The 8 Best Reverse Osmosis Systems of 2021

By The Spruce
APEC Water Systems Essence Premium Quality 75 GPD pH+ Alkaline Mineral Under-Sink Reverse Osmosis Drinking Water Filter System
"Best Overall"
iSpring RCC7AK 6-Stage Under Sink Reverse Osmosis Water Filter System
"Best for Under Sink"
Home Master Artesian Full Contact Reverse Osmosis Water Filtration System with Permeate Pump TMAFC-ERP
"Best for Drinking Water"
iSpring RCC7AK-UV Reverse Osmosis Drinking Water Filtration System with UV Sterilizer
"Best for Well Water"
PureDrop 5-Stage Reverse Osmosis Water Filtration System with Pre-Filter Kit
"Best Budget"
iSpring RCS5T Tankless Reverse Osmosis Water Filter System
"Best Tankless"
RKIN Air ZIP Countertop Reverse Osmosis Water Filter
"Best for Apartments"
APEC Water Systems Ultimate Counter Top 4-Stage Reverse Osmosis Water Filtration System
"Best Countertop"