# Water Filters - webcentive

Source: https://www.webcentive.com/shopwaterfilters/  
Format: Markdown version of the HTML page (same content, lookups and page chrome left out).

Water filters, starting with your water. City water: read your utility's yearly quality report. Private well: nobody tests it for you, so test at least yearly for bacteria and nitrate, and for lead, arsenic or PFAS if they are found nearby. Then pick a filter certified (NSF/ANSI or WQA) for the exact contaminant you need removed; look up the model, not just the brand. Change cartridges on schedule. Off-grid and in emergencies, boil or disinfect water, or use a filter rated for bacteria and protozoa. Brands and stores below are commercial.  

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Each site has quick lookups: who owns it (whois), its history (Wayback Machine), a safety check, and one-tap questions to AI helpers. Grok asks you to tap Send first.  
Links last checked Oct 19, 2026.  

- **Know your water first (start here)**
- [cdc.gov](https://www.cdc.gov/drinking-water/safety/index.html) - CDC: well water safety
- [cdc.gov (drinking water)](https://www.cdc.gov/drinking-water/) - CDC: drinking water
- [epa.gov](https://www.epa.gov/ground-water-and-drinking-water) - EPA: drinking water basics
- [epa.gov (CCR)](https://www.epa.gov/ccr/ccr-information-consumers) - EPA: read your water utility's yearly quality report
- [epa.gov (emergency)](https://www.epa.gov/ground-water-and-drinking-water/emergency-disinfection-drinking-water) - EPA: boil or disinfect water in an emergency
- [epa.gov (lead)](https://www.epa.gov/ground-water-and-drinking-water/basic-information-about-lead-drinking-water) - EPA: lead in drinking water
- [epa.gov (PFAS)](https://www.epa.gov/sdwa/and-polyfluoroalkyl-substances-pfas) - EPA PFAS drinking water rule (2024) and 2025-26 proposed changes
- [epa.gov (state wells)](https://www.epa.gov/privatewells/private-drinking-water-well-programs-your-state) - EPA: well programs and testing help in your state
- [epa.gov (wells)](https://www.epa.gov/privatewells) - EPA private wells: you are responsible for testing your well
- [ngwa.org](https://www.ngwa.org/) - National Ground Water Association
- [sdwis.epa.gov](https://sdwis.epa.gov/fylccr) - EPA: find your local water quality report (CCR)
- [wellowner.org](https://www.wellowner.org/) - Water Systems Council: well owner help (may block automated checks)
- **Find a certified filter**
- [find.wqa.org](https://find.wqa.org/find-products) - WQA Gold Seal certified product search
- [iapmort.org](https://iapmort.org/) - IAPMO R&T: certified filter listings
- [info.nsf.org](https://info.nsf.org/Certified/DWTU/) - NSF/ANSI certified filter search: check the exact model
- [mytapscore.com](https://mytapscore.com/) - Tap Score: lab water test kits
- [wqa.org](https://wqa.org/) - Water Quality Association: find a certified water pro
- **Home and whole-house filters (commercial)**
- [apecwater.com](https://www.apecwater.com/) - APEC reverse osmosis (freedrinkingwater.com on the old page)
- [aquasana.com](https://www.aquasana.com/) - Aquasana (on the old page)
- [brita.com](https://www.brita.com/) - Brita (filterforgood.com on the old page) (on the old page)
- [culligan.com](https://www.culligan.com/) - Culligan
- [ispring.com](https://www.ispring.com/) - iSpring
- [kinetico.com](https://www.kinetico.com/) - Kinetico (on the old page)
- [pentair.com](https://www.pentair.com/) - Pentair and Everpure
- [pur.com](https://www.pur.com/) - PUR
- [purewaterfreedom.com](https://purewaterfreedom.com/) - Pure Water Freedom (on the old page)
- [raindancewatersystems.com](https://www.raindancewatersystems.com/) - RainDance Water Systems (on the old page)
- [theperfectwater.com](https://www.theperfectwater.com/) - Home Master (advancedwaterfilters.com on the old page)
- [waterdropfilter.com](https://www.waterdropfilter.com/) - Waterdrop
- [zerowater.com](https://zerowater.com/) - ZeroWater
- **Off-grid, camping and emergency filters (commercial)**
- [cascadedesigns.com](https://cascadedesigns.com/pages/msr) - MSR: backcountry filters and purifiers
- [katadyn.com](https://katadyn.com/) - Katadyn (on the old page)
- [lifestraw.com](https://lifestraw.com/) - LifeStraw
- [sawyer.com](https://www.sawyer.com/) - Sawyer: squeeze and gravity filters
- **Filter stores and test gear (commercial)**
- [amazon.com](https://www.amazon.com/s?k=nsf+certified+water+filter&tag=webcentive) - Amazon: NSF-certified water filters (on the old page)
- [bigbrandwater.com](https://www.bigbrandwater.com/) - Big Brand Water Filter (on the old page)
- [discountfilterstore.com](https://www.discountfilterstore.com/) - Discount Filter Store (on the old page)
- [filtersfast.com](https://www.filtersfast.com/) - Filters Fast (may block automated checks) (on the old page)
- [fridgefilters.com](https://www.fridgefilters.com/) - FridgeFilters (on the old page)
- [hannainst.com](https://hannainst.com/) - Hanna Instruments: water test meters (on the old page)
- [homedepot.com](https://www.homedepot.com/) - The Home Depot

Number of links: 41  
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