EU Drinking Water Directive (DWD)

The EU Drinking Water Directive (DWD) establishes harmonised requirements for materials and products in contact with drinking water across European member states.

However, implementation remains complex, with evolving requirements and practical interpretation influencing how compliance is achieved in practice.

A structured approach ensures requirements are clearly defined, supporting on-time project delivery and enabling alignment across multiple markets.

What is the EU Drinking Water Directive?

The EU Drinking Water Directive (EU) 2020/2184 sets out requirements to ensure materials and products used in contact with drinking water do not adversely affect water quality or pose a risk to human health.

The directive introduces a transition towards harmonised European requirements through the development of Minimum Hygienic Requirements (MHR), including positive lists, common assessment approaches and aligned testing methodologies.

Requirements are defined within the DWD / MHR framework, with certification and testing delivered through accredited certification bodies and designated laboratories.

Where the DWD & MHR Apply

The DWD and associated MHR framework apply to materials and products used in contact with drinking water across EU member states, particularly within public supply systems.

This commonly includes:

  • Components used within drinking water supply and distribution systems
  • Materials used in treatment, storage and delivery of potable water
  • Products requiring assessment through laboratory testing, as defined by relevant regulatory authorities and designated laboratories

Understanding applicability early is critical, particularly where requirements continue to evolve during the transition towards harmonisation.

Compliance & Approval Process

Compliance with the DWD / MHR framework requires alignment with both European-level requirements and national implementation schemes.

This typically involves:

  • Identification of applicable material or product categories
  • Alignment with relevant positive lists and substance requirements
  • Generation and review of supporting technical data and documentation
  • Laboratory testing and assessment, as defined within the framework and applied by certification bodies
  • Certification and approval through accredited certification bodies

Ongoing obligations may apply depending on product type and material categorisation, including testing, surveillance, reassessment or audit-based requirements to maintain certification.

How AquaCompliance Supports

AquaCompliance supports manufacturers through a structured, delivery-focused approach, helping manage DWD / MHR requirements from early-stage assessment through to approval.

  • Regulatory Pathway Definition — Clarifying how DWD and MHR requirements apply and identifying appropriate compliance routes across target markets.
  • Documentation Review — Assessing available technical information to identify gaps and opportunities to leverage existing data.
  • Laboratory Coordination — Liaising with designated laboratories to align capability, capacity and timelines.
  • Certification Body Engagement — Supporting communication with accredited certification bodies to progress approvals efficiently.
  • Commercial & Technical Alignment — Identifying overlap across materials, product ranges and markets to streamline testing strategies, reduce duplication and manage overall project cost.
  • Application & Project Management — Coordinating activities across internal teams, laboratories and external stakeholders to support delivery from initial assessment through to approval.

Key Considerations

Compliance with the DWD / MHR framework is influenced by several factors that should be considered early to avoid delays and rework:

  • Material composition and intended application
  • Availability and quality of supporting data
  • Evolving regulatory requirements during harmonisation
  • Laboratory capability, capacity and lead times
  • Certification body requirements and timelines
  • Completeness and accuracy of submissions

Additional factors can significantly influence testing scope, timelines and overall project cost:

  • Material surface area in contact with drinking water — A key factor influencing material categorisation and associated testing requirements under the DWD / MHR framework
  • Supply chain complexity — Including multiple material and component suppliers, which can increase coordination requirements and impact testing scope, cost and timelines
  • Approval status of materials and sub-components — Existing approvals may be leveraged, or gaps may require additional testing
  • Material categorisation and product type — May determine qualification requirements, including the need for manufacturing site audits and ongoing surveillance
  • Alignment of documentation across markets — Where accepted, this can support efficiency and reduce duplication

Testing requirements are defined within the DWD & MHR framework, applied by accredited certification bodies and implemented through designated laboratories.

Early alignment across certification bodies, laboratories and internal stakeholders supports project delivery and helps maintain progress throughout the approval process.

Related Requirements

DWD / MHR requirements are primarily applied within European regulatory frameworks and do not directly align with other international approval schemes.

While international frameworks such as Regulation 31 (Reg31) and North American NSF/ANSI standards (including NSF/ANSI 61 & 372 Certification) are not directly transferable, the technical data, material assessments and supporting documentation developed during DWD programmes can be structured to support wider global compliance objectives, reducing duplication, streamlining processes and improving efficiency.

A coordinated, multi-standard approach helps optimise testing strategies and improve efficiency across global approval pathways.

If you are planning EU market entry or alignment with evolving DWD requirements, early clarity on requirements and approach is critical.

AquaCompliance supports projects from initial assessment through to approval, helping identify gaps, streamline activities and maintain alignment across complex regulatory frameworks.

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