New EU Guidelines for Drinking Water Safety

Understanding the New Guidelines

The updated guidelines, detailed in the DWD Guidance Volume I, focus on the methodologies for testing starting substances, compositions, and constituents intended for use in materials that come into contact with drinking water. These guidelines are part of the broader effort to ensure that all materials meet stringent safety standards before being included in the European positive list (EUPL).

Key Changes and Requirements

The guidelines introduce comprehensive testing methodologies, including the assessment of physico-chemical properties, toxicological data, and migration potential of substances. A significant emphasis is placed on identifying relevant chemical species and assessing their potential risks to human health. The guidelines also require detailed reporting of the intended use of substances, including their technical function and concentration in materials.

Focus on Safety and Compliance

The guidelines mandate that all toxicological data be submitted in a robust study summary format, ensuring that the information is sufficient for conducting risk assessments. The ECHA requires that at least one key study or an acceptable adaptation rule be provided for each standard information requirement. This ensures that all materials are thoroughly evaluated for safety before approval.

Implications for Manufacturers

Manufacturers seeking approval for their products must adhere to these guidelines, which include submitting detailed applications to the ECHA. The applications must cover the identity, composition, and intended use of the substances, along with any existing EU or national-level authorisations. This process ensures transparency and accountability in the approval of materials used in drinking water systems.

Addressing Non-Intentionally Added Species (NIAS)

The guidelines also address the issue of non-intentionally added species (NIAS), which may form during the processing or use of materials. Manufacturers are required to identify and report any NIAS that might migrate into drinking water, ensuring that all potential risks are assessed and mitigated.