Data

Water filter costs checked daily: what each gallon of filtered water costs you

Every price on this page comes from the brand's own store or product feed, with the date it was read. Rated capacity (gallons or months) and the certification line are quoted from the same product pages.

Cost per gallon = the replacement filter price divided by the gallons the brand rates it for. On the 2026-10-22 snapshot that is about 20 cents a gallon for a Brita Original pitcher filter ($7.99 / 40 gal), 17 cents for Brita Elite ($19.99 / 120 gal), 15 cents for an Aquasana Claryum 2-stage set ($73.99 / 500 gal), 65 cents for an Alexapure Pro gravity filter ($129.99 / 200 gal), about 3 cents for a pair of Black Berkey elements ($166 / 6,000 gal) and about 0.13 cents for an iSpring WGB32B whole-house set ($125.99 / 100,000 gal).

Whole-house systems filter every tap, toilet and shower in the house, so their per-gallon figure is not comparable with a drinking-water pitcher. Filters rated in months (most reverse osmosis sets) are listed with their price per set and the months the brand gives.

A certification line says only what the page says. "Tested to" a standard and "certified to" it are different claims, and the page keeps the brand's own word. When a price or a rating moves, the old value, the new value and the first day it appeared go into the log below, newest first.

Checked daily since October 22, 2026 · last verified October 23, 2026 ·last change October 23, 2026 · 59 prices across 17 vendors ·Follow the feed · Get notified when a price moves 5%+

Water Filter Cost statistics you can quote · Download the CSV · Change log (CSV) · Free to reuse with a link to this page (CC BY 4.0)