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Water Treatment

How Much Does a UV Water Filtration System Cost in 2025?

Average Cost:

$200 - $2,500

On average, it costs $200 to $2,500 to install a UV water filtration system in your home. Most homeowners spend $500 to $1,500, plus an additional $300 to $1,000 for professional installation. Homeowners can also expect to pay for regular maintenance such as bulb replacement and system cleaning in addition to these costs.

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Updated: Nov 18, 2025 · Written By: Rihonna Scoggins · Reviewed By: Isabella Andersen

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  1. How Much Does a UV Water Filtration System Cost?
  2. How Does a UV Water Filtration System Work?
  3. What Factors Affect the Cost of a UV Water Filtration System?
  4. UV Water Filtration System Costs by Unit
  5. Additional Installation and Maintenance Fees
  6. Where Can Homeowners Buy UV Water Filtration Systems?
  7. Is Professional UV Installation Worth the Cost?

How Much Does a UV Water Filtration System Cost?

The cost of a UV water filtration system generally ranges from just $200 for an under-sink model to $2,500 for a whole-house UV system. Note: This price is for the unit only; expect to pay an extra $300 to $1,000 for professional installation.

This guide breaks down the total costs associated with UV water filtration systems, including factors that impact pricing, installation considerations, and ongoing maintenance fees for homeowners.

UV water filtration system costs

How Does a UV Water Filtration System Work?

UV water filtration systems use ultraviolet light to neutralize harmful microorganisms in your water, making it safe for drinking and other household uses. Unlike chemical treatments, UV filtration is chemical-free and eco-friendly, which preserves the natural taste and quality of your water.

Common Uses for UV Water Systems

  • Residential Homes: Ideal for homeowners looking to guarantee safe drinking water and whole-house purification.
  • Well Water Treatment: Essential for effectively treating well water sourced from private wells where bacterial contamination is common.
  • Commercial Applications: Used in businesses requiring high-capacity water purification.

Here’s a quick look at the UV water purification process:

Infographic illustrating the stages of the UV water purification process

UV water filtration systems are particularly beneficial in local areas where water quality is inconsistent or when additional purification is needed to ensure safe consumption. For more information on home water treatment, see Modernize’s guide to types of water treatment systems.

What Factors Affect the Cost of a UV Water Filtration System?

Several factors determine the total cost of a UV water filtration system. Understanding these helps homeowners choose the right system for their budget.

1. System Type and Coverage (Whole-House vs. Under-Sink)

  • Under-Sink Models: This is the lower-cost option, suitable for small households or purifying water for a single faucet, such as in the kitchen.
  • Whole-House UV Systems: This option has a higher price tag due to increased capacity, higher flow rate, and the need to treat all water entering the home.

2. Flow Rate and Capacity

Larger UV systems designed to handle higher water volumes (measured in GPM, gallons per minute) cost more. If your family uses a lot of water daily or runs multiple showers and appliances at once, you will need a high-capacity, more powerful UV system.

3. Brand and Quality

Premium UV filtration brands often use higher-quality materials, include advanced digital features, and offer longer, better warranties. While these systems may cost more upfront, they generally offer better long-term value by reducing maintenance and replacement frequency.

4. Installation Requirements

The complexity of the installation affects the final price. Systems that require extensive custom plumbing or dedicated electrical work for proper setup will incur higher installation costs. Complex whole-house systems should always be handled by professional, local plumbers.

UV Water Filtration System Costs by Unit

The cost of the UV unit itself varies significantly based on its size and filtering capability:

Under-Sink UV Systems (Unit Only)

  • Typical Cost: $200 to $800
  • These systems are for small-scale filtration, providing purified drinking water for one point of use. They’re ideal for individuals focused only on kitchen drinking water safety.

Whole-House UV Systems (Unit Only)

  • Typical Cost: $900 to $2,500
  • These systems treat all water entering your home, ensuring clean, safe water at every faucet. They are necessary for homes with well water or multiple bathrooms.

Annual Replacement Parts

  • Cost: $50 to $200 annually
  • To keep your system working, you must regularly replace parts like the UV bulb, quartz sleeve, and pre-filters.

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Additional Installation and Maintenance Fees

Beyond the cost of the unit, homeowners must budget for professional labor and ongoing maintenance.

Professional Installation

  • Cost: $300 to $1,000
    Hiring a professional ensures correct plumbing, optimal system performance, and warranty compliance. A local plumber can also handle any necessary electrical adjustments and pipe modifications.

Annual Maintenance

  • Cost: $100 to $300 annually
    Maintenance includes the cost of regular UV bulb replacements, cleaning the system, and performance checks. Proper maintenance extends the system’s lifespan and guarantees ongoing water safety.

mother helping little child to wash hands over a white sink

Where Can Homeowners Buy UV Water Filtration Systems?

UV water filtration systems are widely available from several types of retailers:

  • Online Stores: Websites like Amazon and major home improvement store sites offer a wide selection, often suitable for DIY installation.
  • Specialized Suppliers: Purchase direct from brands for professional-grade systems and technical support.
  • Local Home Improvement Stores: Buying in-store provides convenience and the option to consult with local staff, which is helpful for homeowners who want to see the products in person.

Is Professional UV Installation Worth the Cost?

For most homeowners, especially those installing a whole-house unit, professional installation is recommended.

Benefits of Professional Installation

  • Ensures proper functionality and peak water purification performance.
  • Includes labor warranties for peace of mind.
  • Provides expert knowledge to address complex plumbing or electrical issues that can arise with whole-house UV systems.

When to DIY

If you are skilled with basic plumbing and electrical work, you can save money by installing an under-sink model yourself. However, whole-house UV systems almost always require a professional to ensure safety, performance, and warranty compliance.

UV water filtration systems offer a reliable and eco-friendly way to ensure safe drinking water for your home. Costs range from $200 to $2,500 for the unit, plus installation fees. By understanding the cost factors and choosing the right local professional, you can make the best long-term choice for your home’s water quality.

Explore Modernize’s Water Filtration Cost Guide to learn more and easily find reliable, local contractors who specialize in water filtration system installation.

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Read real homeowner reviews, explore qualifications, and view promotions. Modernize makes it easy to browse professionals and find one that will be perfect for your project.

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FAQs About UV Water Systems

What is a UV water filtration system, and how does it work?

A UV water filtration system uses ultraviolet light to destroy bacteria, viruses, and other harmful microorganisms in water. The UV light disrupts the DNA of these microorganisms, rendering them inactive and ensuring the water is safe for drinking and household use.


How much does it cost to install a UV water filtration system?

  • Under-Sink Systems: $200 to $800 for smaller-scale filtration at a single faucet.

  • Whole-House Systems: $900 to $2,500 for treating water throughout the home.

  • Professional Installation: $300 to $1,000, depending on system complexity and required plumbing or electrical work.


For more details, visit Modernize’s Water Filtration Cost Guide.


How often do UV bulbs need to be replaced?

UV bulbs typically need to be replaced every 12 months to maintain optimal performance. Replacement costs range from $50 to $200 annually, depending on the system and bulb type.


Is a UV water filtration system enough for well water?

A UV water filtration system is highly effective for disinfecting well water, but it may need to be paired with other filtration methods, such as sediment filters or water softeners, to remove impurities like debris, minerals, or heavy metals. For more on water treatment options, visit Modernize’s Reverse Osmosis Cost Guide.


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