Water Treatment Answers is a free service that connects homeowners with local water treatment and filtration companies. We are not a water-treatment company or installer, and we do not perform the work ourselves.
There's no single price. A whole-house filter usually runs about $1,000 to $3,300 installed, a water softener about $1,000 to $3,000, and an under-sink reverse-osmosis unit about $300 to $950. Whole-house reverse osmosis is the priciest, roughly $4,800 to $8,000. Your water test and plumbing set the final figure.
Estimate your own numbers with the water softener sizing and filter replacement cost calculators.
| System | Typical installed cost |
|---|---|
| Whole-house filter (sediment + carbon) | $1,000–$3,300 |
| Water softener (salt-based) | $1,000–$3,000 |
| Salt-free water conditioner | $1,500–$4,500 |
| Under-sink reverse osmosis | $300–$950 |
| Whole-house reverse osmosis | $4,800–$8,000 |
Tell us what's wrong with your water, we'll match you with a local company, free and with no obligation.
