AquaTru vs ZeroWater: both are certified by IAPMO R&T for lead and fluoride, but the AquaTru Carafe adds certified arsenic and microplastics reduction and costs less per gallon, while the Culligan ZeroWater pitcher carries the broader Total PFAS claim for a fraction of the price.
The catch: It costs much more up front and needs an outlet and counter space.
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How Do AquaTru and ZeroWater Compare?
A countertop reverse osmosis system against the pitcher best known for taking dissolved solids to zero. We compare the current Culligan ZeroWater pitcher, which carries ZeroWater’s broadest certifications. How we score
| # | Filter | Score | Certified by | Lead | PFAS | Fluoride | Running cost | Price |
|---|---|---|---|---|---|---|---|---|
| 01 | AquaTru CarafeBest of the twoCountertop RO | 4.6 | IAPMO R&T | Certified | Certified | Certified | $0.33/gal | $335.75on Amazon › |
| 02 | Culligan ZeroWaterBest pitcher, Total PFASPitcher | 4.2 | IAPMO R&T | Certified | Certified | Certified | $0.68 to $0.93/gal | See priceat Culligan › |
Certified: Certified by an independent body (named in each pick). Lab test: Tested by a named independent lab, not certified. Claim: The maker's claim, not certified. No: No claim. PFAS means PFOA/PFOS, or Total PFAS where the pick says so.
What Is Each One Certified to Remove?
Both are certified by IAPMO R&T.
| Contaminant | AquaTru Carafe | Culligan ZeroWater |
|---|---|---|
| Lead | Certified (NSF/ANSI 58) | Certified (NSF/ANSI 53) |
| Fluoride | Certified (NSF/ANSI 58) | Certified (NSF/ANSI 53) |
| PFAS | PFOA/PFOS (NSF/ANSI 53) | Total PFAS (NSF/ANSI 53) |
| Nitrate, chromium-6 | Certified (NSF/ANSI 58) | Certified |
| Arsenic | Certified (NSF/ANSI 58) | No claim |
| Mercury | No claim | Certified |
| Microplastics | Certified (NSF/ANSI 401) | No claim |
| Chlorine | Certified, plus chloramine (NSF/ANSI 42) | Certified (NSF/ANSI 42) |
| Rated filter life | 300 to 600 gal | 20 gal |
AquaTru: IAPMO R&T listings for models AT100 to AT140. The older ZeroWater 10-Cup (non-Culligan filter) is certified by IAPMO R&T for lead, chromium-6, mercury, and PFOA/PFOS, but not fluoride or Total PFAS, and its filters are rated for 15 gallons. Our ZeroWater 10-Cup review.
Is AquaTru or ZeroWater Better for PFAS?
The Culligan ZeroWater carries the broader certified claim: Total PFAS, which covers a longer list of PFAS compounds. The AquaTru Carafe is certified for PFOA and PFOS, the two best-known PFAS. If your water report shows other PFAS, such as PFHxS or PFNA, the Total PFAS claim is the closer match. See our PFAS filter guide.
Which Is Cheaper to Run?
The AquaTru Carafe, at about $0.33 a gallon at AquaTru’s filter prices, against $0.68 to $0.93 a gallon for the Culligan ZeroWater’s 20-gallon filters. A ZeroWater filter also runs out faster on water with high dissolved solids. The pitcher is far cheaper to buy, so it suits light use or a tight budget.
The Two in Detail
AquaTru Carafe
One of the broadest certified claim lists we've seen, including fluoride and arsenic, with no plumbing. It needs an outlet and makes half a gallon at a time, and its filters work out to about $0.33 a gallon at AquaTru's prices.
Culligan ZeroWater
One of few pitchers with certified fluoride reduction, plus Total PFAS. Filters cost $0.68 to $0.93 a gallon and run out faster on hard water.
AquaTru or ZeroWater: Which Should You Buy?
Pick the AquaTru Carafe if
You want one device certified for lead, fluoride, arsenic, nitrate, PFOA/PFOS, and microplastics, and you drink enough filtered water to make its lower cost per gallon count.
Pick the Culligan ZeroWater if
PFAS is your main concern and you want the Total PFAS claim, or your budget won’t stretch to a countertop system.
Consider the AquaTru Classic if
You want the AquaTru’s certifications with a larger tank. Our AquaTru Classic review.
Compare more countertop filters
See our countertop roundup and pitcher roundup.
Common questions
Is AquaTru or ZeroWater better?
For most homes, the AquaTru Carafe: it’s certified by IAPMO R&T for lead, fluoride, arsenic, nitrate, PFOA/PFOS, and microplastics, and costs less per gallon. The Culligan ZeroWater is the better pick if you want the Total PFAS claim in a cheap pitcher.
Does ZeroWater remove fluoride?
The Culligan ZeroWater pitcher is certified by IAPMO R&T for fluoride. The older ZeroWater 10-Cup filter is not. Check which filter you’re buying. See our fluoride guide.
How often do you change a ZeroWater filter?
Every 20 gallons for the Culligan ZeroWater filter, its certified capacity, and sooner on water high in dissolved solids. The included meter shows when it’s spent.
Does either remove microplastics?
The AquaTru Carafe is certified by IAPMO R&T for microplastics under NSF/ANSI 401. The Culligan ZeroWater has no microplastics claim. See our microplastics guide.
Why does AquaTru cost so much more?
It’s a powered reverse osmosis system, and its filters last 300 to 600 gallons against 20 for a ZeroWater filter. At about $0.33 a gallon against $0.68 to $0.93, the AquaTru costs less to run once you use it daily.
Prices as of November 1, 2026. Product prices and availability are accurate as of the date/time indicated and are subject to change. As an Amazon Associate we earn from qualifying purchases.