The goal is to reduce water losses in the network and thus reduce the volume of surface water collected and the associated discharges. A global program was implemented including maintenance of the condensate return system and optimization of water uses. In addition, production facilities of makeup water for boilers were modernized. Nearly 50% of the makeup water comes from production lines of demineralization by ion exchange and 25% from reverse osmosis water units, thereby limiting the release of suspended solids and reduction of at least 8% of boilers blowdown.