EU Drinking Water Directive: A noble goal, but flawed execution?

The EU Drinking Water Directive aims to ensure the highest standards of safety and hygiene in drinking water supplies across Europe. However, according to Volker Krings, chief chemist at Germany’s rubber industry association WDK, the directive’s implementation has been poorly executed. Krings argues that elastomers—rubber-like materials used in seals, gaskets, and other components that come into contact with drinking water—are critical to maintaining water quality and preventing contamination. Over the decades, both consumer expectations and regulatory demands have evolved, pushing stricter requirements for these materials. Standards set by national, European, and international bodies define the mechanical properties and service life of elastomers used in plumbing and water supply systems. The directive’s emphasis on preventing even trace amounts of substances from migrating into drinking water reflects a precautionary principle, given the potential for lifelong exposure. Yet, Krings contends that the directive’s current framework fails to adequately address the practical challenges faced by manufacturers and suppliers of elastomeric materials. The directive’s broad scope includes metals, glass, ceramics, plastics, and elastomers, but Krings suggests that the execution lacks the precision needed to balance safety with feasibility. The article highlights the tension between aspirational goals and the realities of material science, regulatory compliance, and industry adaptation. While the directive’s intent is clear—protecting public health by minimizing contamination risks—its implementation has left stakeholders grappling with unclear guidelines, inconsistent enforcement, and a lack of harmonized standards across member states. The result, Krings argues, is a directive that is conceptually sound but operationally flawed, leaving both manufacturers and consumers in a state of uncertainty.