NSF Launches Protocol 534 to Address Critical Gap in EU Drinking Water Directive Compliance

Brussels, Belgium – NSF, an independent global services organization, is proud to announce the launch of NSF Protocol 534 (P534), a groundbreaking solution designed to address a critical gap in the European Union’s Drinking Water Directive (EU DWD) 2020/2184. This new protocol provides a clear pathway for manufacturers of pre-products, ingredients, and raw materials to validate their compliance with the EU’s harmonized drinking water standards ahead of the January 1, 2027, application date.

The EU DWD requires that all products in contact with drinking water must be tested, assessed for conformity, and certified by an independently accredited and notified third-party, like NSF. However, the directive does not include provisions for raw materials used in final drinking water products, including evaluating formulations, pre-products, intermediate products, and site-applied products, which encompass essentially all raw materials used in the production of final drinking water products.

“Through our ongoing dialogue with industry stakeholders, we identified a significant challenge for manufacturers as they prepare for the 2027 EU DWD implementation,” said David Platt, Director of Water, EMEA, NSF. “While final products require certification, the directive creates uncertainty for the supply chain by not addressing the pre-products and raw materials that ultimately determine a final product’s compliance. Protocol 534 fills this critical gap, providing manufacturers with a clear path forward.”

NSF Protocol 534, titled “Evaluation of Pre-products, Formulations and Intermediate, Constituent, Site-applied products in Connection with the European Drinking Water Directive,” is designed specifically for pre-products in the EU. The protocol evaluates formulations, masterbatches, granulates, and intermediate products, such as epoxy resins for coating, as well as onsite-applied products, against the stringent requirements of the EU DWD.

The new protocol addresses three key challenges currently facing manufacturers:

• Time-to-market pressures caused by the need to provide extensive data on all ingredients, requiring ingredients to undergo multiple rounds of testing.
• Supply chain vulnerabilities stemming from limited supplier options and increasing compliance risks.
• Regulatory uncertainty surrounding the complex requirements of the EU’s harmonized standards.

“P534 represents a strategic advantage for both pre-product suppliers and product manufacturers,” Samantha Duffy, Senior Manager, Global Water Programs EU and UK at NSF, explained. “For ingredient manufacturers, it safeguards their market presence in the EU while providing added value to their customers. For product manufacturers, using P534-certified materials significantly streamlines the certification process for their final products, reducing both time and costs.”

Products certified under NSF P534 will be prominently listed on the NSF website, which is regularly consulted by purchasing departments seeking compliant materials. NSF ensures that confidential information remains protected, only disclosing technical details to downstream certifiers with prior approval from the certificate owner.

“In today’s environment of geopolitical tensions and supply chain disruptions, P534 offers manufacturers a resilient, reliable solution,” added Duffy. “By certifying pre-products now, companies can position themselves advantageously for the harmonized European market while demonstrating their commitment to quality and safety through third-party verification.”

Certification testing to NSF Protocol 534 is available immediately. Manufacturers of pre-products, ingredients, and materials used in drinking water applications can learn more about the certification process through our website or by contacting their dedicated account manager.