In implementation of this activity, experts from the Association “Technological Institute of Aquaculture” conducted a study / monitoring within a two-day tour in the period 24.06.2020 – 25.06.2020 and to check for sources of industrial pollution in the area of Ogosta River in Montana. The monitoring was carried out along the river after its outflow from Ogosta Dam, turning northeast and passing through the town of Montana, where it receives the waters of the Shugavitsa River on the right, as the river was studied during its water minimum – summer low water. For this purpose, experts of the Association “Technological Institute of Aquaculture” carried out a two-day detour along the Ogosta River in Montana to establish the existence of sources of industrial pollution. As a result of monitoring has revealed no sources of such pollution.