still reaches the tap at about 5 to 8 grains per gallon (85–140 mg/L), per the Iowa City Water Division's 2025 Water Quality Report. That is moderately hard on the USGS scale, so some spotting on glass and shower doors is normal, and a home softener is a comfort choice rather than a must. Coralville and the area's private wells are the harder story — that's where softening earns its keep.
Yes, and it's a big part of what we do out there. Private wells around Solon, Tiffin, and the edges of Johnson County tend to show up with rusty iron staining, a sulfur smell, and gritty sediment. For those homes we put together a well-water package built around iron and sulfur removal, UV purification, and sediment pre-filtration, sized to your test results and installed by licensed local plumbing professionals we vet, schedule, and stand behind.
Start with a certified lab test. Our 7-stage reverse osmosis systems are certified to NSF/ANSI 58 for total dissolved solids, not for nitrate. Good to know: Iowa City's own plant uses deep bedrock wells for nitrate dilution, per the city's Water Division. On private wells, we test first so you know exactly what you're treating.
Every number on this page comes from a public record. Here is where to open each one yourself.
Whole-home water softening, filtration, and reverse-osmosis drinking water — professionally installed and built to last a lifetime.
Serving Des Moines, Polk County & homes across Iowa
Kind Water Co is a d/b/a of Zero Cap Investments LLC · 600 SE 15th St, Des Moines, IA 50317
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