Sink Filters
16 products ranked by Scout score-
Delta Clarifi Tankless Under Sink 6-Stage Reverse Osmosis System#1 -
Aquasana SmartFlow Reverse Osmosis#2 -
AO Smith High-Efficiency Reverse Osmosis#3 -
Epic Smart Shield#4 -
Tyent UCE-13 PLUS Water Ionizer#5 -
Multipure Aquaperform MP880 Undersink Water Filter#6 -
iSpring RCC7 Reverse Osmosis System#7 -
Cloud RO Reverse Osmosis System#8 -
InSinkErator F-3000S Water Filtration System#9 -
Sentry Wellness System Under Sink Filter#10 -
Doulton Ultracarb 9501 Under Sink Filter#11 -
Doulton Ecofast Under Sink Water Filter with Biotect Ultra#12 -
Culligan US-EZ Under-Sink Drinking Water Filter#13 -
InSinkErator F-2000S Water Filtration System#14 -
Hydrovos Under Sink Water Filter System#15 -
Water2 Pod 2.0 Filter#16
Best sink filters right now
- Delta Clarifi Tankless Under Sink 6-Stage Reverse Osmosis System 95/100
Scout's analysis: Delta Clarifi Reverse Osmosis System scores 95/100. Independently certified to NSF/ANSI 42, 53, 58 and 401, it reduces total PFAS by 99.5%, lead and arsenic by over…
- Aquasana SmartFlow Reverse Osmosis 94/100
Scout's analysis: Aquasana SmartFlow Reverse Osmosis scores 94/100 for water filtration performance. 12 contaminants effectively filtered. A reverse osmosis sink filter from Aquasana's…
- AO Smith High-Efficiency Reverse Osmosis 94/100
Scout's analysis: AO Smith High-Efficiency Reverse Osmosis scores 94/100 for water filtration performance. 12 contaminants effectively filtered. A high-efficiency reverse osmosis…
What to skip
- Water2 Pod 2.0 Filter 54/100
Scout's analysis: Water2 Pod 2.0 Filter scores 54/100 for water filtration performance. 6 contaminants effectively filtered.
- Hydrovos Under Sink Water Filter System 56/100
Scout's analysis: Hydrovos Under Sink Water Filter System scores 56/100 for water filtration performance. 4 contaminants effectively filtered. An under-sink water filter system rated…
- InSinkErator F-2000S Water Filtration System 56/100
Scout's analysis: InSinkErator F-2000S Water Filtration System scores 56/100 for water filtration performance. 9 contaminants effectively filtered. A sink water filtration system. It…
Ingredients to watch in sink filters
The flagged ingredients that show up most often across these 16 products. Each link opens Scout's analysis of the ingredient.
- Nitrates in 2 of 16
What the better sink filters have in common
- Chlorine in 13 of 16
- Sediment in 12 of 16
- Lead in 11 of 16
- Microplastics in 10 of 16
- PFAS in 9 of 16
Common questions about sink filters
What scores highest in sink filters on Scout?
Delta Clarifi Tankless Under Sink 6-Stage Reverse Osmosis System leads Scout's sink filters ranking at 95/100, followed by Aquasana SmartFlow Reverse Osmosis (94) and AO Smith High-Efficiency Reverse Osmosis (94). Scores compare products within the category on ingredients, processing, packaging and any lab results.
What should I avoid in sink filters?
Water2 Pod 2.0 Filter scores 54/100, the lowest of the 16 products Scout has analyzed in sink filters; next lowest are Hydrovos Under Sink Water Filter System (56) and InSinkErator F-2000S Water Filtration System (56). Each product page lists the ingredients behind the number.
What drags scores down in sink filters?
Across these 16 products the one flagged ingredient that recurs is Nitrates — it appears in 2 of them.
How does Scout score sink filters?
Every product in sink filters gets one 1–100 score for comparison within its category: the full ingredient list judged by a category-specific framework, the published processing level, the packaging, and any credible lab results. Lab results are disclosed, not scored. Scout takes no payment for scores or placement.
How Scout scores sink filters
One 1–100 score per product, judged within its category: every ingredient on the label through a category-specific framework, the published processing level, the packaging, and any credible lab results. No brand pays for a score or a position on this list. Read the full methodology →