The purpose of water monitoring is to study the condition of surface water and groundwater. The results are evaluated and if necessary, measures are proposed aiming at achieving a good water condition or good ecological potential – see Water Planning. In the next step, the monitoring is used for inspecting the effectiveness of the measures implemented.
The majority of the waters are monitored in compliance with Directive 2000/60/EC of the European Parliament and of the Council of 23 October 2000, establishing a framework for Community action in the field of water policy (the Water Framework Directive). However, there are exceptions, such as the drinking water from end consumers’ taps. In the case of surface waters, the chemical condition (so-called priority substances) and the ecological condition (biological components, hydromorphology, and certain physical and chemical parameters) are monitored. The quantitative and chemical conditions are monitored for groundwater.