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CLEAN WATER, PROVEN PERFORMANCE
Filter Testing and Certification
Discover how water filters are tested and certified, and why this kind of third-party verification is critical.
Tested vs. Certification
Testing and certification sound similar, but they mean very different things.
At-home vs controlled
Are All Labs & Tests Created Equal?
No, and the difference matters.
At-Home Tests
Services like MyTapScore rely on self-collected samples to provide a snapshot of your current water quality. From sampling errors to preservation issues during shipping, at-home tests often lack the precision and reliability of professionally controlled tests that start and end in a laboratory.
Controlled Tests
In addition to eliminating any human error or shipping issues, accredited labs follow standardized protocols and use calibrated equipment to produce repeatable results. That's why every Clearly Filtered product is tested in one.
UNDERSTAND TESTING VS. CERTIFICATION
Testing to NSF Standards vs. NSF Certification
Independent labs evaluate a filter’s performance using NSF/ANSI testing protocols, measuring contaminant reduction, flow rate, and durability. However, this testing does not result in official NSF certification.
NSF Certification goes beyond product testing to include material safety reviews, structural integrity testing, and manufacturing facility audits to verify consistent filter quality and performance.
Tested & Certified
Filter Performance
We openly share our lab test results so you can understand how your filter performs, know when it might be time for a replacement, and have complete confidence in every sip.
Certified by Experts, Chosen by Families
By partnering with the most qualified labs, we ensure that every Clearly Filtered system delivers exceptional water filtration.
How & Why We Test
Keep reading to learn more about how testing and certification work and why it matters for your water.
Wondering What's In Your Water?
Tap the button below to see the specific contaminants in your local water supply (and how to best protect yourself and your loved ones).
NEW YORK CITY
Bromodichloromethane, Chloroform, Haloacetic acids (HAA5), Nitrate, Chromium (hexavalent), Trichloroacetic acid + 12 more in New York City.
LOS ANGELES
Arsenic, Total Trihalomethanes (TTHMs), Fluoride, Haloacetic acids (HAA5), Chromium, Bromoform, 1,4-Dioxane + 23 more in Los Angeles.
CHICAGO
Total trihalomethanes (TTHMs), Chloroform, Fluoride, Barium, Radium, combined (-226 & -228), Chromium (hexavalent) + 16 more in Chicago.
