This document reports on data availability and quality for hydrological modeling and water quality modeling in the Black Sea Catchments. The report gives an overview of different hydrological models such as Soil Water Assessment Tool (SWAT) that is our selected tool for hydrological modeling and water quality modeling in the Black Sea Catchments, followed by Delft3D a 2D/3D modeling program, SOBEK, MONERIS, and Qualitative Reasoning (QR) models. The main hydrological projects developed in the regions are also described in order to benefit from existing modeling data suitable also for SWAT model. In the partners' contribution chapter, each partner gives an overview of meteorological, hydrological and other SWAT data it can contribute or may be collected from the official owners. It is concluded that Ukraine, Romania and Hungary territory is well covered with SWAT needed data from enviroGRIDS partners, other data for the rest of the area as upstream of Danube Catchments are mostly available through ICPDR or at Global, European and regional database repositories.