How Much Does a UV Water Treatment System Cost? (2026 Price Guide)

A UV light for a well costs about $1,190 in equipment from us: the $995 VIQUA VH410 and the $195 sediment filter VIQUA requires in front of it. A licensed plumber needs about an hour to put the UV light in. From the second year on, it costs about $375 to $430 a year to run: a $170 lamp once a year, about $95 of electricity, and two or three $55 sediment cartridges.

Over 10 years, the VH410 costs about $3,475 with its lamps and power, and the sediment filter adds about $1,240 to $1,790. The equipment price goes up when your water test shows something VIQUA says has to come out first, like hardness over 7 grains or iron over 0.3 ppm. Every price on this page is our current price, with free shipping to the lower 48 states.

What the UV light itself costs

The UV light itself is $995 for the VIQUA VH410 and $895 for the VIQUA VH200. For a house on a well I recommend the VH410. It treats 18 gallons a minute at VIQUA's standard dose, twice the VH200. The VH200 is for a spot where the longer VH410 will not fit. How to choose between them is in my guide to which UV light to buy.

Cheaper whole-house UV lights are sold online. On October 3, 2026, Aquasure listed its 12 gallon a minute AS-UV12S at $249.99 and iSpring its 12 gallon a minute UVF55FS at $338.99 on their own sites, and neither page gave the UV dose its flow is rated at. How ours compare is in VIQUA VH410 vs other UV brands.

The sediment filter you also need

VIQUA's manual says a 5 micron sediment filter must go in ahead of the UV light. So it is part of the cost. Our 20 inch Big Blue sediment filter kit is $195 and comes with one 5 micron cartridge. The 10 inch kit, $165, is enough for one or two people. If a 5 micron cartridge filter is already in the line ahead of where the UV light will go, you do not need a second one.

The cartridge is the cost that keeps coming: $55 for the 20 inch cartridge and $45 for the 10 inch, about every 4 to 6 months on a typical well. A clean well can go 12 months; a dirty one may need a new cartridge every other month. We usually recommend the 20 inch because it doesn't slow your flow, and it holds more dirt between changes.

What a plumber charges to install a UV

We ship the UV light to you and do not install it; we recommend a licensed plumber, and I support your plumber by phone at 800-460-5810. For the UV light alone, it shouldn't take a plumber, a decent plumber, any more than an hour to put it in. It mounts on the wall, and the plumber plumbs into the unit and out of it, back to the house line.

What that hour costs depends on your plumber's rates. For a national picture, Modernize puts whole-house UV installation at $300 to $1,500, and HomeGuide puts a UV system at $700 to $2,500 installed, equipment included. Three things add to the plumber's bill:

• No outlet near the well tank. VIQUA requires an outlet with GFCI protection, which you supply. HomeGuide puts electrical work for a UV light at $100 to $400.
• The pipe on the outlet side. VIQUA calls for metal fittings and at least 10 inches of copper pipe on the outlet.
• More equipment in the same visit. A sediment filter, a couple of tanks and the UV light together is more like 3 to 4 hours. For two tanks, I tell callers they shouldn't have to pay more than $700 to $1,000 for the installation.

What your plumber needs to know about mounting, the room at the lamp end and start-up is in the installation section of my complete guide to UV water disinfection.

The yearly cost to run a UV light

After the first year, a VH410 costs about $375 to $430 a year to run: the lamp, the electricity and the sediment cartridges. The first lamp comes in the box, so lamps start in year 2.

The electricity is my arithmetic: VIQUA's wattage running all day, every day, at 18.31 cents a kilowatt-hour, the average U.S. home electricity price the EIA reported for July 2026. That is about $8 a month for the VH410 and under $5 a month for the VH200; your own rate moves it up or down.

The lamp is rated for about 9,000 hours, and VIQUA says to replace it once a year. The controller counts down the days, and when it reaches zero it beeps; you can put the beep off a week at a time, up to 4 times, while the new lamp ships. Turn the power off, shut off the water and release the pressure before you change it, as VIQUA's manual says. One buyer who bought the VH200 lamp wrote in December 2023: "Be sure to fully tighten the clear tube before turning on the water and check for leaks." Verified buyer

The quartz sleeve is the glass tube the lamp sits in. VIQUA gives no replacement schedule for it. Minerals slowly coat it and cut the UV light that reaches the water, so it gets cleaned now and then; I tell callers to use vinegar. It is replaced only if it will not come clean, or if it is scratched or cracked. The controller carries VIQUA's 3-year warranty, so a $345 controller is a cost only if it fails after that.

What a UV light costs over 10 years

Over 10 years, the lamps cost more than the UV light itself: nine VH410 lamps are $1,530, and the unit is $995.

The sediment line is the $195 kit plus 19 to 29 more $55 cartridges, one every 4 to 6 months. A new sleeve or controller, if you ever need one, and the plumber come on top of these totals.

When the water needs more than a UV

A UV light kills bacteria, but it does not take anything out of the water. So anything over VIQUA's limits needs its own equipment first. These are the limits from VIQUA's manual for the water going into the UV light:

In April I told a caller with iron and manganese to "put a UV light after the iron filter 'cause you got to take all the iron out and all the manganese out before." The UV light goes last: after the pressure tank, the sediment filter and any iron filter or softener. The whole line is in the correct order for well water treatment systems.

No test yet? Our $199 well water test covers bacteria (E. coli and total coliform) plus hardness, iron, manganese and turbidity. It does not test for tannins.

Water test in hand?

Send me your test before you buy

Text me a photo of your lab report. I'll tell you whether a UV light and a sediment filter will do, or what has to go in first.

Text Aidan443-277-2204 Call800-460-5810Aidan

8 AM to 5 PM Eastern, seven days a week. A real person, not a call center.

What dealers quote for a UV light

The installed quotes callers read me for systems with a UV light ran from $4,100 to $15,000 this year. Here is what comparable equipment costs from us, shipped, before the plumber.

The first quote was $15 more than the parts cost from us, with the install included. Our prices do not include the plumber; a dealer's do, and a dealer also services what it puts in, which is the real difference. Steve Carroll, a verified buyer of our Water Sanitizer package, wrote in March 2020: "Had it installed by local plumber. Working awesome and our water is free of coliform and every other bacteria. Saved hundreds over Home Depot, Lowes and the local plumbing houses" Verified buyer

Is a UV light worth the cost

If your well test came back positive for coliform or E. coli, a UV light is the fix I recommend. What I tell callers is simple: "If it's positive for coliform, you should install a UV light." A small house is not a reason to skip it. When a caller with a one-bath house asked whether the VH410 was overkill, I said, "No. Not with bacteria. It's never overkill."

Shocking the well with chlorine does not last: "You can chlorinate the well, but usually it comes back." How to shock a well, and what a positive test means, is in my guide to removing coliform bacteria from well water. If your test came back clean for bacteria, the question of whether every well needs UV disinfection has its own page.

On city water, start with your utility's water quality report, which EPA calls the Consumer Confidence Report. Public water is regulated under the Safe Drinking Water Act; a private well is not, and EPA says private well owners are responsible for the safety of their own water.

Frequently asked questions