Water Filtration & Softener Installation
Much of Southern California has hard water. Here is how softeners and filtration systems differ, what they help with, and what they typically cost to install.
Signs of Hard Water
Hard water is a silent problem. You might not notice these signs at first, but they add up over time.
White Scale on Fixtures
Chalky white buildup on faucets, showerheads, and aerators
Spots on Dishes
Hard water stains and spots on dishes and glassware after washing
Water Heater Issues
Heater is inefficient or failing faster than normal
Dry Skin and Hair
Soap doesn't lather well and leaves residue on skin and hair
Stiff Laundry
Clothes feel stiff and wear out faster after washing
Bad Taste or Chlorine Smell
Water tastes off or has a strong chemical or mineral taste
Water Treatment Systems
Each system solves different water quality problems. Choose based on your specific needs.
Whole-House Water Softener
$1,500-$3,500
Best for: Hard water
Removes hardness minerals like calcium and magnesium using ion exchange. Needs regular salt refills.
Whole-House Filtration System
$2,000-$5,000
Best for: Taste and chlorine
Reduces chlorine and sediment and improves taste and odor throughout the house. Does not soften water.
Reverse Osmosis System
$500-$2,000
Best for: Drinking water
Under-sink units treat drinking and cooking water at one faucet. Whole-house systems cost more.
Under-Sink Filter
$200-$500
Best for: Better-tasting tap water
A point-of-use filter at the kitchen or bathroom sink. Choose one certified for the contaminants on your water quality report.
The Cost of Doing Nothing
Hard water mineral deposits accumulate inside your pipes over time. They narrow the pipes, reducing water flow and forcing your water heater to work harder to maintain temperature.
A softener can reduce scale in water heaters, fixtures, and appliances. Whether it is worth the cost depends on how hard your water is, so check your water utility's annual water quality report first. If you are planning a full repipe, ask the plumber whether treatment makes sense for your water.
Before You Buy a System
Use a Licensed Installer
Check the installer's license at cslb.ca.gov and ask for proof of insurance.
Ask About Upkeep
Softeners need salt and filters need replacing. Ask what yearly maintenance costs before you buy.
Know Your Water First
Your water utility publishes an annual water quality report with hardness and contaminant levels.
What Does Water Filtration & Softener Cost?
Typical price ranges for water filtration & softener in Los Angeles County and Orange County. Actual cost depends on scope, access, and the condition of your existing plumbing.
| Type of work | Typical range |
|---|---|
| Under-Sink Filter InstallationInstall a point-of-use water filter under a kitchen or bathroom sink | $200 to $500 |
| Whole-House Water SoftenerInstall a whole-house water softener system to reduce hard water scale | $1,500 to $3,500 |
| Whole-House Filtration SystemInstall a comprehensive whole-house water filtration system | $2,000 to $5,000 |
| Reverse Osmosis SystemInstall an under-sink or whole-house reverse osmosis filtration system | $500 to $2,000 |
After hours. Water filtration is always scheduled, not emergency-rate
Permits. Whole-house systems may require a plumbing permit depending on the city
Water treatment costs depend on system type, capacity, and installation complexity. Much of Southern California has hard water, which makes water softeners a common investment.
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