Although recognized by the water utilities as an important cause for the systems' functional performance deterioration, with reflexes on the provided service quality, the fact is that undue inflows' real dimension is often unknown and a structured process to address this is still not internalized in most utilities.

PENSAAR 2020, the Portuguese National Plan for the period 2014-2020, framed the needs for action in the water sector in Portuguese mainland. Since then, the national strategy was no longer focused only on the construction of new infrastructure, but also on improving asset management and the provided service quality, in a sustainability comprehensive perspective. The control of undue inflows was clearly identified as an objective to be achieved.

In this context, LNEC promoted iAFLUI, the National Initiative for the Control of Undue Inflows, which started in 2016 with its first edition, and continued in 2019 with its on-going second edition. iAFLUI contributes to the implementation of PENSAAR2020, through the dissemination of a methodology for the control of undue inflows and the corresponding capacity building of national water utilities.