Best UV Water Purifiers Under $400

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.

A compact budget unit for a tight utility room, with cheap lamps. Like other budget units it tells you little about the dose.

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.

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.

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.

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.

A low cost, mercury free UV stage for a home that already filters its water. A new product with little track record, so test the water after installing it.