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Method ledger

How Havenraft scores water filters

Each product on the water filters scorecard gets one 0–100 score from the weighted formula below, computed only from published manufacturer specs and dated retailer records; we do not physically test products. The current table covers 20 products across 7 recorded spec fields, refreshed July 1, 2026.

Scale
0-100
Products
20
Fields
7
Updated
July 1, 2026

The weights

Water Filters scoring dimensions, weights, definitions, and data sources
DimensionWeightDefinitionData source
Filtration Stages22%This dimension reads listed stages from 1 to 10; higher numbers score better, while a missing value scores neutral.Stages
Filter Architecture20%This dimension maps listed filter type from Pitcher to Reverse Osmosis; top scale values score highest, and missing stays neutral.Filter Type
Filter Life16%This dimension reads listed filter life from 40 to 1,000,000; higher numbers score better, while a missing value scores neutral.Filter Life
NSF Certification14%The nsf certified score is binary: a listed yes earns full marks, while a no or a missing listing earns zero.Nsf Certified
Installation Burden10%The installation required score is binary: a listed yes earns full marks, while a no or a missing listing earns zero.Installation Required
Flow Rate10%This dimension reads listed flow rate from 0.04 to 15; higher numbers score better, while a missing value scores neutral.Flow Rate
Annual Filter Cost8%The scored range for listed annual filter cost spans 30 USD to 120 USD; lower numbers score better, with missing values held neutral.Annual Filter Cost
Total100%All dimensions above sum to the full score.Published score total
Water Filters filtration stages score breakdown for 5 ranked products by weighted scoring dimension. The top five water filters are separated by 10 points; filter life is the tiebreaker. Score contribution by dimension Filtration Stages (22%)Filter Architecture (20%)Filter Life (16%)NSF Certification (14%)Flow Rate (10%)Installation Burden (10%)Annual Filter Cost (8%) 0255075100 #1 Waterdrop G3P800 Tankless Reverse Osmosis System: 68/100 #1 Waterdrop G3P800 Tankless… 2220814 68/100 #2 ZeroWater 10-Cup 5-Stage Pitcher: 61/100 #2 ZeroWater 10-Cup 5-Stage… 101081410 61/100 #3 AquaTru Classic Countertop Reverse Osmosis: 60/100 #3 AquaTru Classic Countertop… 7201410 60/100 #4 APEC Water Systems APEC Ultimate 6-Stage Alkaline: 58/100 #4 APEC Water Systems APEC… 1220814 58/100 #5 Aquasana EQ-1000: 58/100 #5 Aquasana EQ-1000 7161614 58/100 Water Filters: weight x grade, 0-100 scale. Havenraft
  1. #1 Waterdrop G3P800 Tankless Reverse Osmosis System68/100Filtration Stages 22 pts, Filter Architecture 20 pts, NSF Certification 14 pts
  2. #2 ZeroWater 10-Cup 5-Stage Pitcher61/100NSF Certification 14 pts, Filter Architecture 10 pts, Installation Burden 10 pts
  3. #3 AquaTru Classic Countertop Reverse Osmosis60/100Filter Architecture 20 pts, NSF Certification 14 pts, Installation Burden 10 pts
  4. #4 APEC Water Systems APEC Ultimate 6-Stage Alkaline58/100Filter Architecture 20 pts, NSF Certification 14 pts, Filtration Stages 12 pts
  5. #5 Aquasana EQ-100058/100Filter Architecture 16 pts, Filter Life 16 pts, NSF Certification 14 pts
The top five water filters are separated by 10 points; filter life is the tiebreaker.

What the score bands mean

Score bands80+ strong60–79 solidBelow 60 limited fit

  • 80+: strong marks on the heaviest dimensions with few weak lines in the listed specs.
  • 60–79: competitive on most scored inputs, with at least one clearly weaker dimension.
  • Below 60: trails this field on the inputs weighted most; the product cards list exactly where.

Source hierarchy

Published manufacturer specifications rank first, dated retailer records second; marketing claims without a checkable figure are excluded from scoring. Missing values never earn invented numbers; they are labeled “not listed - neutral 50” and take the neutral 50 grade the weight definitions describe.

  1. Britamanufacturer evidence for 12 catalog fields
  2. ZeroWatermanufacturer evidence for 10 catalog fields
  3. PURmanufacturer evidence for 10 catalog fields
  4. Clearly Filteredmanufacturer evidence for 10 catalog fields
  5. LifeStrawmanufacturer evidence for 9 catalog fields
  6. Berkeymanufacturer evidence for 10 catalog fields
  7. AquaTrumanufacturer evidence for 11 catalog fields
  8. Waterdropmanufacturer evidence for 10 catalog fields
  9. Scored product catalog20 compared products
Water Filters freshness timeline showing source retrieval dates and the separate regeneration date. Havenraft source ledger tracks water filters with 9 retrieval records, retrieved 2026-07-01. For water filters, sources were retrieved 2026-07-01; the page was regenerated 2026-07-09, a build date kept separate from the source retrieval dates. Source freshness ledger Dots are source retrieval dates; the amber marker is the separate regeneration date. Brita: retrieved 2026-07-01 ZeroWater: retrieved 2026-07-01 PUR: retrieved 2026-07-01 Clearly Filtered: retrieved 2026-07-01 LifeStraw: retrieved 2026-07-01 Berkey: retrieved 2026-07-01 AquaTru: retrieved 2026-07-01 Waterdrop: retrieved 2026-07-01 Scored product catalog: retrieved 2026-07-01 Regenerated 2026-07-09 2026-07-012026-07-09 Water Filters keeps retrieved and regenerated dates distinct.

Retrieved · Built

  1. AquaTru2026-07-01Source record
  2. Berkey2026-07-01Source record
  3. Brita2026-07-01Source record
  4. Clearly Filtered2026-07-01Source record
  5. LifeStraw2026-07-01Source record
Havenraft source ledger tracks water filters with 9 retrieval records, retrieved 2026-07-01.

Update history

  • Rankings rebuilt from the refreshed catalog: 20 water filters re-scored on 7 published spec fields, filtration stages first.

Back to the water filters scorecard