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Water Softeners & Filtration in St. Louis, MO

Compare 3 local water softeners & filtration pros. Typical service: $1448–$4587.

Top Water Softeners & Filtration Companies in St. Louis

  1. 1.Roto-Rooter Plumbing & Water Cleanup

    4.8★ (5,590 reviews)

    4.8★ from 5590 reviews

    +13149252625Website

  2. 2.Gunther Salt Company

    4.3★ (74 reviews)

    4.3★ from 74 reviews

    +13142417075Website

  3. 3.Wellness Water Filtration Systems

    +18336525011Website

Water Softeners & Filtration Cost in St. Louis

Local ranges, adjusted for area wage and cost-of-living data.

ServiceTypical range in St. Louis
Water softener, installed$1,448–$4,587/job
Installation labor only$181–$845/job

Water Softeners & Filtration prices in St. Louis run about 21% above the national average, based on what this trade earns in the metro area — so neighbouring cities in the same metro see similar rates.

Quotes on this page come from 3 companies serving St. Louis, rated 4.5★ on average across 5,664 customer reviews.

St. Louis Climate & Seasonal Timing

What St. Louis's weather means for scheduling water softeners & filtration.

Last spring frost
April 2
First fall frost
November 4
Annual precipitation
43.03"
Heating degree days
4,471
Cooling degree days
1,678
MonthLowHighPrecip
Jan23.8°39.8°2.45"
Feb27.8°45.1°2.39"
Mar37°55.4°3.36"
Apr47.3°67°4.1"
May57.4°76.8°4.8"
Jun66.7°85.3°4.34"
Jul71°89.1°4.19"
Aug69.7°88.1°3.41"
Sep61.1°80.8°3.38"
Oct49.5°68.9°3.43"
Nov39.3°55.9°4.22"
Dec28.1°42.9°2.96"

NOAA station data 1.45 miles from St. Louis.

Permits & Regulations in MO

Permit typically required

  • Missouri has no statewide plumbing license — licensing is handled by cities and counties
  • Kansas City and St. Louis each run their own plumber licensing and permitting programs
  • Pesticide work is the trade Missouri does regulate at state level, through the Department of Agriculture

License required: Local city or county plumbing license (no statewide license)

Sources: www.mo.gov

Water Softeners & Filtration FAQs for St. Louis

How much does a water softener cost in St. Louis?

A water softener in St. Louis typically runs $1448-$4587 installed, depending on capacity and type.

How many water softener companies serve St. Louis?

We track 3 water softener and filtration companies serving St. Louis.

Is water softener installation in St. Louis more expensive than average?

Plumbing labor in St. Louis runs about +20.7% versus the national average.

Does a water softener installer in MO need a license?

In MO, Missouri has no statewide plumbing license — licensing is handled by cities and counties. Tying a softener into a St. Louis homes main water line is plumbing work.

How do I know if I need a water softener in St. Louis?

Scale on fixtures and spotty dishes are the signs; ask a St. Louis dealer for a free hardness test before paying $1448-$4587.

Salt-based or salt-free softener in St. Louis?

Salt-based units actually remove hardness; salt-free conditioners only reduce scale. St. Louis dealers sell both, so ask which one the quote is for.

How many quotes should I get for a water softener in St. Louis?

Two or three; with 3 companies serving St. Louis, compare grain capacity and the cost of ongoing salt and service.

Do water softeners use much water in St. Louis?

Regeneration uses some water; with 43.03 inches of rain a year in St. Louis, check whether your utility restricts softener discharge.