Certified to remove
Water filters certified to remove Giardia
Protozoan parasite causing giardiasis (diarrhea). Regulated by treatment technique (SWTR).
1,317
certified models
96
sold on Amazon
"Certified" means the model is listed in the NSF, WQA, or IAPMO public database as reducing Giardia — not just "tested to" a standard.
Two ways to fix it
Pick the path that fits you
You can start cheap with a no-install filter, or solve it permanently with an installed system that costs far less per gallon over time. Both options below are certified to reduce Giardia.
Amazon prices as of October 20, 2026 at 2:01 PM ET. Prices can change; the price on Amazon is the one that counts. As an Amazon Associate we earn from qualifying purchases; some links are affiliate links and we may earn a commission at no extra cost to you. Disclosure.
Cheapest no-install fix
Vestergaard Frandsen Inc. (Lifestraw)
LifeStraw Home Glass 7-Cup
Pitcher · nothing to plumb
$51.96
Check price → 
Top certified picks on Amazon
Amazon prices as of October 20, 2026 at 2:01 PM ET. Prices can change; the price on Amazon is the one that counts. As an Amazon Associate we earn from qualifying purchases; some links are affiliate links and we may earn a commission at no extra cost to you. Disclosure.
185 consumer filters certified to remove Giardia
Recognizable brands worth shopping. (1,317 models are certified in total, including commercial, dealer-installed, and OEM units — see the full registry.)
| Filter | Type | Capacity | Price | ¢/gal | |
|---|---|---|---|---|---|
3M CFS8812X NSF | UNDER-SINK | 9,000 gal | $89 | 1.0 | Check price |
3M CFS8812X-S NSF | UNDER-SINK | 9,000 gal | $89 | 1.0 | Check price |
Samsung DA97-08006C NSF | REFRIGERATOR | 316 gal | $35.85 | 11.3 | Check price |
Aquasana AQ-5300 WQA | UNDER-SINK | 600 gal | $125.99 | 14.0 | Check price |
Aquasana AQ-5200 WQA | UNDER-SINK | 500 gal | $112.49 | 14.8 | Check price |
Whirlpool EDR5RXD1B NSF | REFRIGERATOR | 240 gal | $47.84 | 19.9 | Check price |
Whirlpool PWF-NL240V NSF | REFRIGERATOR | 240 gal | $47.84 | 19.9 | Check price |
Pentair OmniFilter CBF3 NSF | UNDER-SINK | 400 gal | $92.36 | 23.1 | Check price |
GE GXRQ18NBN NSF/IAPMO | REVERSE OSMOSIS | 260 gal | $229.98 | 24.6 | Check price |
GE GXRV40TBN NSF/IAPMO | REVERSE OSMOSIS | 260 gal | $229.21 | 24.6 | Check price |
Whirlpool W11569863 NSF | REFRIGERATOR | 200 gal | $53.99 | 27.0 | Check price |
Aqua-Pure AP-DWS1000 NSF | UNDER-SINK | 625 gal | $431.67 | 27.8 | Check price |
Aqua-Pure AP-DWS1000 LF NSF | UNDER-SINK | 625 gal | $431.67 | 27.8 | Check price |
Whirlpool W11569861 NSF | REFRIGERATOR | 100 gal | $53.99 | 54.0 | Check price |
Samsung DA97-08006C-1 NSF | REFRIGERATOR | 316 gal | $35.85 | — | Check price |
Doulton Biotect Ultra W9123050 NSF | UNDER-SINK | 600 gal | $109.99 | — | Check price |
Doulton Ultracarb W9123053 NSF | UNDER-SINK | 600 gal | $76 | — | Check price |
Samsung Samsung NSF | REFRIGERATOR | 316 gal | $58.99 | — | Check price |
Samsung Samsung NSF | REFRIGERATOR | 300 gal | $35.05 | — | Check price |
LG ADQ36006101-S NSF | REFRIGERATOR | 200 gal | $50.72 | — | Check price |
LG MDJ64844601 NSF | REFRIGERATOR | 200 gal | $47.41 | — | Check price |
LG ADQ73613401-S NSF | REFRIGERATOR | 200 gal | $50.55 | — | Check price |
