2026 Edition · Reviewed Annually

Missouri's water treatment providers, reviewed with an expert eye.

Hard water, iron staining, and untreated wells are everyday problems in Missouri homes. We curate the providers who solve them, hold each one to the same five criteria, and mark the standout with our Expert Pick seal.

Browse the directory How picks are chosen

Find by need

The Directory

Water treatment providers serving Missouri

Six providers reviewed for the 2026 edition. Our Expert Pick leads the list; standard listings follow in alphabetical order.

Our Expert Pick for 2026

Jones Air & Water

Softening
RO
Wells
Iron

Family-owned since 1995 and still owner-operated, Jones Air & Water is the provider we recommend first for Missouri homes. Every visit starts with free in-home water testing, so the equipment quoted matches the water you actually have, whether the problem is hardness, drinking water, a private well, or iron.

Coverage St. Charles, Lincoln, Warren, Franklin, and Jefferson counties, plus the St. Louis metro.

Family-owned since 1995
Owner-operated
Free in-home water testing

(636) 899-1040 Request a callback joneswater.com

Culligan

Softening
RO

One of the most widely recognized names in residential water treatment, operating through locally run dealerships. Product lines include water softeners and reverse osmosis drinking water systems.

Coverage Missouri service areas vary by local dealership.

Contact through the brand's local dealer network.

EcoWater

Softening
RO

A manufacturer of water softeners, conditioners, and reverse osmosis drinking water systems. Products are sold and installed through authorized local dealers.

Coverage Missouri service areas vary by local dealership.

Contact through the brand's local dealer network.

Hague Quality Water

Softening
RO

An Ohio-based manufacturer known for its multi-function WaterMax treatment system, with reverse osmosis drinking water options. Equipment is distributed through independent authorized dealers.

Coverage Missouri service areas vary by local dealership.

Contact through the brand's local dealer network.

Kinetico

Softening
RO

Known for non-electric, twin-tank water softeners powered by moving water rather than a plug-in timer. Systems, including reverse osmosis drinking water units, are sold and serviced through authorized dealers.

Coverage Missouri service areas vary by local dealership.

Contact through the brand's local dealer network.

RainSoft

Softening
RO

A national home water treatment brand offering water softeners and reverse osmosis drinking water systems. Sales, installation, and service are handled by local authorized dealers.

Coverage Missouri service areas vary by local dealership.

Contact through the brand's local dealer network.

Find by need

Start with the problem you can see and taste

Four common Missouri water problems, what actually fixes each one, and which listings fit.

Hard water

Much of Missouri draws water through limestone, so scale on fixtures, spotted glassware, and dry skin are common complaints. A properly sized water softener removes the calcium and magnesium behind all three. Have your hardness tested before you buy, because sizing depends on the actual grains per gallon.

Listings that fit Every provider in this directory installs softeners. Jones Air & Water, our Expert Pick, carries the Softening specialty and includes free in-home hardness testing. Culligan, EcoWater, Hague Quality Water, Kinetico, and RainSoft also offer softening through their dealers.

Drinking water

For better tasting water at the kitchen tap, a reverse osmosis system polishes a single faucet rather than the whole house. RO removes most dissolved solids, which is why it is the standard answer for drinking and cooking water. It pairs well with a softener, which protects the RO membrane from scale.

Listings that fit All six listings carry the RO specialty. Jones Air & Water is our Expert Pick for it, and the five national brands offer RO drinking water systems through their local dealers.

Well water

Private wells are the homeowner's own responsibility, and untreated well water can carry hardness, iron, sulfur odor, and sediment all at once. Treatment starts with a test, then equipment matched to what the test finds. Expect a different setup than a city-water home would need.

Listings that fit Jones Air & Water is the one listing here that carries a dedicated Wells specialty, backed by free in-home testing. If you prefer a national brand, ask its local dealer whether they design systems for private wells before booking a visit.

Iron staining

Orange streaks in tubs and toilets and a metallic taste point to iron, which is common in Missouri groundwater. Standard softeners handle only small amounts, so meaningful iron usually calls for dedicated iron filtration ahead of the softener. A test tells you the level and the right fix.

Listings that fit Jones Air & Water is the one listing here that carries the Iron specialty tag. Its free in-home test measures iron before anything is quoted, which is exactly the order we recommend.

Expert Pick Service

Request a callback from our Expert Pick

Tell us where you are, and Jones Air & Water, our Expert Pick for 2026, will call you back to schedule a free in-home water test.

Questions

Frequently asked questions

What does Expert Pick mean?

Expert Pick is our editorial seal. It goes to the provider that best meets the five criteria on our methodology page: local ownership, response time, included testing, transparent pricing, and range of specialties. For 2026 the seal belongs to Jones Air & Water. Sponsored placements appear on this site, but the seal itself reflects our editorial criteria.

Why is hard water such a common problem in Missouri?

Much of Missouri's groundwater moves through limestone, which loads it with dissolved calcium and magnesium. That is what makes water hard, and it is why scale on fixtures, spotted dishes, and shortened appliance life are frequent complaints across the state. A properly sized water softener is the standard fix.

What is the difference between a water softener and a reverse osmosis system?

A softener treats every tap in the house by removing the hardness minerals that cause scale. A reverse osmosis system treats one tap, usually in the kitchen, and removes most dissolved solids for better drinking and cooking water. Many Missouri homes run both, with the softener protecting the RO unit.

Do I really need a water test before getting a quote?

Yes. Softener sizing, iron filtration, and well water treatment all depend on measured numbers, not guesses. Our Expert Pick, Jones Air & Water, includes free in-home water testing, and included testing is one of the five criteria we score every provider against.

How does Missouri Water Experts make money?

This site features sponsored placements and may be compensated when you request a quote through it. That compensation does not change the five criteria we use, and Expert Picks reflect our editorial criteria. The full process is published on our methodology page.