Welcome to EUREAU

EUREAU is the voice of Europe’s drinking water and waste water service operators which collectively provide water services to more than 400 Million people. Both, the private and the public sector are represented.


Today, the organisation counts 30 members from 27 countries. The members are national associations from EU and EFTA countries.

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Internal flow

The internal flow is the total volume of river run-off and ground water generated in natural conditions, exclusively by precipitation within the country. The internal flow is equal to precipitation less actual evapo-transpiration and can be calculated or measured. According to UNSD, if the river run-off and groundwater generation are measured separately, transfers between surface and groundwater should be netted out to avoid double counting.