914 Water Filtration & Treatment Cost in Westchester, NY
Short answer
We did not find a published Westchester-specific price list, so these are national HomeGuide ranges: $850 to $5,400 installed for a whole-house filtration system, $800 to $4,000 for a well-water filtration system, and $1,200 to $3,800 for a salt-based water softener with installation. Water testing is $100 to $300. Your final price depends on what your water test finds.
Published cost ranges
| Item | Range | Source |
|---|---|---|
| Whole-house filtration system, installed (national) | $850 to $5,400 | HomeGuide |
| Well-water filtration system, installed (national) | $800 to $4,000 | HomeGuide |
| Carbon, mineral and sediment filters, whole house (national) | $850 to $1,400 | HomeGuide |
| Whole-house filters plus UV (national) | $1,850 to $2,900 | HomeGuide |
| Whole-house filters, UV and softener (national) | $2,650 to $5,400 | HomeGuide |
| Whole-house reverse osmosis, installed (national) | $4,800 to $8,000 | HomeGuide |
| Under-sink filtration, installed (national) | $170 to $580 | HomeGuide |
| UV disinfection, under-sink to whole-house (national) | $350 to $1,500 | HomeGuide |
| Chemical injector, whole house (national) | $500 to $1,500 | HomeGuide |
| Annual replacement filters, whole house (national) | $150 to $250 | HomeGuide |
| Water testing (national) | $100 to $300 | HomeGuide |
| Salt-based water softener, installed (national) | $1,200 to $3,800 | HomeGuide |
| Dual-tank softener, installed (national) | $1,700 to $5,000 | HomeGuide |
| Salt-free system, installed (national) | $1,500 to $4,500 | HomeGuide |
| Softener salt or potassium, per year (national) | $50 to $150 | HomeGuide |
These are published estimates retrieved October 2026, not quotes from 914 Basement. Your price depends on your house.
Prices on this page are national averages from HomeGuide, not Westchester surveys, and may be lower than Westchester quotes.
What drives the price
- What your water test finds: hardness, iron, bacteria, nitrate, radon or other contaminants
- Whole-house vs. point-of-use treatment
- Household size and water use, which set softener and filter capacity
- Drain, electrical outlet and plumbing changes at the install location
- Ongoing filter, salt and service costs
- Whether a licensed plumber is needed for the connections
Frequently asked questions
Do I need a test before I buy a system?
Yes. The CDC says no single treatment protects against all problems, so make sure a system removes the specific germ or chemical you are concerned about. HomeGuide suggests testing to decide what to install.
Is a softener the same as a filter?
No. HomeGuide says softeners treat hard water but do not filter it, so they are often one part of a larger system.
Why only national prices?
We could not find a Westchester-specific published price list for water treatment. We will add one when we do.
Sources
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