The NSF is an independent organization that tests, approves, and certifies equipment to ensure compliance with established quality and safety standards. Companies voluntarily submit their products for evaluation by the NSF.

In the context of water and water filtration, the NSF assesses and certifies water treatment and filtration devices upon manufacturers’ request. This certification confirms that products meet standards for structural integrity, material safety, and contaminant reduction capabilities.

Key certifications relevant to water filtration include:

• NSF/ANSI 42: Ensures the reduction of aesthetic impurities such as taste, odor, and chlorine.
• NSF/ANSI 53: Focuses on the reduction of health-related contaminants, including lead, PFAS, and Cryptosporidium.
• NSF/ANSI 372: Verifies the absence of lead in materials used.

The great news is that British Berkefeld Ultra Sterasyl filters hold certifications for NSF 42, NSF 53, and NSF 372.