How much does UV water treatment cost for a well?

UV water treatment systems for wells typically cost $500-$2,500 installed. Basic point-of-entry systems run $500-$1,000, mid-range systems cost $1,000-$1,800, and premium high-flow systems cost $1,500-$2,500+. Annual maintenance (bulb + sleeve replacement) adds $75-$200.

How does UV water treatment work?

UV treatment uses ultraviolet light to disinfect water. As water flows through a chamber, UV-C light at 254nm wavelength damages the DNA of bacteria, viruses, and parasites, preventing them from reproducing. The result is safe, chemical-free disinfection without changing water taste or adding anything to the water.

When do I need UV treatment for my well?

UV treatment is recommended when: bacteria tests are positive (coliform or E. coli), you want proactive protection against biological contamination, the well has history of contamination, property is in an area prone to flooding, you're buying/selling a home with private well, or you want chemical-free peace of mind.

Does UV treatment remove chemicals or minerals?

No—UV only kills or inactivates microorganisms. It does not remove chemicals, heavy metals, minerals, hardness, or improve taste/odor. UV is specifically for biological contaminants (bacteria, viruses, parasites). For other issues, additional treatment like carbon filters, softeners, or reverse osmosis is needed.

How often do UV bulbs need replacement?

UV bulbs should be replaced annually, even if still glowing. UV output decreases over time, and after 9,000-12,000 hours (about a year), effectiveness drops below safe levels. Replacement bulbs cost $50-$150. The quartz sleeve should be inspected annually and replaced every 2-3 years ($30-$75).

Does UV treatment require pre-filtration?

Yes—UV requires clear water to work effectively. Sediment, turbidity, iron, and tannins can block UV light, reducing effectiveness. Most installations include a 5-micron sediment filter before the UV unit. Water clarity should be under 1 NTU (nephelometric turbidity unit) for optimal performance.

Is UV treatment better than chlorination?

UV has advantages: no chemicals added, no taste/odor change, effective immediately. Chlorination advantages: lower equipment cost, provides residual protection, treats iron bacteria. UV is generally preferred for point-of-entry residential treatment when water quality supports it. Chlorine may be better for persistent bacterial problems.

How much electricity does UV treatment use?

UV systems use minimal electricity—typically 20-100 watts depending on size. This translates to roughly $20-$80 per year in electricity costs. The UV lamp runs continuously to ensure water is always treated when flowing through the system.