Certified to remove
Water filters certified to remove Total Trihalomethanes
Chlorination byproduct; MCL 80 ug/L. Long-term bladder cancer and reproductive risk. Higher in surface-water systems.
291
certified models
23
sold on Amazon
"Certified" means the model is listed in the NSF, WQA, or IAPMO public database as reducing Total Trihalomethanes — 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 Total Trihalomethanes.
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.
Best permanent solution
Aquasana
AQ-5300
Under-sink · lowest long-term cost
$125.99 · 14.0¢/gal
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.
114 consumer filters certified to remove Total Trihalomethanes
Recognizable brands worth shopping. (291 models are certified in total, including commercial, dealer-installed, and OEM units — see the full registry.)
| Filter | Type | Capacity | Price | ¢/gal | |
|---|---|---|---|---|---|
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 |
Pentair OmniFilter CBF3 NSF | UNDER-SINK | 400 gal | $92.36 | 23.1 | Check price |
Whirlpool W11569863 NSF | REFRIGERATOR | 200 gal | $53.99 | 27.0 | Check price |
Whirlpool W11569861 NSF | REFRIGERATOR | 100 gal | $53.99 | 54.0 | Check price |
PUR FM2500V NSF | FAUCET-MOUNT | 100 gal | $29.99 | — | 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 |
3M 3MDW301 NSF | UNDER-SINK | 1,000 gal | $294 | — | 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 |
Brondell RC250 WQA | REVERSE OSMOSIS | 300 gal | $329.99 | — | Check price |
Aquasana AQ-5300+.NF WQA | UNDER-SINK | 800 gal | — | 10.5 | |
Aquasana AQ-6300M WQA | UNDER-SINK | 800 gal | — | 11.5 | |
PUR FM-2000B NSF | FAUCET-MOUNT | 100 gal | — | 13.0 | |
PUR FM-3333B NSF | FAUCET-MOUNT | 100 gal | — | 13.0 | |
PUR FM2100B NSF | FAUCET-MOUNT | 100 gal | — | 13.0 | |
PUR FM2700G NSF | FAUCET-MOUNT | 100 gal | — | 13.0 | |
PUR PFM100B NSF | FAUCET-MOUNT | 100 gal | — | 13.0 | |
PUR PFM150W NSF | FAUCET-MOUNT | 100 gal | — | 13.0 | |
PUR PFM222B NSF | FAUCET-MOUNT | 100 gal | — | 13.0 | |
PUR PFM270G NSF | FAUCET-MOUNT | 100 gal | — | 13.0 | |
PUR PFM360F NSF | FAUCET-MOUNT | 100 gal | — | 13.0 | |
PUR PFM400H NSF | FAUCET-MOUNT | 100 gal | — | 13.0 | |
PUR PFM450S NSF | FAUCET-MOUNT | 100 gal | — | 13.0 | |
PUR PFM800HX NSF | FAUCET-MOUNT | 100 gal | — | 13.0 | |
PUR FM2800N NSF | FAUCET-MOUNT | 100 gal | — | 13.0 | |
PUR PFM244W NSF | FAUCET-MOUNT | 100 gal | — | 13.0 | |
PUR PFM310M NSF | FAUCET-MOUNT | 100 gal | — | 13.0 | |
PUR PFM410F NSF | FAUCET-MOUNT | 100 gal | — | 13.0 | |
PUR PFM400HBB NSF | FAUCET-MOUNT | 100 gal | — | 13.0 | |
Aquasana AQ-6300 WQA | UNDER-SINK | 600 gal | — | 14.0 | |
Aquasana AQ-6200 WQA | UNDER-SINK | 500 gal | — | 14.8 | |
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 122940CH NSF | FAUCET-MOUNT | 1,320 gal | — | — | |
eSpring 122940HK NSF | FAUCET-MOUNT | 1,320 gal | — | — | |
eSpring 122940J NSF | FAUCET-MOUNT | 1,320 gal | — | — | |
eSpring 122940K NSF | FAUCET-MOUNT | 1,320 gal | — | — | |
eSpring 122940M NSF | FAUCET-MOUNT | 1,320 gal | — | — | |
eSpring 122940SG NSF | FAUCET-MOUNT | 1,320 gal | — | — | |
eSpring 122940T NSF | FAUCET-MOUNT | 1,320 gal | — | — | |
eSpring 122940TH NSF | FAUCET-MOUNT | 1,320 gal | — | — | |
