Indianola runs on water from 2,600 feet down. Four deep wells into the Cambrian-Jordan sandstone feed a lime softening plant that Indianola Municipal Utilities says “reduces the natural hardness to 100-120 parts per million, or 5.8-7 grains per gallon.” That is softer than Des Moines, and it comes with something the metro cannot buy: no river nitrate season at all.
| Indianola at a glance | What the record shows |
|---|---|
| Who supplies the water | Indianola Municipal Utilities, PWSID IA9133075, 15,833 people served (EPA SDWIS). IMU is independent and is not a Central Iowa Water Works member |
| Where it comes from | Four deep wells into the Cambrian-Jordan sandstone aquifer at approximately 2,600 feet, pumping an average of 1.2 million gallons of raw water a day |
| Softened at the plant | Yes, by lime softening. The plant is designed for 3.3 million gallons a day and currently runs at roughly a third of capacity; treated water passes through a 700,000-gallon clear well into two towers holding 1.7 million gallons |
| Published hardness | 100 to 120 parts per million, or 5.8 to 7 grains per gallon (Indianola Municipal Utilities, indianola.com/water) — one of only two Iowa metro utilities publishing a finished-hardness range in both units |
The Des Moines metro spent parts of both 2025 and 2026 under lawn-watering restrictions because the Raccoon and Des Moines Rivers ran above the 10 mg/L nitrate limit for months at a time. As of 8 June 2026 the Raccoon had been over the limit for 136 days and the Des Moines River for 117. None of that reaches Indianola.
Water from 2,600 feet down in Cambrian-Jordan sandstone has been underground far too long to carry a spring runoff signal. It is one of the genuine advantages of an independent deep-well utility, and it is why the drinking-water conversation in Indianola looks different from the one in Des Moines or Ankeny. Our explainer on nitrate in Iowa water covers why the two source types behave so differently.
Warren County is not on a single system. Alongside Indianola Municipal Utilities, Warren Water District — PWSID IA9133701, serving 20,095 people — is a Central Iowa Water Works founding member and takes Des Moines Water Works water. So a rural Warren County address a few miles outside Indianola may be drinking treated Raccoon River water with the metro's nitrate profile, while an address inside the city is on lime-softened Jordan groundwater.
That is not a small distinction. It changes the hardness you start from, whether nitrate is part of the conversation at all, and what a correctly sized system looks like. If you are in Warren County and not certain which utility bills you, the bill itself will tell you, and a free test will tell you the rest.
Lime softening at Indianola takes deep Jordan water — which starts genuinely hard, as most Cambrian-Ordovician groundwater in Iowa does — and lands it at 5.8 to 7 grains per gallon. On the EPA scale that is still hard water, and it is meaningfully softer than the 8.76 grain target Des Moines Water Works publishes and far softer than the 20-plus grains common in Eastern Iowa.
In practice that means you will still see spotting on glassware and film on shower doors, and your water heater is still accumulating scale, just more slowly than most of the state. A softener here is a reasonable purchase for many households and an unnecessary one for others, and the deciding factor is your own reading rather than the city average. Our guide to the signs you need a softener is a fair starting point.
Every price is all-in: equipment, installation, taxes and a lifetime parts warranty.
Maintenance plans are $199 a year for a tank-RO home and $249 for a tankless-RO home. A diagnostic call is $199; a known-issue trip is $99 plus the part. We run 0% financing and take $100 off for military and first responders. Ask for the written breakdown before booking, or start one from our instant quote.
Plenty of Warren County acreages are on neither IMU nor Warren Water District, drawing private wells with no treatment behind them at all. Our well water system is a dual-tank build at $3,450, or $3,800 with tank RO, with UV disinfection at $700 and sediment pre-filtration at $500 when the test calls for them. We fit tank RO rather than tankless on a well, because high dissolved solids cost a tankless unit its pressure. Start with free well water testing.
Kind Water Co is licensed and insured, and our softeners are built from NSF/ANSI 44 certified components and our reverse osmosis systems are certified to NSF/ANSI 58. Licensed local plumbing professionals we vet, schedule and stand behind carry out the install. Pricing is published and all-in, and nothing gets added once the van is in the drive that we have not told you about first. Distance and site conditions are the only variables.
Indianola publishes a better hardness number than most Iowa cities, and it is still a plant average across 15,000 people rather than a reading from your kitchen. We come to you, test hardness, iron and the rest, and leave you the numbers and a written quote at no charge, whichever way you decide. Book your free in-home water test.
Indianola Municipal Utilities states that its lime softening process “reduces the natural hardness to 100-120 parts per million, or 5.8-7 grains per gallon.” That is softer than the 8.76 grain target Des Moines Water Works publishes, and it is one of only two finished-hardness ranges published in both units anywhere in this metro.
No. Indianola draws from four deep wells in the Cambrian-Jordan sandstone aquifer at roughly 2,600 feet, water far too old to carry a spring runoff signal. The lawn-watering restrictions that followed the Raccoon and Des Moines Rivers running above the 10 mg/L nitrate limit in 2025 and 2026 applied to river-fed systems, not to Indianola.
No. Indianola Municipal Utilities serves the city from deep Jordan wells, while Warren Water District, PWSID IA9133701 serving 20,095 people, is a Central Iowa Water Works founding member taking Des Moines Water Works river water. Two addresses a few miles apart in Warren County can be on completely different sources. Your bill names your utility.
Often, though a smaller one than most of Iowa needs. At 5.8 to 7 grains per gallon the water is still classed as hard, so scale keeps accumulating in a water heater and film keeps forming on glass, just more slowly. Whether that justifies a softener in your house is what the free in-home test is for.
A Kind Water Co softener is $2,500 all-in, covering equipment, installation, taxes and a lifetime parts warranty, or $2,850 paired with reverse osmosis. The XL build is $2,800, or $3,150 with RO. Softeners use NSF/ANSI 44 certified components and RO systems are certified to NSF/ANSI 58. Financing is 0%, with $100 off for military and first responders.
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 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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