Because your water deserves more
NSF Certified Water Filters — Independently Tested by IAPMO
Not all water filters are created equal. Culligan delivers independently certified performance—backed by decades of water expertise.
IAPMO certified performance
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Don’t trust marketing hype, expect laboratory proven performance
Why IAPMO Certification Matters
Certifications push filters to the limit, literally. IAPMO tests to NSF/ANSI industry benchmarks with water at extreme contaminant levels and tests for biproducts to ensure nothing unexpected is left in your water.
If a claim isn’t IAPMO certified in a laboratory setting, there’s no guarantee a filter will perform consistently or do what’s promised.
Our filters are independently tested and certified to NSF/ANSI standards by IAPMO, an accredited third-party organization. Certification means contaminant reduction has been verified, not just claimed.
Certifications
Guaranteed to remove 99.9% of dissolved solids and harmful contaminants, Culligan with ZeroWater Technology provides superior filtration with its 5-stage advanced water filtration technology. Our tried-and-true ZeroWater legacy collection is certified to reduce chlorine, lead, chromium 6, PFOA/PFOS. As for Culligan with ZeroWater Technology—our newest innovation—expect a system that is certified to filter the previously mentioned contaminants, as well as total PFAS, pharmaceuticals, and pesticides for next-level filtration.
Our legacy ZeroWater 5-stage advanced water filter is where better taste meets superior water filtration. Legacy ZeroWater Filter is IAPMO-certified to reduce lead, the forever chemicals PFOA/PFOS, chromium, and mercury giving you peace of mind that every glass you pour for you and your family will be healthier and cleaner.
The only gravity water filter certified to remove lead, microplastics and Total PFAS (forever chemicals). Culligan with MaxClear Technology delivers clean, great-tasting water. Combining both ceramic and carbon filtration technologies, our filters are guaranteed to remove 99% of lead, Total PFAS (forever chemicals) and chlorine.
Competitors claim, but we deliver
Unlike some competitors, Culligan filters to IAPMO-certified standards for all our stated contaminants, so you can trust our performance and rest assured on every pour.
The proof is in the pour
| Certified to reduce |
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| Total PFAS* | ||
| Lead | ||
| Chlorine | ||
| Pharmaceuticals* | ||
| Pesticides* |
*See performance datasheet for specific Culligan with ZeroWater technology contaminant reductions **Brita standard filter OB03. Brita is a trademark of Brita LP. As of 3/1/2025 Brita® Performance Data Sheets.
Let's compare
Other filters may carry NSF or IAPMO labels, but they may not be tested on the contaminants that matter. Explore detailed comparisons showing how Culligan stacks up against other popular filtration systems.
But my filter says it's NSF/ANSI Certified!
Take a closer look – competitors may not actually remove what they say. If a device says it’s certified to be Lead Free, that doesn’t mean it’s treating lead. Similarly, a filter can be NSF/ANSI certified to treat chlorine but may not be treating more worrisome contaminants.
Culligan pitchers and dispensers are IAPMO certified and tested to reduce Lead, Total PFAS, Pharmaceuticals, Pesticides, and more.
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With independent testing and IAPMO certification, Culligan makes it easy to choose the right solution for better-tasting water and added peace of mind.
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MaxClear TechnologyScout 2.25 Gallon Gravity Countertop System
For smaller households (1-3 people)From
Water you love.™
For nearly a century, Culligan has been dedicated to improving water quality for homes around the world.
Our experience goes far beyond consumer filtration—we’ve built our reputation on understanding water chemistry, treatment technologies, and real-world performance. That depth of knowledge shows up in every product we design, test, and stand behind.
When you choose Culligan, you’re not just buying a filter—you’re choosing a company that’s spent decades earning trust, one glass of water at a time.