The Rivers of the Istra region are not only an invaluable asset to their inhabitants, but they are also one of the main water supply sources for the city of Moscow. A significant portion (up to 10 percent) of drinking water for the Russian capital comes from the rivers and the lakes of this region. Thus, it is of vital importance to maintain their environmental cleanliness. However, as human economic activity expands, the negative impact on natural sites, specifically on surface water, increases. Therefore, the protection of water quality becomes one of the critical issues associated with sustainable environmental management. Establishing water protection zones along rivers, lakes, and other bodies of water is one of the basic measures in addressing this issue.