Water Filters Explained: Certifications

About this eBook

Explains what water filter certifications mean: NSF/ANSI 42, 53, 58, 401 and the PFAS standard, other certifiers, which certification covers which contaminant, filter types, replacement and hidden running costs, how to verify a listing in the NSF database, spotting misleading claims, cost per gallon, and when to replace a cartridge early.

• What each NSF/ANSI standard covers
• How to verify a filter's certification yourself
• Replacement and running costs per year
• Shopping checklist and maintenance log

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What's inside

1. Introduction: Why Your Filter Label Lies Unless It's Certified
2. Chapter 1: Why Certification Matters - The NSF Gold Standard
3. Chapter 2: NSF/ANSI 42 - Aesthetic Effects: Chlorine, Taste & Odor
4. Chapter 3: NSF/ANSI 53 - Health Effects: Lead, Cysts, VOCs
5. Chapter 4: NSF/ANSI 58 - Reverse Osmosis Systems Demystified
6. Chapter 5: NSF/ANSI 401 - Emerging Contaminants: Pharmaceuticals & BPA
7. Chapter 6: NSF/ANSI 473 / NSF P473 - PFOA & PFOS - The PFAS Standard
8. Chapter 7: IAPMO R&T, WQA Gold Seal & Other Certifiers
9. Chapter 8: Contaminant Removal Matrix - Which Certification Removes What?
10. Chapter 9: Filter Types Explained - Carbon, RO, UV, Ion Exchange, Ceramic
11. Chapter 10: Replacement Costs - The $30 to $200 Per Year Reality
12. Chapter 11: Hidden Costs - RO Waste Water, Electricity & Scale
13. Chapter 12: How to Verify - Step-by-Step NSF Database Search
14. Chapter 13: Fake Certifications, Self-Certified & Misleading Marketing
15. Chapter 14: Best Certified Systems Ranked by Category 2025
16. Chapter 15: Maintenance Log Template & Service Tracker
17. Chapter 16: Cost Per Gallon Filtered - True Value Calculation
18. Chapter 17: When to Replace Early - Pressure Drops, TDS Creep & Smell
19. Chapter 18: Action Checklist - Your 14-Day Certified Water Plan
20. Conclusion: Certified Water, Confident Home
21. Bonus: 25-Point Filter Shopping Checklist PDF Template
22. Appendix A: Glossary of Terms
23. Appendix B: EPA MCLs vs NSF Reduction Targets
24. Appendix C: Resources & Database Links

Put it to use

• Mineral water vs spring water
• Compare bottled waters