Statistics · Updated October 23, 2026

Water Filter Cost Statistics: What a Gallon of Clean Water Really Costs You

Every number below comes straight from our daily water filter cost table, read October 23, 2026. Copy any line with its source in one click.

12 Water Filter Cost Facts You Can Quote

59 prices, capacity ratings and certification lines across 17 filter models were read from each brand's own page on October 23, 2026.
The median system price is $174.99 across 16 filter models.
The lowest system price is $28.99 at iSpring SF3S Shower head filter; the highest is $999.00 at Aquasana Rhino Whole house, 10-year tank.
The highest system price is 34.5 times the lowest.
The median filter price is $73.99 across 11 filter models.
The lowest filter price is $7.99 at Brita Standard (Tahoe pitcher) Pitcher, Original filter; the highest is $166.00 at Big Berkey Gravity, 2.25 gal, 2 elements.
The median rated gallons is 250 gal across 11 filter models.
The lowest rated gallons is 40 gal at Brita Standard (Tahoe pitcher) Pitcher, Original filter; the highest is 1,000,000 gal at Aquasana Rhino Whole house, 10-year tank.
The median cost per gallon of filtered water is 18.3¢ across 8 filter models (filter price divided by rated gallons).
The lowest cost per gallon of filtered water is 0.1¢ at iSpring WGB32B Whole house, 3-stage; the highest is 65¢ at Alexapure Pro Gravity, 2.5 gal, 1 filter.
3 price changes (0 up, 3 down) were logged since daily checks began on October 22, 2026.
The largest single move since October 22, 2026: Aquasana Claryum 2-Stage Under-sink 2-stage (system price) fell 50%, from $249.99 to $124.99, on October 23, 2026.

Prices read once a day from each vendor's own pricing page and compared with the previous day.
Each fact is computed from the latest snapshot and the logged change history; a median is the middle value across every row with a verified number.
The facts are recomputed every day, and the Updated date moves when one of these numbers changes.