Best NSF/ANSI 55 Certified UV Water Purifiers

Last updated: November 2, 2026

UV systems independently certified to the NSF/ANSI 55 standard.

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.

Best NSF/ANSI 55 Certified UV Water Purifiers: Up to 12 GPM

  1. Viqua PRO10
    #1 of 13.4Full 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
    $3,174.98
    10 GPMClass AMercury

Best NSF/ANSI 55 Certified UV Water Purifiers: Over 12 GPM (Over 12 GPM)

  1. Viqua PRO30
    #1 of 23.6Full review

    For a farm, small business or very large home that needs certified Class A treatment at high flow. Most homes are better served by the PRO20 or smaller.

    Amazon $5,030
    $5,030
    30 GPMClass AMercury
  2. Viqua PRO20
    #2 of 23.6Full review

    The certified pick for a large home or a small business on a private well. It costs a lot, but the dose is measured and certified.

    Amazon $3,840
    $3,840
    20 GPMClass AMercury