The joint project "Young Cities - Developing Energy Efficient Urban Fabric in the Tehran-Karaj region" was led by the TU Berlin and was part of the BMBF-funded research program "Research for Sustainable Development of the Megacities of Tomorrow". The project developed exemplary solutions for the growing Tehran-Karaj region in Iran. inter 3 - Institute for Resource Management led the action dimension "Water and Wastewater Management" within the joint project and was responsible for the development of sustainable solutions for water supply and wastewater disposal in the region. The document summarizes the results of the work package "Water consumption management: consumption patterns and efficiency of water saving measures". The work package aimed to identify ways to reduce water consumption in households without loss of living comfort. The challenge, however, was that consumption patterns in Iranian households were virtually unknown. The project team therefore decided to conduct detailed consumption measurements in test households, which would allow the water consumption of a household to be divided according to its end use. Since privacy at home is very important in Iran, it was necessary to develop a largely non-intrusive method for such measurements. Therefore, a measurement approach based on the "Flow Trace Analysis" (FTA) method was developed. The FTA method consists of a single data logger connected to the household's main water meter. The data logger continuously records the flow rate, which can subsequently be divided into the individual end-use points (shower, washing machine, etc.) based on characteristic features of the flow curve. The concept was implemented and tested in three test households. The first impressions of water consumption patterns in Tehran households are discussed.