eSpring 122940 IN 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 | — | — | |
eSpring 122941CH NSF | UNDER-SINK | 1,320 gal | — | — | |
eSpring 122941J NSF | UNDER-SINK | 1,320 gal | — | — | |
eSpring 122941K NSF | UNDER-SINK | 1,320 gal | — | — | |
eSpring 122941T NSF | UNDER-SINK | 1,320 gal | — | — | |
Amway 100186X NSF | UNDER-SINK | 1,320 gal | — | — | |
Amway CXV5764 NSF | UNDER-SINK | 1,320 gal | — | — | |
Amway CXV6425 NSF | UNDER-SINK | 1,320 gal | — | — | |
eSpring WTI1167X NSF | UNDER-SINK | 1,320 gal | — | — | |
PUR FM-3700B NSF | FAUCET-MOUNT | 100 gal | — | — | |
PUR FM-4000B NSF | FAUCET-MOUNT | 100 gal | — | — | |
PUR PFM200B NSF | FAUCET-MOUNT | 100 gal | — | — | |
PUR PFM300V NSF | FAUCET-MOUNT | 100 gal | — | — | |
PUR PFM333C NSF | FAUCET-MOUNT | 100 gal | — | — | |
PUR PFM350V NSF | FAUCET-MOUNT | 100 gal | — | — | |
PUR PFM370C NSF | FAUCET-MOUNT | 100 gal | — | — | |
PUR PFM400C NSF | FAUCET-MOUNT | 100 gal | — | — | |
PUR PFM400HC NSF | FAUCET-MOUNT | 100 gal | — | — | |
PUR PFM420W NSF | FAUCET-MOUNT | 100 gal | — | — | |
PUR PFM800HXC NSF | FAUCET-MOUNT | 100 gal | — | — | |
LG ADQ747937 NSF | REFRIGERATOR | 200 gal | — | — | |
LG ADQ74793704 NSF | REFRIGERATOR | 105 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 | — | — | |
Multipure CB-EXTRA NSF | UNDER-SINK | 340 gal | — | — | |
Pentair Everpure Residential H-1200 NSF | UNDER-SINK | 1,000 gal | — | — | |
Pentair OmniFilter OT32 NSF | UNDER-SINK | 400 gal | — | — | |
Samsung RWP70a15def NSF/WQA | UNDER-SINK | 330 gal | — | — | |
Samsung RWP90 a bc d e f gh NSF/WQA | UNDER-SINK | 330 gal | — | — | |
Samsung RWPa4 x 2bcde y NSF | UNDER-SINK | 330 gal | — | — | |
Samsung RWP50020BWW NSF | REFRIGERATOR | 330 gal | — | — | |
Kenmore P1KB1 NSF | REFRIGERATOR | 200 gal | — | — | |
Kenmore P1KB2 NSF | REFRIGERATOR | 100 gal | — | — | |
3M 3MDW310 NSF | UNDER-SINK | 1,000 gal | — | — | |
Whirlpool P1WB2L NSF | REFRIGERATOR | 200 gal | — | — | |
Whirlpool P8WB2L NSF | REFRIGERATOR | 200 gal | — | — | |
Whirlpool W11602565 NSF | REFRIGERATOR | 100 gal | — | — | |
Pentair P-250 NSF | UNDER-SINK | 1,000 gal | — | — | |
Pentair P-250A NSF | UNDER-SINK | 500 gal | — | — | |
Pentair W-250 NSF | UNDER-SINK | 1,000 gal | — | — | |
ZeroWater ZAS NSF | UNDER-SINK | 600 gal | — | — | |
A.O. Smith High Efficiency Reverse Osmosis AOS-HERO-CHR WQA | REVERSE OSMOSIS | 250 gal | — | — | |
Amway 122940XX WQA | FAUCET-MOUNT | 1,320 gal | — | — | |
Amway 100188CH WQA | FAUCET-MOUNT | 1,320 gal | — | — | |
Amway 100189CH WQA | FAUCET-MOUNT | 1,320 gal | — | — | |
Amway 122940CH WQA | FAUCET-MOUNT | 1,320 gal | — | — | |
Aquasana AQ-SFRO2 WQA | REVERSE OSMOSIS | 25.7 gal | — | — | |
Aquasana OptimH2O AQ-RO-3 WQA | REVERSE OSMOSIS | 13.32 gal | — | — | |
Brondell RC100 WQA | REVERSE OSMOSIS | 180 gal | — | — | |
Culligan RO (2 yr) WQA | REVERSE OSMOSIS | 27.8 gal | — | — | |
Culligan Smart RO WQA | REVERSE OSMOSIS | 34.1 gal | — | — | |
Culligan Smart RO (2 yr) WQA | REVERSE OSMOSIS | 34.1 gal | — | — | |
Culligan Smart RO (2yr) Nitrate WQA | REVERSE OSMOSIS | 34.1 gal | — | — | |
Culligan Smart RO Nitrate WQA | REVERSE OSMOSIS | 34.1 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.