In this report technical pre-treatment methods, which can be combined with MAR treatment to guarantee the requested water quality, are explained and evaluated. A description of existing MAR systems in Europe gives an overview of pre- and post-treatment technologies applied today.

Possible pre-treatment steps and their removal efficiencies for contaminants of main concern as well as removal efficiencies in the MAR are listed. This list may be used for the selection of appropriate pre-treatment steps for different MAR types.