The activities of Hrvatske vode is water management within the limits of the following tasks:
Preparation of the draft Water Management Strategy, preparation of the draft River Basin Management Plan, preparation of the draft long-term construction programmes, enactment of detailed plans and programmes accompanying the River Basin Management Plan, preparation of the draft financial plan and enactment of the Water Management Plan; studies and analytical tasks - preparation of terms of reference, conceptual solutions, studies and investment programmes and review of design documents, with the exception of control of final designs in terms of regulations on physical planning and construction;
Monitoring and establishing hydrological conditions (including monitoring, collection, control, processing, keeping and publication of hydrological data, analysis of the hydrological regime, forecasting extreme hydrological events, floods and droughts), assessment of flood risks, monitoring the status of watercourses and status of water regulation and protection facilities; investment tasks in the construction and maintenance of water regulation and protection facilities; supervision of construction and maintenance of water regulation and protection facilities; management of flood risks; management, supervision and implementation of preventive, regular and emergency flood defence;
Investment tasks in the construction and maintenance of basic amelioration drainage facilities, supervision of construction and maintenance of basic amelioration drainage facilities;
Determining water reserves, care for strategic water reserves, water research works, giving opinions on implementing regulations adopted pursuant to the Water Act by local and/or regional self-government units; taking other measures for the intended and rational use of water; co-financing construction of public water supply facilities and supervision of purposeful use of funds during construction,
Management of water quality, implementation of monitoring of surface waters, including the coastal water, and groundwater, including laboratory tasks during monitoring, implementation and supervision of implementation of other bodies under obligation to implement the National Plan of Measures for Sudden and Accidental Pollution, giving opinions and exceptionally approvals on implementing regulations adopted pursuant to the Water Act by local and/or regional self-government units, co-financing construction of public wastewater collection facilities and supervision of purposeful use of funds during construction,
Management of projects of construction of irrigation facilities in the ownership of regional self-government units in accordance with national programmes and projects, co-financing construction of irrigation facilities in the ownership of regional self-government units;
Keeping water documents and Integrated Water Information System and issuing water rights documents pursuant to the Water Act
Expert tasks for the purpose of awarding concessions for the commercial use of waters
Expert supervision of implementation of conditions from water rights documents and concession conditions (water supervision);
Calculation and collection of concession fees for the commercial use of water
Calculation and collection of water fees pursuant to the Act regulating financing of water management
Management of special projects specified by law, a decision of the Government of the Republic of Croatia or the Management Board of Hrvatske vode,
And other tasks under the competence of Hrvatske vode pursuant to the Water Act, other act and the Charter of Hrvatske vode.