Testing Vs Certification – Clearly Filtered

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.

01TestingEvaluates a filter’s performance under controlled conditions to measure a range of outcomes, such as contaminant reduction or performance against established water safety standards.

02CertificationAn accredited third-party organization publicly verifies that a filter’s performance meets established water safety standards.

03The DifferenceTesting measures a filter's performance. Certification confirms performance meets established water safety standards, verified by accredited third-party organizations.

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

TESTING TO NSF STANDARDS

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.

View Test Results

Certified by Experts, Chosen by Families

By partnering with the most qualified labs, we ensure that every Clearly Filtered system delivers exceptional water filtration.

Choose Your System

How & Why We Test

Keep reading to learn more about how testing and certification work and why it matters for your water.

Get the Full Story

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.

Free Water Report

TOTAL CONTAMINANTS FOUND IN:

New York City

No results found.

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