Product intelligence · compare
Compare Water Filters
Put up to three product profiles side by side. Compare measurable differences and documented constraints; PurityMap does not declare a universal winner.
STEP 1
Choose up to three products
3/3 selected
- Berkey PF-2 Fluoride & Arsenic Element (not certified)Countertop System · Activated Alumina
- AquaTru Classic Countertop Reverse-Osmosis Purifier (AT2000)Countertop System · Reverse Osmosis
- AquaTru Carafe Countertop Reverse-Osmosis Purifier (AT100)Countertop System · Reverse Osmosis
STEP 2
Compare the evidence
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| 3 products |  Countertop SystemBerkey PF-2 Fluoride & Arsenic Element (not certified)No verified certification |  Countertop SystemAquaTru Classic Countertop Reverse-Osmosis Purifier (AT2000)3 verified certifications |  Countertop SystemAquaTru Carafe Countertop Reverse-Osmosis Purifier (AT100)3 verified certifications |
|---|---|---|---|
| Fit | What each product is for, in its own record. | ||
| Best suited for | Not published | A no-installation reverse-osmosis option for renters: certified for lead, fluoride, arsenic V and nitrate (NSF/ANSI 58) and PFOA/PFOS (NSF/ANSI 53). | A compact no-installation reverse-osmosis option: certified for lead, fluoride, arsenic V and nitrate (NSF/ANSI 58), PFOA/PFOS (NSF/ANSI 53) and chlorine/chloramine (NSF/ANSI 42). |
| Technology | Activated Alumina | Reverse Osmosis | Reverse Osmosis |
| Installation format | Countertop System | Countertop System | Countertop System |
| Certification coverage | A target counts only when a current certification record covers this exact product. It does not mean a concern is present in your water. | ||
| Fluoride | ? | ✓ | ✓ |
| Arsenic V / pre-oxidized arsenic III | ? | – | – |
| Lead | – | ✓ | ✓ |
| Arsenic V | – | ✓ | ✓ |
| Nitrate/nitrite | – | ✓ | ✓ |
| Perchlorate | – | ✓ | ✓ |
| Barium | – | ✓ | ✓ |
| Chromium | – | ✓ | ✓ |
| Copper | – | ✓ | ✓ |
| Radium 226/228 | – | ✓ | ✓ |
| Selenium | – | ✓ | ✓ |
| Cyst | – | ✓ | ✓ |
| TDS | – | ✓ | ✓ |
| PFOA | – | ✓ | ✓ |
| PFOS | – | ✓ | ✓ |
| VOC (chloroform surrogate) | – | ✓ | ✓ |
| Chlorine taste/odor | – | ✓ | ✓ |
| Aesthetic chloramine | – | ✓ | ✓ |
| Particulate | – | ✓ | ✓ |
| Verified certifications | None verified | NSF/ANSI 58NSF/ANSI 53NSF/ANSI 42 | NSF/ANSI 58NSF/ANSI 53NSF/ANSI 42 |
| Certifier registry | None linked | Registry listing ↗ | Registry listing ↗ |
| Limitations and trade-offs | Documented constraints from each product record. | ||
| Limitations |
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| Specifications | “Not published” means the manufacturer has not stated it. | ||
| Dimensions | Typical: under-sink cartridge or countertop canister | Countertop unit, no plumbing or faucet changes | Compact countertop unit with a glass carafe, no plumbing |
| Rated capacityGallons before replacement | 1,000 gallons | Not published | Not published |
| Flow rate | Not published | Not published | Not published |
| Filter replacement | Not published | Not published | Not published |
| Typical annual upkeep | $80/year | $74/year | $74/year |
| Warranty | Not published | Not published | Not published |
| Where to buy | Read the analysis before the offer. | ||
| OfferPrices and availability are shown on Amazon | Read the analysis No current offer | Read the analysisCheck price on Amazon | Read the analysisCheck price on Amazon |
- Current certification record covers it
- Claimed, not established by a current record
- No claim on record
No universal winner
The right filter depends on what’s in your water.
Start from your water system’s record, then compare only the products certified for what it found.