Water Quality Rank

The best under-sink and faucet water filters

Updated October 7, 2026 · Scores from third-party lab reports · How we score

The best under-sink water filter is Aquasana SmartFlow Reverse Osmosis (97/100), followed by AO Smith High-Efficiency Reverse Osmosis (97/100), Epic Smart Shield (91/100) and Tyent UCE-13 PLUS (83/100). We ranked 36 sink and faucet filters.

Top 25 ranked

#1
Aquasana SmartFlow Reverse Osmosis
Aquasana
Sink filter · Activated Carbon, Reverse Osmosis, Remineralization · Certified: NSF · Lab tested
Strong: verified contaminant removal, lab data indexed, certified by a recognized body.
97
#2
AO Smith High-Efficiency Reverse Osmosis
AO Smith
Sink filter · Reverse Osmosis, Activated Carbon, Catalytic carbon · Certified: WQA · Lab tested
Strong: verified contaminant removal, lab data indexed, certified by a recognized body.
97
#3
Epic Smart Shield
Epic Water Filters
Sink filter · Activated Carbon · Certified: NSF, IAPMO · Lab tested
Strong: lab data indexed, certified by a recognized body, filter technology disclosed.
91
#4
Tyent UCE-13 PLUS
Tyent
Sink filter · Reverse Osmosis, Activated Carbon · Certified: NSF · Lab tested
Strong: lab data indexed, certified by a recognized body, filter technology disclosed.
83
#5
Multipure Aquaperform MP880 Undersink Arsenic Plus Water Filter
Multipure
Sink filter · VOC Carbon Filter, Microfiltration · Certified: NSF · Lab tested
Strong: lab data indexed, certified by a recognized body, filter technology disclosed.
82
#6
iSpring RCC7 Reverse Osmosis System
Ispring
Sink filter · Reverse Osmosis, Polypropylene (PP), Activated Carbon · Certified: NSF · Lab tested
Strong: lab data indexed, certified by a recognized body, filter technology disclosed.
80
#7
Cloud RO
Cloud Water Filters
Sink filter · Reverse Osmosis, Sediment, Remineralization · Certified: NSF · Lab tested
Strong: lab data indexed, certified by a recognized body, filter technology disclosed.
80
#8
Doulton Ecofast Under Sink Water Filter System with Biotect Ultra
Doulton
Sink filter · Activated Carbon, Microfiltration · Certified: NSF · Lab tested
Strong: lab data indexed, certified by a recognized body, filter technology disclosed.
74
#9
Aqua-Pure RO5500 Reverse Osmosis System
Aqua-Pure
Sink filter · Reverse Osmosis, Sediment, Activated Carbon · Certified: NSF · Lab tested
Strong: lab data indexed, certified by a recognized body, filter technology disclosed.
68
#10
InSinkErator F-3000S Water Filtration System
InSinkErator
Sink filter · Coconut Shell Activated Carbon, Ultrafiltration · Lab tested
Strong: lab data indexed, filter technology disclosed. Weak: certified by a recognized body.
66
#11
Hydrovos Under Sink Water Filter System
Hydrovos
Sink filter · Certified: IAPMO · Lab tested
Strong: lab data indexed, certified by a recognized body. Weak: filter technology disclosed.
65
#12
Sentry Wellness System
Sentry H2O
Sink filter · Sediment, Catalytic carbon, Ion-Exchange Resin · Lab tested
Strong: lab data indexed, filter technology disclosed. Weak: certified by a recognized body.
65
#13
Doulton® Ultracarb (9501)
Doulton
Sink filter · Activated Carbon, Microfiltration · Lab tested
Strong: lab data indexed, filter technology disclosed. Weak: certified by a recognized body.
64
#14
InSinkErator F-2000S Water Filtration System
InSinkErator
Sink filter · Coconut Shell Activated Carbon, Ultrafiltration · Lab tested
Strong: lab data indexed, filter technology disclosed. Weak: certified by a recognized body.
60
#15
Water2 Pod 2.0 Filter
Water2
Sink filter · Activated Carbon, Ultrafiltration · Lab tested
Strong: lab data indexed, filter technology disclosed. Weak: certified by a recognized body.
59
#16
Helios Sink Filter
Helios
Sink filter · Sediment · Lab tested
Strong: lab data indexed, filter technology disclosed. Weak: certified by a recognized body.
55
#17
GE Under Sink Water Filter
GE Appliances
Sink filter · Certified: NSF · Lab tested
Strong: lab data indexed, certified by a recognized body. Weak: verified contaminant removal, filter technology disclosed.
46
#18
Mist Tankless RO System
Mist
Sink filter · Reverse Osmosis, Activated Carbon · Certified: IAPMO
Strong: certified by a recognized body, filter technology disclosed. Weak: verified contaminant removal, lab data indexed.
44
#19
Brio AQUUS Tankless RO Undersink Filtration System
Brio
Sink filter · Reverse Osmosis · Certified: NSF
Strong: certified by a recognized body, filter technology disclosed. Weak: verified contaminant removal, lab data indexed.
43
#20
kpure 5-Stage Reverse Osmosis System
Geekpure
Sink filter · Reverse Osmosis · Certified: NSF
Strong: certified by a recognized body, filter technology disclosed. Weak: verified contaminant removal, lab data indexed.
43
#21
Finerfilters 6-Stage Unde Sink Reverse Osmosis System
Finerfilters
Sink filter · Reverse Osmosis
Weak: perfluorinated chemicals (pfas), chemical disinfectants, heavy metals.
40
#22
Brio 3-Stage Undersink Filtration System
Brio
Sink filter · Sediment, Activated Carbon · Certified: NSF
Strong: certified by a recognized body, filter technology disclosed. Weak: verified contaminant removal, lab data indexed.
35
#23
Watts 2-Stage LCV Drinking Water System
Watts
Sink filter · Sediment, Activated Carbon · Certified: WQA · Lab tested
Strong: certified by a recognized body, filter technology disclosed. Weak: verified contaminant removal, lab data indexed.
35
#24
Comfee Reverse Osmosis Water Filter System
Comfee
Sink filter · Reverse Osmosis, Activated Carbon
Strong: filter technology disclosed. Weak: verified contaminant removal, lab data indexed, certified by a recognized body.
34
#25
ICEPURE Under Sink Water Filter System
Icepure
Sink filter · Reverse Osmosis
Strong: filter technology disclosed. Weak: verified contaminant removal, lab data indexed, certified by a recognized body.
33

Showing the top 25 of 36. See the full filter leaderboard with filters for packaging, source and lab testing.

Frequently asked questions

What is the best under-sink water filter?

Aquasana SmartFlow Reverse Osmosis (97/100) ranks highest in our data.

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