The concentration of particulate matter (PM) in the small lakes varied from 1 to 14 mg/l. The lowest content of particulate matter was found in Golubichnoe Lake, 2–4 mg/l, and it reached as high as 11 mg/l in Vaskovskoe Lake. The content of particulate matter increased in all lakes in the bottom layers due to its subsidence. In Vaskovskoe Lake, which is the deepest lake, the smallest content of particulate matter was recorded in the middle of vertical profile (3 m). The quantity of particulate matter depends on the hydrological regime, the type of the drained soil, rock composition and geomorphology of the catchment. Apparently, the contribution of the latter was the most significant factor for Vaskovskoe Lake: during the extreme high water conditions in 2013, the content of suspended matter in the water doubled (compared to the average) thanks to the steep ridges limiting its catchment from the west and east.