Most water treatment companies in San Diego County do not publish a price. You fill out a form, someone comes out to test your water, and the number gets decided at your kitchen table. We publish ours, so this post is mostly about what those numbers cover, what can change them, and what the systems cost to own after the install.
If you have not figured out which system you need yet, start with how hard your water actually is. Our San Diego County water hardness guide lists the numbers each water utility reports in its own annual water quality report.
How much does whole-house water treatment cost in San Diego County?
Our whole-home water softener plus filtration is $2,495 installed, equipment included. Our salt-free conditioner is $2,495 installed for the 10 GPM standard system, which covers homes up to 3 bathrooms. Homes with 4 or more bathrooms need the larger 15 GPM salt-free system, and we quote that after a walkthrough rather than guess at it.
| System | Installed price | What the price covers | Who it fits |
|---|---|---|---|
| Water softener plus filtration (combo) | $2,495 installed | 48,000-grain metered softener, triple-purpose sediment, carbon and zinc pre-filter, the equipment, installation, one year of workmanship coverage on our connections | Homes that want hardness minerals removed and have room for a drain line and an outlet |
| Salt-free conditioner | $2,495 installed — 10 GPM standard system | The conditioner, a triple-purpose pre-filter (sediment, carbon and zinc), fittings and bypass, installation | Homes up to 3 bathrooms that want scale protection without salt, a drain or power |
| Salt-free conditioner, 15 GPM | Quoted after a walkthrough | Same components, larger system | Homes with 4 or more bathrooms |
| Equipment you already bought | Written quote | Installation of customer-supplied equipment | Anyone who ordered a system online or from a store |
Prices as published on our water filtration and salt-free pages on 2026-09-21. Confirmed in writing before any work starts.
Those two systems happen to be the same price, and they are not the same product. A softener removes the calcium and magnesium from your water. A salt-free conditioner leaves them in and changes how they behave so they stop forming scale. Which one you want depends on what is bothering you, not on the price.
What is included in the installed price?
The equipment and the professional installation at your main line. The combo also carries one year of workmanship coverage on the connections we make, and the salt-free price also covers the fittings and a bypass. Either way the price is confirmed in writing before we start, so the invoice matches the quote.
On the combo, the softener tanks carry a 10-year manufacturer warranty. The valve, electronics and resin carry 5 years when the system is registered with the manufacturer within 60 days of purchase, and 1 year if it is not registered. We walk you through that registration on install day because it is the part people forget.
The resin and internal control valve parts are not covered on systems used to remove iron, manganese or chlorine above the level the system is designed for. That matters mostly for private wells, which is one more reason to test well water before recommending anything.
What can make the price go up?
Four things: installing a new softener loop where the house does not have one, drilling, a long pipe run from the main to where the system can sit, and any non-standard configuration. For salt-free, a water line run required by where your main is located is quoted separately. We quote all of these in writing first.
A pre-plumbed softener loop works the other way. Many homes built after about 2000, including much of the Temecula Valley and newer North County and East County tracts, have a pair of capped pipes in the garage waiting for a softener. When we find one, the install is faster, and we pass that on instead of pocketing it.
On the salt-free price, taxes and payment processing fees are not included. That is stated on the salt-free page and we would rather you read it here than find it on an invoice.
Want the price confirmed for your house? Call (858) 330-2881 and we will tell you what applies before anyone comes out.
How is a system sized? Does square footage matter?
Square footage does not matter. A softener is sized on water use and hardness: people in the house, times about 75 gallons each per day, times your hardness in grains per gallon. A salt-free conditioner is sized on peak flow, which tracks with bathrooms, because it has to keep up when several fixtures run at once.
| System | What we size on | Worked example |
|---|---|---|
| Water softener | People × 75 gallons per day × grains per gallon | 4 people × 75 gallons × 12.7 grains = 3,810 grains removed per day, using Poway's CY2025 reported hardness |
| Salt-free conditioner | Bathrooms and peak flow in gallons per minute | Up to 3 bathrooms: the 10 GPM standard system. 4 or more: the 15 GPM system |
The 12.7 grains per gallon figure is from the City of Poway's CY2025 water quality report. See our Poway water post for the full numbers.
The softener arithmetic tells us how many grains of hardness the system has to pull out each day, which sets how often it regenerates. A 48,000-grain softener in that example house regenerates far less often than one in a house with twice the people or twice the hardness. That is why we ask how many people live in the house, not how big it is.
A 4,000 square foot house with two people uses less water than a 1,500 square foot house with six. Anyone sizing by square footage is guessing. Our salt-free vs softener comparison goes deeper on how each system handles flow.
What does each system cost to run every year?
A salt-free conditioner's running cost is one pre-filter cartridge a year, which we put at roughly $20 to $40. A salt softener uses salt, a small amount of electricity for its control valve and water for regeneration, and we put its yearly running cost at about $190 to $240, mostly salt. Neither figure includes the purchase.
| Salt-free conditioner | Salt softener | |
|---|---|---|
| Running cost per year | About $20 to $40 | About $190 to $240 |
| Salt | None | Bagged salt, refilled every month or two |
| Drain line | Not needed | Required, for the regeneration cycle |
| 120V outlet | Not needed | Required, for the control valve |
| Sodium added to water | None | Yes, in proportion to the hardness removed |
| Water still tests hard? | Yes | No |
Running-cost ranges are the estimates on our salt-free page, not a utility figure. Salt prices and household size move them.
The softener costs more to run because it does more. It actually removes the minerals, which is what gives you the slick-feeling water and the cleaner glass. The conditioner costs less to run and asks nothing of you, but your water still tests hard afterward and does not feel different in the shower.
Why do other companies' quotes look so different?
Usually because they are quoting different things. An under-sink filter treats one tap and costs a few hundred dollars. A whole-house system treats everything after the main line. Compare whole-house against whole-house, with the same type of system, a similar flow rating, and installation included, or the comparison means nothing.
In-home sales is the other reason. When the price is set after a demonstration by someone paid on commission, the demonstration, the visit and the commission are in the number. That is a sales model, not necessarily a dishonest one, but it is expensive, and the buyer pays for it.
If you already have a written bid from a licensed contractor for a comparable whole-home system, our pricing page lists the terms of our Beat It By $50 guarantee in full.
Do you need whole-house treatment at all?
Not always. If the only complaint is chlorine or chloramine taste at the kitchen tap, an under-sink filter may be all you need. If your utility reports soft or moderately hard water, a softener may not pay for itself. Look up your utility's numbers first, and if you are on a private well, test it before buying anything.
Hard water shows up as scale on fixtures, crusted shower heads and water heaters that lose efficiency. Taste and smell come from the disinfectant your utility uses, which a softener does nothing about. Our chloramine post explains why the type of carbon matters if taste is the problem.
Private wells are a different job entirely. Iron, manganese and bacteria change what equipment makes sense, so read our East County well water post and get a lab test first.
Ready for a number you can hold us to? See what's included on our water filtration page or call (858) 330-2881. We confirm the price in writing before any work starts.