Well water filtration system cost: $895–$3,495 for equipment
Well water treatment equipment costs $895–$3,495 per system on supplier Mid Atlantic Water's 2026 prices, from a UV light at the low end to an iron filter at the top. A plumber adds about $800 to install it. Whole-house arsenic systems cost more: $2,400–$12,000 on Ohio's health department estimates.
1,Key figures
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Equipment cost by system
| System | Equipment | Treats |
|---|---|---|
| UV light | $895–$995 | Bacteria |
| Whole-house carbon filter | $1,495–$2,495 | Taste, odor, trace hydrogen sulfide |
| Water softener | $1,495–$2,495 | Hardness, some iron |
| Iron filter | $2,495–$3,495 | Iron, manganese, hydrogen sulfide |
| Whole-house arsenic media (2012) | $2,400–$4,500 | Arsenic |
| Whole-house reverse osmosis (2012) | $5,000–$12,000 | Arsenic, nitrate, dissolved solids |
The first four rows are Mid Atlantic Water's 2026 equipment prices, without installation. The last two are Ohio Department of Health estimates from 2012 for arsenic systems.
Installation
Mid Atlantic Water says a licensed plumber typically charges about $800 to install a treatment system, in a range of $500–$1,200 and two to three hours, and about an hour for a UV light alone. Drain tubing and fittings are not in the equipment price.
Sources1
Dealer quotes run higher
The same supplier reports that dealers who come to the house quote $5,000–$15,000 installed, and $7,000–$15,000 for two or more systems. Those figures come from its callers and are not verified. They are a reason to get the equipment priced separately from the installation.
Sources1
Test before you buy
Each system treats specific problems, and none treats all of them. Ohio's health department notes that softeners, activated carbon and sediment filters do not remove arsenic. Nebraska Extension says carbon filters and standard softeners do not remove nitrate. A lab test tells you what you are treating.
Common questions
What is the cheapest well water treatment?
On Mid Atlantic Water's prices, a UV light at $895–$995 for bacteria. For one tap, Ohio's health department put point-of-use arsenic media at $300–$700 in 2012.
Do I need a whole-house system?
Not always. For arsenic, Ohio's health department lists point-of-use systems at the kitchen tap as an option alongside whole-house treatment.
For the cost of a finished well in your state, see the national well cost figures.
Sources
- Whole house water filter system cost: what you'll actually pay in 2026 , Mid Atlantic Water (online supplier). Accessed November 9, 2026. Prices dated October 2, 2026; updated November 5, 2026
- Arsenic Treatment and Removal for Private Water System Wells , Ohio Department of Health, Bureau of Environmental Health. Accessed November 9, 2026. June 2012 (cost estimates are 2012-era)
- Nitrate in Drinking Water , University of Nebraska-Lincoln (Nebraska Extension), Becky Schuerman. Accessed November 9, 2026. September 9, 2020
How these figures are built: methodology. Updated November 2026.