Does UV light treatment remove chemicals from well water?

No, UV water treatment only kills microorganisms—it does not remove chemicals, heavy metals, nitrates, or minerals from your water. UV light works by destroying the DNA of bacteria, viruses, and parasites, but it cannot filter out dissolved substances. If your well water contains chemical contaminants like arsenic, nitrates, or pesticides, you'll need additional treatment such as reverse osmosis, activated carbon filtration, or other specialized systems alongside your UV unit.

How often do UV bulbs need to be replaced?

UV bulbs should be replaced annually, regardless of whether they're still producing visible light. UV-C germicidal lamps lose their disinfection effectiveness over time—most manufacturers rate their lamps for 9,000 hours of continuous operation, which equals approximately 12 months. After one year, the lamp may still glow but typically produces only 60% of its original UV intensity, which may not be sufficient to kill all pathogens. Mark your calendar and replace the lamp every year for reliable protection.

Can I install a UV water treatment system myself?

While DIY installation is possible for handy homeowners, professional installation is recommended for most situations. UV systems require proper sizing based on your flow rate, correct placement after pre-filtration equipment, appropriate electrical connections, and precise alignment to function effectively. Improper installation can result in inadequate disinfection, leaks, or system damage. Professional installation typically costs $200-$500 beyond the equipment cost and ensures your system is properly sized and functioning correctly from day one.

What size UV system do I need for my well?

UV system sizing is based on flow rate, not well depth or home size. For whole-house protection, you need a system rated for your peak water flow, typically 10-15 gallons per minute (GPM) for average homes. A 3-bedroom home with 2 bathrooms usually needs a 10-12 GPM system. Larger homes with multiple bathrooms, irrigation systems, or high-demand appliances may need 15-20 GPM or higher. Undersizing results in inadequate contact time and reduced disinfection effectiveness. A professional can measure your actual flow rate to ensure proper sizing.

Does UV treatment work if my well water is cloudy or has iron?

UV treatment is significantly less effective in cloudy water or water with high iron content. Particles, sediment, and iron can shield microorganisms from UV light, allowing them to pass through untreated. For UV disinfection to work properly, water must have less than 1 NTU turbidity and iron levels below 0.3 mg/L. If your well water is cloudy or has visible discoloration, you must install pre-filtration (sediment filter, iron filter, or both) before the UV unit. Many UV systems include a pre-filter housing for this purpose.