Management of recreational water development is based on knowledge of local recreational practices, resources and demand. Non-resort inland regions are very specific. In those of them, where the space is large and the sphere of recreation is underdeveloped, it is impossible to measure the real values of these indicators in situ and in monetary terms. In this study is shows how to conduct a non-monetary assessment of ecosystem services (ESs) in atypical conditions of recreational water use (RW). To solve the problem in Siberia, an approach is proposed to assess the degree of satisfaction of the demand for water recreation by ecosystem proposals of the territory from the point of view of donor capabilities of the environment and its sustainability. Demographic and economic statistics, sociological Analytics, standards of permissible anthropogenic load on ecosystems are used as initial quantitative data for the calculation of supply and demand. The availability of recreational ESs is estimated in relative terms (percent) and shows the share of the resource potentially used by consumers from the available ecosystem supply. In three river basins with different socio-economic conditions and ecosystem proposals, a wide diapason of availability was revealed: 0.3-72.0% – on the coast and 1.0-369.1% – on the water area. Peak values indicate a high potential for land-use conflicts and help identify areas for deeper analysis. The method is suitable for any other region, regardless of natural, social and economic conditions.