Samsung Samsung NSF | REFRIGERATOR | 300 gal | $35.05 | — | Check price |
Multipure Aquaperform NSF | UNDER-SINK | 600 gal | $765 | — | Check price |
Multipure Aquaversa NSF | UNDER-SINK | 750 gal | $620 | — | Check price |
Pentair OmniFilter RS14 NSF | UNDER-SINK | 100 gal | $9.35 | — | Check price |
Pentair Easy Flow NSF | UNDER-SINK | 3,000 gal | $139.99 | — | Check price |
3M 3MDW301 NSF | UNDER-SINK | 1,000 gal | $294 | — | Check price |
Aqua-Pure 3MFF100 NSF | UNDER-SINK | 6,000 gal | $318.95 | — | Check price |
Whirlpool EDR1RXD1B NSF | REFRIGERATOR | 200 gal | $50.99 | — | Check price |
Whirlpool EDR1RXD1R NSF | REFRIGERATOR | 200 gal | $50.99 | — | Check price |
Whirlpool EDR2RXD1B NSF | REFRIGERATOR | 200 gal | $49.99 | — | Check price |
Whirlpool EDR2RXD1R NSF | REFRIGERATOR | 200 gal | $49.99 | — | Check price |
Whirlpool EDR3RXD1B NSF | REFRIGERATOR | 200 gal | $49.99 | — | Check price |
Whirlpool EDR3RXD1R NSF | REFRIGERATOR | 200 gal | $49.99 | — | Check price |
Whirlpool P1WB2 NSF | REFRIGERATOR | 200 gal | $49.99 | — | Check price |
Whirlpool P9WB2L NSF | REFRIGERATOR | 200 gal | $49.99 | — | Check price |
Whirlpool W11602799 NSF | REFRIGERATOR | 100 gal | $49.99 | — | Check price |
Whirlpool W11256135 NSF | REFRIGERATOR | 100 gal | $57 | — | Check price |
Whirlpool W11311161 NSF | REFRIGERATOR | 200 gal | $57 | — | Check price |
Pentair PB55-20 NSF | UNDER-SINK | 40,000 gal | $160.67 | — | Check price |
Pentair Floplus 10 NSF | UNDER-SINK | 1 gal | $33 | — | Check price |
Pentair Floplus 10BB NSF | UNDER-SINK | 1 gal | $81.35 | — | Check price |
Pentair Floplus 20 NSF | UNDER-SINK | 1 gal | $60.53 | — | Check price |
Pentair Floplus 20BB NSF | UNDER-SINK | 1 gal | $132.3 | — | Check price |
Pentair OmniFilter RO2050 NSF | REVERSE OSMOSIS | 1 gal | $154.57 | — | Check price |
Brondell RC250 WQA | REVERSE OSMOSIS | 300 gal | $329.99 | — | Check price |
3M DP390-M NSF | UNDER-SINK | 225,000 gal | — | 0.2 | |
3M DP290-M NSF | UNDER-SINK | 150,000 gal | — | 0.3 | |
Pentair GRO-350B NSF | REVERSE OSMOSIS | 750 gal | — | 5.7 | |
Pentair GRO-475B NSF | REVERSE OSMOSIS | 750 gal | — | 5.7 | |
Pentair GRO-475BP NSF | REVERSE OSMOSIS | 750 gal | — | 5.7 | |
Pentair F1000-B1B NSF | UNDER-SINK | 750 gal | — | 5.8 | |
Aquasana AQ-5300+.NF WQA | UNDER-SINK | 800 gal | — | 10.5 | |
Aquasana AQ-6300M WQA | UNDER-SINK | 800 gal | — | 11.5 | |
3M 3MRO301 NSF | REVERSE OSMOSIS | 1,500 gal | — | 13.8 | |
3M 3MRO401 NSF | REVERSE OSMOSIS | 1,500 gal | — | 13.8 | |
Aquasana AQ-6300 WQA | UNDER-SINK | 600 gal | — | 14.0 | |
Aquasana AQ-6200 WQA | UNDER-SINK | 500 gal | — | 14.8 | |
GE GNRQ18NBN NSF | REVERSE OSMOSIS | 260 gal | — | 24.6 | |
eSpring 122940C NSF | FAUCET-MOUNT | 1,320 gal | — | — | |
eSpring Model 122940VN NSF | FAUCET-MOUNT | 1,320 gal | — | — | |
eSpring 122940 NSF | FAUCET-MOUNT | 1,320 gal | — | — | |
eSpring 122940CA NSF | FAUCET-MOUNT | 1,320 gal | — | — | |
eSpring 122941C NSF | UNDER-SINK | 1,320 gal | — | — | |
eSpring 128212XY NSF | UNDER-SINK | 1,320 gal | — | — | |
eSpring Model 122941VN NSF | UNDER-SINK | 1,320 gal | — | — | |
eSpring 122941 NSF | UNDER-SINK | 1,320 gal | — | — | |
eSpring 122941CA NSF | UNDER-SINK | 1,320 gal | — | — | |
Samsung Samsung NSF | REFRIGERATOR | 300 gal | — | — | |
Samsung Samsung NSF | REFRIGERATOR | 300 gal | — | — | |
