Best NSF Certified Water Softeners

A certified demand softener for one to four people that also reduces barium and radium, a plus on some well water.

A low-cost, NSF certified demand softener for a small household on city water, with excellent salt efficiency.

A compact, certified demand softener for one to four people, though the same design costs less under other brands.

A compact, certified softener for a small home or a well with some iron, where space matters more than capacity.

A strong all-round pick for larger families on hard city or well water: high flow, certified efficiency and a longer parts warranty for the price.

A well rounded certified softener for a family of up to six on hard city or well water.

A certified, salt efficient cabinet softener for a family of up to five on city water. Pick it over cheaper uncertified units if you want verified salt savings.

A good value 40,000 grain softener for a family of three to five, with certified salt efficiency and strong iron handling.

A certified 40,000 grain demand softener for well or city water, but the price is hard to justify against similar models.

A certified, salt efficient softener for a large household with very hard water that does not need high flow. Homes with many bathrooms in use at once should look for more flow.