10.4122/1.1000001139 Rutsch, M. Rieckermann, J. Krebs, P. Quantification of sewer exfiltration - a review DTU Library, Technical University of Denmark (DTU) 2005 Sewer leakage exfiltration groundwater recharge rehabilitation management Dresden University of Technology, Institute for Urban Water Management Swiss Federal Institute of Environmental Science and Technology en Conference presentation 10.4122/1.1000001140 text/xml 1 One of the goals of the APUSS project (Assessing Infiltration and Exfiltration on the Performance of Urban Sewer Systems) is to assess sewer exfiltration, in order to support cities and operators to define problem-oriented rehabilitation strategies. In this paper, we review various methods currently used for the estimation of exfiltration and discuss data needs and applicability for rehabilitation planning. Although, each approach has its individual advantages and drawbacks, we identified pressure tests and tracer methods to have the highest potential for decision support in rehabilitation planning. With regard to future challenges (e.g. micro pollutants) such methods might play a key role in integrated sewer management.