Best NSF 58 Certified Reverse Osmosis Systems

For a buyer on a budget who still wants certified RO water with minerals added back.

For a buyer who wants certified RO with mineralized water and a smart faucet for around $300.

For a household that wants a broadly certified tankless system with low running costs and a long warranty. Budget buyers can get similar output for less.

For a household that wants a certified tankless RO system with a smart faucet at a mid-range price. Its NSF 58 listing is the main reason to pick it over cheaper tankless units.

For a large household that wants the fastest flow and lowest waste, and will pay a premium for it.

For a busy kitchen that wants fast RO water and low waste from a certified system, and can pay for it.

For a household that wants fast, certified tankless RO for less than most rivals. Buyers without a spare faucet should get the brushed nickel version.

For a buyer who wants the broadest certification in a fast tankless system and doesn’t mind the price. Most households get similar output for much less elsewhere.

For buyers who want a certified tankless system with remineralization and fast flow. Running costs are high, so it suits households that value the certification over cheap filters.

For families who want a certified tank RO system with more output and a faster pour than entry models, at a low price.

For a household that wants proven, certified RO water at a low price and does not mind a tank under the sink. Filters cost little and are easy to find.

For buyers who want a certified, low-maintenance tank RO system with long-lasting filters.

For cooks and families who fill pots and pitchers often and want a faster pour from a certified tank system.

For buyers who want certified RO water with minerals added back for taste, at a low price. Choose a tankless system instead if cabinet space or wasted water matters more.

For a budget buyer who wants a certified system with cheap filters. Anyone paying for water or on a septic system should pick a lower waste design.

For a small household that wants a certified tank RO system at a low price. Larger families should look at the ROES-100.

For buyers who want a certified tank RO system with remineralization at a low price and can accept high water waste.

For a household that wants a certified, compact tank system with a filter change reminder. Families who draw a lot of water at once will outrun its small tank.

For a buyer who wants the broadest certification and mineralized water in a tank system. The running cost is high, so budget buyers should look elsewhere.