Water softener.
Takes the hardness minerals out of all the water in the house. Stops scale and spots. Does not filter chlorine, lead or anything else.
Hard water inResin holds the mineralsSoft water out
Softer, cleaner water for Wentzville homes.
Water softeners, whole-house filtration and drinking water systems across St. Charles County. We test your water first and recommend only what you need.
How hard is the water here?
- Wentzville (city wells)17.3 gpg
- O'Fallon (city system)7.2 to 16.5 gpg
- PWSD 28.3 to 10.8 gpg
- St. Peters10.1 gpg
- St. Charles (city)8.9 gpg
- Missouri American Waterabout 5 to 7 gpg calculated
Grains per gallon. Over 7 is hard. Over 10.5 is very hard.
Hard water is a nuisance, not a danger
Hard water is safe to drink. It is just full of calcium and magnesium, and those minerals are rough on a house.
Scale.
A white crust builds up inside the water heater, on faucets and on shower glass.
Soap that will not lather.
You use more soap, shampoo and detergent to get the same clean.
Spots and film.
Dishes, glasses and fixtures dry with a chalky film.
A softener fixes those three things. It does not filter your water. Different problems need different equipment, so we start with a test.
Softening, filtration and drinking water, in plain words
We do three kinds of water treatment. Most homes need one or two of them, and some need none.
Reverse osmosis drinking water.
A filter under the kitchen sink with its own small faucet. Makes clean-tasting water for drinking and cooking. Treats one tap, not the whole house.
Whole-house water filtration.
A carbon filter tank on the main water line that takes out the chlorine taste and smell at every tap. Does not soften water.
How hard is the water here?
It depends on who supplies your street. These numbers come from each utility's own 2025 water quality report.
Most city water in St. Charles County is hard or very hard
Hardness in grains per gallon, from each utility's 2025 water quality report
- Soft, 0 to 3.5
- Moderately hard, 3.5 to 7
- Hard, 7 to 10.5
- Very hard, over 10.5
- Wentzville (city wells)17.3 gpg
- O'Fallon (city system)7.2 to 16.5 gpg
- PWSD 28.3 to 10.8 gpg
- St. Peters10.1 gpg
- St. Charles (city)8.9 gpg
- Missouri American Waterabout 5 to 7 gpg calculated
Sources: City of Wentzville 2025 water quality report, City of O'Fallon 2025 water quality report, PWSD 2 2025 water quality report, City of St. Peters 2025 water quality report, City of St. Charles 2025 water quality report and Missouri American Water 2025 water quality report.
Find your town:
How it works
Book a test.
Call or text. We set a time that suits you.
We test at your tap.
We measure hardness and chlorine at your kitchen sink and show you the results on the spot.
You get a written recommendation.
It lists the equipment, the price, and what each part does and does not do. Sometimes the right answer is to do nothing.
A licensed plumber installs it.
Then we show you how to run it.
What we will not do
No scare tactics.
Every utility we checked in this county reported no health-based violations in its 2025 water quality report. We sell better water, not fear.
No pressure at your kitchen table.
You get three business days to change your mind on any order, in writing. We order your equipment after that.
No claims we cannot back up.
If a product is not certified for something, we will not say it does it.
No selling you what you do not need.
If your water is fine as it is, we will tell you.
Common questions
How hard is the water in Wentzville?
Wentzville's city wells tested at 17.3 grains per gallon in the city's 2025 water quality report, which the U.S. Geological Survey classes as very hard. Water the city buys from PWSD 2 runs 8.3 to 10.8 grains per gallon. Your number depends on which source feeds your street.
Do I need a water softener?
If your water is above about 7 grains per gallon and you are tired of scale, spots and soap that will not lather, a softener will fix that. Below 7 grains per gallon, many homes do fine without one. A test tells you which side you are on.
Is hard water bad for you?
No. Hard water is safe to drink. The minerals in it are calcium and magnesium. The trouble is what they do to water heaters, fixtures, glass and laundry.
Do you work on well water?
Not yet. We are starting with homes on city water in St. Charles County. Wells need different testing and equipment, and we want to do that properly before we offer it.
How much does a system cost?
It depends on your water and your plumbing, so we give you a written price after the test. The test is free and you are under no obligation.
Find out how hard your water is.
The test is free, it takes place at your kitchen sink, and you see the numbers yourself.