Not all filters are born equal. A cartridge filter is the couch potato of the family. Cheap to buy ($200), but the cartridges cost $50 a pop. Change them every six months, or watch your water pressure turn into a sad trickle.
Whole House Water Filter Costs for 2026-2026
Then there’s the backwashing filter. This is the overachiever. It cleans itself by flushing water backward. It costs $1,200 to $2,500 upfront, but it uses less electricity and lasts longer. It’s the Prius of water filtration.
And the reverse osmosis system? That’s the drama queen. It removes everything—even good minerals. You’ll pay $2,000 to $4,000 for the whole house version. Plus, it wastes a few gallons of water for every one it cleans. Your plants will judge you.
