Implementation of certification and audit in accordance with the standards of the international organization NSF International involves strict criteria for production and its processes, ensuring high quality and safety of food products. Today, NSF is the only center collaborating with the World Health Organization on issues of food safety and drinking water.

The certificate issued is the property of NSF International and may be revoked if discrepancies with standards are found during an audit. This mechanism ensures continuous compliance with requirements at CLOVER production sites, particularly in the production of water coolers.

NSF International certification guarantees that the quality of products, production processes, packaging, and transportation comply with international standards. NSF's mission is to prevent the negative impact of production and enterprises producing it on the population and the environment. The organization develops quality standards, conducts educational activities, and carries out independent product testing worldwide. NSF certification is a guarantee of environmental safety and high quality of products and services.

NSF International was founded in 1944 and is one of the authoritative experts in the field of healthcare and environmental safety. It is accredited by the American National Standards Institute (ANSI).