Water Filter Brand Reviews
We own and use products from 15 water filter brands. Most brands sell both good and mediocre products — our reviews isolate what's worth buying, what the NSF certification data actually says, and where each brand falls short. Scores reflect our own use and the certification listings, not press releases.
Aquasana
wholehouse, undersink, shower
Aquasana, owned by A.O. Smith since 2016, sells whole-house and point-of-use filters. Of the four we review, only the AQ-5300+ under-sink has a listing on file.
SpringWell
wholehouse, ro, undersink
SpringWell is an independent, direct-to-consumer brand known for high-capacity whole-house systems and transparent testing data.
AquaTru
countertop, ro
AquaTru makes countertop reverse osmosis systems requiring no plumbing — top pick for renters and those wanting RO without installation.
Clearly Filtered
pitcher, undersink, ro
Clearly Filtered makes pitchers, bottles and under-sink filters. NSF and WQA list its pitcher for chlorine, taste and odor only, with no lead or PFAS listing.
Brita
pitcher, faucet
Brita is the dominant household name in water filtration, but most models are optimized for taste/odor — not heavy metals or PFAS reduction.
ZeroWater
pitcher
ZeroWater uses a five-stage ion-exchange filter to achieve 0 TDS — impressive for total dissolved solids but at a higher filter cost per gallon.
Berkey
countertop
Berkey gravity filters are popular for emergency preparedness and off-grid use, though their certification status has been subject to scrutiny.
Waterdrop
ro, undersink, pitcher
Waterdrop offers a wide range of tankless RO systems and under-sink filters with modern design and competitive pricing.
APEC Water
ro, undersink
APEC is a US-based RO manufacturer known for durability and straightforward installation — popular with DIY installers.
iSpring
ro, undersink, wholehouse
iSpring offers an extensive product lineup from basic under-sink filters to whole-house multi-stage systems at accessible price points.
Hydroviv
undersink
Hydroviv custom-formulates filter media based on your local water quality report — founded by a PhD water scientist with strong E-E-A-T credibility.
Epic Water Filters
pitcher, faucet
Epic Water Filters sells pitcher and faucet filters. We found no NSF, IAPMO or WQA listing for the Epic Pure pitcher we review (checked September 13, 2026).
LifeStraw
pitcher, faucet
LifeStraw is best known for outdoor/emergency use but has expanded into home pitchers and faucet filters with solid biological contaminant removal.
PUR
pitcher, faucet
PUR sells widely available pitcher and faucet filters. IAPMO and WQA list the PUR Plus pitcher filter for lead reduction under NSF/ANSI 53.
Culligan
wholehouse, ro
Culligan is the oldest major water treatment brand, now operating as a service-based dealer network — products bundled with installation and maintenance.