Kind Water Co installs water softeners, reverse osmosis systems, and whole-home filtration in Marengo, Iowa. Marengo's water comes from Wells #10, #11 and #12 in a shallow alluvial sand-and-gravel aquifer — one the Iowa DNR rated highly susceptible to surface contamination, which is unusual around here and worth understanding.
| Quick fact | Details |
|---|---|
| Utility | Marengo Water Supply (PWSID 4843033), county seat of Iowa County |
| Water source | Groundwater from Wells #10, #11 and #12 in a shallow alluvial sand-and-gravel aquifer. The 2025 report states: "The Alluvial aquifer was determined to be highly susceptible to contamination" — the DNR names fertilizer, spills and leaking tanks as the kinds of surface sources that reach an aquifer like this |
| Softened at the plant? | No softening is stated in the 2025 report and no hardness figure is published |
| One distinguishing fact | 2025 results: nitrate 1.2 ppm against a 10 ppm limit, sodium 17.7 ppm, fluoride 0.1 ppm, TTHM 38 ppb and HAA5 18 ppb as running averages, and chlorine printed at a 3.8 ppm running annual average against a 4.0 ppm maximum residual disinfectant level — no violations |
Most towns in this survey draw from deep bedrock that the Iowa DNR describes as low susceptibility. Marengo is the exception. Its wells sit in a shallow alluvial aquifer — river-deposited sand and gravel — and the 2025 report is blunt about what that means: the aquifer "was determined to be highly susceptible to contamination." That is not a claim about current water quality; it is a statement about how easily surface activity can reach the source.
The current numbers are reassuring on that front. Nitrate measured 1.2 ppm in 2025 against a 10 ppm maximum contaminant level — low, and consistent with a system that is watching. Sodium came in at 17.7 ppm and fluoride at 0.1 ppm, both sampled 8/13/2025, with chromium at 2.0 ppb and selenium at 1.4 ppb.
Two figures shape what most Marengo households actually want. Chlorination byproducts run at 38 ppb for total trihalomethanes and 18 ppb for HAA5 as running averages — compliant, and typical for a chlorinated shallow-aquifer supply. And chlorine itself is printed at a 3.8 ppm running annual average against a 4.0 ppm maximum residual disinfectant level. That is a legally compliant, deliberately maintained residual — the disinfectant that keeps the distribution system safe — and it is also why chlorine taste is the complaint we hear most often in this town. A reverse osmosis system at the kitchen sink is the ordinary fix for taste and odor at the tap. Our chlorine taste page walks through the options.
Marengo publishes no hardness figure, so we will not quote one — alluvial aquifer water in Iowa is typically hard, but "typically" is not a number. Spotted glassware, film on the shower door, soap that will not lather and scale in the water heater are the practical symptoms; a free ten-minute test at your sink turns them into a measurement. Compare towns that do publish figures on our Iowa hardness by city page.
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If Marengo's municipal wells are in a highly susceptible alluvial aquifer, the shallow private wells on the acreages around town are drawing from the same kind of ground with none of the monitoring. That makes annual testing genuinely worth doing here. The Iowa DNR recommends testing every year for bacteria and nitrate, and Iowa's Private Well Grants program covers free county lab testing through your county environmental health office.
Iowa State University extension materials note that nitrate is odorless and tasteless — you will never notice it — and that reverse osmosis, distillation and anion exchange are the technologies that remove it. The CDC notes boiling does not remove chemical contaminants. See our nitrates in Iowa water page, well water guide, free well testing, or well water treatment.
Family-owned, founded 2021, headquartered in Marion. Licensed local plumbing professionals we vet, schedule and stand behind do every install — insured and bonded. Lifetime parts warranty, five years on media, one year on labor, and a quote that does not change.
We test at your kitchen sink, show you your own numbers, and leave a written price the same visit. No obligation. Call or text 319-319-6566, email ryan@kindwaterco.com, or get an instant quote.
We serve Iowa County and the Cedar Rapids–Iowa City corridor, including Williamsburg, Cedar Rapids, North Liberty, Iowa City, and Vinton.
From Wells #10, #11 and #12 in a shallow alluvial sand-and-gravel aquifer. The city's 2025 water quality report states that the Alluvial aquifer was determined to be highly susceptible to contamination — a statement about how easily surface activity can reach the source, not about current quality. Nitrate measured 1.2 ppm against a 10 ppm limit.
Because there is a deliberate disinfectant residual in it. The 2025 report prints chlorine at a 3.8 ppm running annual average against a 4.0 ppm maximum residual disinfectant level — compliant, and the reason the water stays safe across the distribution system. A reverse osmosis system at the kitchen sink is the standard fix for taste at the tap, at $800 installed.
The 2025 report lists nitrate at 1.2 ppm against the 10 ppm maximum contaminant level — low, and no violation. It is worth watching in a shallow alluvial aquifer, which is exactly why the city tests. If you are on a private well nearby, nobody tests it for you: Iowa's Private Well Grants program covers free county lab testing.
No hardness figure is published in the city's report, so we do not quote one. No softening step is stated either, so whatever the aquifer delivers reaches your tap. Alluvial Iowa water is typically hard, but the only number that matters is yours — our in-home test takes about ten minutes and costs nothing.
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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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