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State directory · MO

Water treatment service in MO

27 verified water firmsacross 1 city. This page carries the state licence lookup and the permit offices; each city page carries the firm records and local cost band.

Verified listings27 verified listings1 citySpring band $2,500–$6,000

Information last verified: 8 November 2026.Dataset compiled 8 November 2026.

What qualifies as a listing

How listings are verified →

MO licence and permit rules

Check the licence with the state board before work starts. The state lookup is theMO contractor licensing.

Permits are local. Kansas City: Ask whether the job needs a permit and who pulls it.Each city page links its own permit office.

Cost

Sewer line costs across MO

The national band is from the site’s cost guide, checked 2026-11-08. The state range applies the metro factors in the dataset; it is an illustrative planning band, not a local price survey.

JobNational rangeMO planning rangeWhat it includes
Whole-house softener, installed$2,500–$6,000$2,500–$6,000Typical US range
Whole-house filtration$3,500–$9,000$3,500–$9,000Typical US range
Well tank replacement$1,200–$2,800$1,200–$2,800Typical US range
Well pump replacement$900–$2,200$900–$2,200Typical US range
Reverse osmosis, installed$3,500–$8,000$3,500–$8,000Typical US range
Annual service, no salt$150–$400$150–$400Typical US range
Cities

Water treatment service by city in MO

FAQ

Water treatment service in MO: common questions

How many water firms are listed in MO?

27 verified water firms are listed across 1 city in MO. Each city page shows the date its records were last verified.

Does MO license water contractors?

Check the licence with the state board before work starts. The official lookup is the MO contractor licensing, linked on this page.

Do I need a permit for a water in MO?

Permit rules are set by the city or county, not by the state. Kansas City: Ask whether the job needs a permit and who pulls it. The office for each city is linked on its city page.

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