Culligan US-EZ-4 vs Aquasana AQ-5200
Both are excellent, genuinely certified picks. The Culligan's NSF/ANSI 401 and PFAS certification edges it ahead on breadth; compare cost per gallon for your usage.
Both are among the best-certified under-sink filters we score. The Culligan is IAPMO-certified to NSF/ANSI 42, 53, and 401 including PFOA/PFOS; the Aquasana is certified for lead, PFAS, and chlorine. The choice comes down to certified scope and running cost.
| 9.0 | Verified Contaminant Reduction35% | 9.0 |
| 5.0 | Total Cost of Ownership25% | 2.5 |
| 8.0 | Certification Independence15% | 10.0 |
| 8.0 | Capacity & Flow Fit15% | 8.0 |
| 7.0 | Practical Fit10% | 7.0 |
FAQ
- Are both certified for PFAS?
- Yes. The Culligan is certified for PFOA/PFOS under NSF/ANSI 401, and the Aquasana is certified for PFOA/PFOS. Both are verifiable, unlike many 'tested to' competitors.