Whole house water filtration systems can vary widely in cost. A whole house reverse osmosis system can start at $750 for a small house and go all the way up to $7,500.

Most whole-house water filtration systems cost between $500 and $3,000 as of publishing, but large or high-tech models can run as high as $10,000 or more.

These are the three best whole house water filtration systems available on Amazon for every kind of budget. The Best Under-$100 Option Cullligan WH-HD200-C Whole House Sediment Water Filter ...