# What a Well Water Treatment System Costs: Full Train

> A full well water system runs $3,000 - $8,000 installed. See stage-by-stage pricing, three example builds, and the ten-year running cost.

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Last updated: 2026-11-09

A complete well water treatment system costs $3,000 - $8,000 installed, depending on how many stages the lab report requires. A sediment and softener train lands near $2,000 - $4,000, and a full train with iron, carbon, and UV reaches $8,000.

## Stage-by-Stage Pricing

| Stage | Installed cost | What it removes |
|---|---|---|
| Sediment filter | $150 - $600 | Sand, grit, rust particles |
| Iron filter | $800 - $2,500 | Dissolved iron, manganese |
| Sulfur filter | $1,000 - $3,000 | Hydrogen sulfide odor |
| Softener | $1,200 - $4,500 | Calcium, magnesium |
| Carbon filter | $500 - $1,800 | Chlorine, taste, odor |
| UV purifier | $400 - $1,200 | Bacteria, viruses |
| Point-of-use RO | $300 - $900 | Dissolved solids at one tap |

Those are typical installed ranges, not quotes. Each stage's price depends on size, flow, and site conditions.

The order is fixed by function: sediment first, iron and sulfur before the softener, carbon after the backwashing stages, UV last.

## Example One: Hard Water Only

A well at 14 GPG with no iron and no bacteria needs a sediment prefilter and a softener.

Sediment filter at $400 plus softener at $2,200 equals $2,600 installed.

Annual cost: $250 in salt, $40 in cartridges, and a $400 rebed around year ten.

## Example Two: Hard Water and Iron

Iron at 4 PPM and hardness at 12 GPG needs an iron filter ahead of the softener.

Iron filter at $1,800 plus softener at $2,200 plus sediment at $400 equals $4,400 installed.

Annual cost: $250 in salt, $60 in cartridges, and $300 every five years in iron media.

## Example Three: Full Train

Iron at 5 PPM, sulfur odor, hardness at 15 GPG, and a positive bacteria test need four stages plus UV.

Iron and sulfur filter at $2,600 plus softener at $2,200 plus carbon at $900 plus UV at $800 plus sediment at $400 equals $6,900 installed.

Annual cost: $300 in salt, $150 in cartridges and carbon, $60 for a UV lamp, and $400 every five years in media.

## Ten-Year Arithmetic

Example one: $2,600 + ($290 × 10) + $400 rebed = $5,900.

Example two: $4,400 + ($310 × 10) + $600 media = $8,100.

Example three: $6,900 + ($510 × 10) + $800 media = $12,800.

The running costs are 50 - 60 percent of the ten-year total, which is why the design should avoid stages the water does not need.

## What Drives the Price

The lab report is the first driver. Each contaminant above its threshold adds a stage and $500 - $2,500.

The flow rate is the second. A 5 GPM cabin needs smaller equipment than a 15 GPM house, and the price difference is 30 - 50 percent.

The site is the third. A utility room with a drain and power is a straightforward install; a crawl space adds labor and may rule out backwashing equipment.

## Steps to Budget

1. Test the water for hardness, iron, manganese, sulfur, bacteria, and nitrate.
2. List the contaminants above their thresholds.
3. Match each one to a stage.
4. Get three itemized quotes with the model numbers.
5. Confirm the drain and power requirements for each stage.
6. Ask for media and cartridge prices.
7. Compare ten-year totals, not installed prices.

## What the Price Does Not Include

The well pump and pressure tank, which are separate equipment at $900 - $3,000 installed for a pump.

Well repair, if the casing or screen is compromised. That can run $2,000 - $10,000 and comes before treatment.

A water test at $40 - $150, which should precede the design.

Permits and electrical work, which vary by jurisdiction and add $150 - $600.

Combine iron and sulfur treatment in one tank when both are present. That saves $800 - $1,500 against two separate units.

Use a cartridge carbon filter instead of a backwashing tank if the flow is modest. That saves $500 - $1,000.

Skip UV if the bacteria test is negative and the wellhead is sound. Add it only if a test shows contamination or the casing cannot be repaired.

Do not skip the sediment prefilter. It protects every stage behind it and costs $150 - $600.

Do not size the softener below the calculated load. Undersizing leads to hard water at the end of each cycle and a replacement sooner.

Do not buy a package before testing. A package fitted to the water is cheaper than a package fitted to a sales pitch.

Savings come from combining stages. One tank that handles both iron and sulfur saves $800 - $1,500 against two separate units, a cartridge carbon filter instead of a backwashing tank saves $500 - $1,000 at modest flow, and skipping UV when the bacteria test is negative saves $400 - $1,200 without compromising the design.

The places not to save are the sediment prefilter, the softener sizing, and the test itself. A missing prefilter costs more in media replacement than it saves, an undersized softener fails before its time, and a package bought before testing usually includes one stage the water does not need and misses one it does.

One final number for the budget: a full train adds roughly 10 - 15 PSI of pressure drop across its stages. If the house pressure is marginal, a booster pump at $400 - $900 may be needed, and that belongs in the quote rather than in the surprise column.

For the stage-by-stage guide, see [well water purification system](https://watertreatmentpro.com/well-water-purification-system/). For the treatment decision, see [well water treatment](https://watertreatmentpro.com/well-water-treatment/). For the annual costs, see [well water treatment cost](https://watertreatmentpro.com/well-water-treatment-cost/).