EU DWD – EU Drinking Water Directive

The EU DWD (Drinking Water Directive), Directive (EU) 2020/2184, is the European Union’s directive on drinking water. It replaces the former Directive 98/83/EC, sets requirements for drinking water quality and obliges member states to transpose them into national law. In Germany, this is done through the Drinking Water Ordinance (TrinkwV).

What is new in the EU DWD?

For the first time, the directive provides for uniform EU-wide requirements for materials that come into contact with drinking water. These include European positive lists of the starting substances that may be used in organic materials such as elastomers. The uniform material requirements are expected to apply from January 2027.

What does this mean for seals?

All seals in fittings, pipes and appliances of drinking water installations are affected:

• Sealing rings and O-rings in fittings, valves and filters
• Moulded parts such as diaphragms and sleeves
• Hose rings and profiles in water-carrying systems
• Flat gaskets and punched parts

The formulation must comply with the European positive lists. The mechanical requirements for the material, for example to EN 681, continue to apply as well.

EU DWD and KTW-BWGL

In Germany, elastomers in contact with drinking water are assessed according to the KTW-BWGL of the German Environment Agency. It has been mandatory for elastomers since 1 July 2026 and replaced the former Elastomer Guideline. The EU DWD adds uniform European requirements.

EU DWD at SIEGEL

Our EPDM blue is drinking water compliant and already meets the positive list of the upcoming EU DWD. An overview of all drinking water applications can be found under drinking water. We are happy to check the requirements for your application.