A UV purifier rated up to 12 GPM covers most homes on a single well, with two or three bathrooms in use at once. This is where the cheapest units sit, many with no stated dose, alongside smaller units from Viqua and Luminor that publish their flow at the full 40 mJ/cm² Class A dose. A unit rated at a lower dose or no dose treats less water at full strength than its headline number, so leave some margin when sizing one to the house.
Prices were last checked November 2, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Full ranking 9
- Viqua PRO10#1 of 9Full review
For a home whose well, lender or health department needs a certified Class A system. Overkill for a cabin that just wants a budget backstop.
Amazon $3,174.98$3,174.9810 GPMClass AMercury - Luminor Blackcomb LB5-151#2 of 9Full review
A well built Canadian unit with an honest 12 GPM rating at the full dose, for a typical well home. Buy the LB6 version if you want a sensor from day one.
Amazon $840.15$840.1512 GPMNoMercury - HQUA OWS-12#3 of 9Full review
A bare bones budget UV for a cabin or a well that already passes bacteria tests. Too little is published to rely on it for a known problem.
Amazon $199.99$199.9912 GPMNoMercury - Viqua VH200#4 of 9Full review
A dependable small home or cabin unit from the biggest name in residential UV, with a real controller warranty. Larger homes need the VH410 or a monitored system.
Amazon $685$6857 GPMNoMercury - HQUA TWS-12#5 of 9Full review
A compact budget unit for a tight utility room, with cheap lamps. Like other budget units it tells you little about the dose.
Amazon $259.99$259.9912 GPMNoMercury - Geekpure GP-UV55W 12 GPM#6 of 9Full review
The lowest cost way to add a UV lamp to a filtered well system, with three years of lamps included. Little is published beyond that.
Amazon $189.99$189.9912 GPMNoMercury - Bluonics 55W UV 12 GPM#7 of 9Full review
A low cost backstop for a home well that already has sediment and carbon filters. Good value, but it doesn’t measure what it delivers.
Amazon $199$19912 GPMNoMercury - iSpring UVF20 LED#8 of 9Full review
A low maintenance LED option for a modest home that already filters its well water. Too little is published to trust it as the only barrier on a contaminated well.
Amazon $309.99$309.9912 GPMNoLED - iSpring UVF55FS#9 of 9Full review
A popular budget point of entry UV for a well that already has sediment filtration. Fine as a backstop, but nothing tells you the dose is being met.
Amazon $299.90$299.9012 GPMNoMercury