Bosch WFS200KF NSF | REFRIGERATOR | 250 gal | — | — | |
Bosch WFS210KF NSF | REFRIGERATOR | 150 gal | — | — | |
Doulton Ecofast Biotect Ultra Inline NSF | UNDER-SINK | 600 gal | — | — | |
Doulton Ecofast Ultracarb Inline NSF | UNDER-SINK | 600 gal | — | — | |
Doulton HIP NSF | UNDER-SINK | 1 gal | — | — | |
Doulton HIP NSF | UNDER-SINK | 600 gal | — | — | |
Doulton HIP Biotect Ultra Inline NSF | UNDER-SINK | 600 gal | — | — | |
Doulton QT Ultracarb Inline NSF | UNDER-SINK | 600 gal | — | — | |
Doulton QT1 Biotect Ultra Inline NSF | UNDER-SINK | 600 gal | — | — | |
Doulton Kingfisher NSF | UNDER-SINK | 600 gal | — | — | |
Berkefeld British Berkefeld SS2 Ultra Sterasyl NSF | PITCHER | 1 gal | — | — | |
Doulton Biotect Ultra SI NSF | UNDER-SINK | 600 gal | — | — | |
Doulton Biotect Ultracarb W9123070 NSF | UNDER-SINK | 600 gal | — | — | |
Doulton Sterasyl W9120562 NSF | UNDER-SINK | 1 gal | — | — | |
Doulton Ultra Sterasyl W9121226 NSF | PITCHER | 1 gal | — | — | |
LG EFF-6003S NSF/IAPMO | REFRIGERATOR | 300 gal | — | — | |
LG EFF-6005S NSF | REFRIGERATOR | 300 gal | — | — | |
LG EFF-6020S NSF | REFRIGERATOR | 300 gal | — | — | |
Geekpure ERO-175 NSF | REVERSE OSMOSIS | 3,850 gal | — | — | |
Frigidaire FF21110-S NSF | REFRIGERATOR | 300 gal | — | — | |
Frigidaire FF21120-S NSF | REFRIGERATOR | 300 gal | — | — | |
Frigidaire FF21130-S NSF | REFRIGERATOR | 300 gal | — | — | |
Frigidaire FF21140-S NSF | REFRIGERATOR | 200 gal | — | — | |
Frigidaire FF21200-S NSF | REFRIGERATOR | 300 gal | — | — | |
Frigidaire FF21310-S NSF | REFRIGERATOR | 300 gal | — | — | |
Frigidaire FF21340-S NSF | REFRIGERATOR | 316 gal | — | — | |
Frigidaire FF21420-S NSF | REFRIGERATOR | 300 gal | — | — | |
Frigidaire FF21430-S NSF | REFRIGERATOR | 300 gal | — | — | |
Frigidaire FF21510-S NSF | REFRIGERATOR | 300 gal | — | — | |
Frigidaire FF21630-S NSF | REFRIGERATOR | 200 gal | — | — | |
Frigidaire FSWFRF3628 NSF | REFRIGERATOR | 200 gal | — | — | |
GE M-SJWF300 NSF | REFRIGERATOR | 200 gal | — | — | |
LG 5231JA2006A-S NSF | REFRIGERATOR | 300 gal | — | — | |
LG ADQ36006102-S NSF | REFRIGERATOR | 200 gal | — | — | |
LG ADQ36006108-S NSF | REFRIGERATOR | 200 gal | — | — | |
LG ADQ36006109-S NSF | REFRIGERATOR | 200 gal | — | — | |
LG ADQ747937 NSF | REFRIGERATOR | 200 gal | — | — | |
LG ADQ74793704 NSF | REFRIGERATOR | 105 gal | — | — | |
LG LG NSF | UNDER-SINK | 200 gal | — | — | |
LG LG NSF | UNDER-SINK | 200 gal | — | — | |
Samsung Samsung NSF | REFRIGERATOR | 300 gal | — | — | |
Samsung Samsung NSF | REFRIGERATOR | 316 gal | — | — | |
Samsung Samsung NSF | REFRIGERATOR | 600 gal | — | — | |
Whirlpool WFS400MF NSF | REFRIGERATOR | 739 gal | — | — | |
Bosch WFS410MF NSF | REFRIGERATOR | 739 gal | — | — | |
Multipure AQUALUXE NSF | UNDER-SINK | 500 gal | — | — | |
Multipure Aqualite NSF | UNDER-SINK | 450 gal | — | — | |
Multipure Aquamini NSF | UNDER-SINK | 250 gal | — | — | |
Multipure Aquapremier NSF | UNDER-SINK | 340 gal | — | — |
Amazon prices as of October 20, 2026 at 2:01 PM ET. Prices can change; the price on Amazon is the one that counts. As an Amazon Associate we earn from qualifying purchases; some links are affiliate links and we may earn a commission at no extra cost to you. Disclosure.
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