Zagrebačke otpadne vode d.o.o. (ZOV)/ Zagreb wastewater Ltd./ founded in Zagreb in 1998, is responsible for design, financing, construction and operation of the Central wastewater treatment plant Zagreb (CWWTZ) and related infrastructure.
The CWWTZ project is the first concession for a wastewater treatment plant in Croatia that enabled the City of Zagreb to harmonize and be in compliance with the environmental standards of European Union in the field of environmental and water protection. Pursuant to the Concession Agreement between the City of Zagreb and ZOV, ZOV designed and completed the construction of CWWTZ in 2007, and now, through its sister company Zagrebačke otpadne vode-upravljanje i pogon d.o.o./Zagreb wastewater-management and operation Ltd. is responsible for the management and operation of the facilities and regular maintenance.
ZOV is owned by a consortium consisting of WTE Wassertechnik GmbH (WTE) from Essen, innogy Aqua GmbH from Mülheim and city company Vodoprivreda Zagreb d.d. (VZ)/Water Management Ltd.
WTE, the main partner in this project, is a daughter company of the Austrian group EVN AG, the largest company in the field of water supply and wastewater treatment in Lower Austria. The main activity of WTE is design, construction and management of waste water treatment plants, drinking water treatment plants, thermal waste treatment and heat and power production plants , both in Germany and abroad.
Innogy Aqua company within the innogy SE Group holds interests in RWW (Rheinisch-Westfälische Wasserwerksgesellschaft mbH), IWW (Rheinisch-Westfälisches Institut für Wasserforschung) and the Central for wastewater treatment plant of the city of Zagreb.
VZ ( Vodoprivreda Zagreb d.d.) as the Croatian founder company deals with the maintenance of natural waterways and groundwater in the city of Zagreb, restoration and water management and water protection. VZ ( Vodoprivreda Zagreb d.d.) is also responsible for the protection and monitoring of the Sava River.