Relevance. Studies of the oil and gas potential of the eastern rim of the Siberian Platform have been conducted since the beginning of the 20^th century, however, so far this territory has been studied extremely poorly. The bulk of the work was concentrated in the Vilyui River basin, while the adjacent territories on the right banks of the Lena and Aldan rivers remain noticeably less studied. Information on the geochemistry of natural waters in this area is extremely sparsely presented in open sources, and the content of a number of organic compounds (benzene, toluene), used as a direct indicator of oil and gas potential, is completely absent. The identification of new promising oil and gas accumulation zones and the expansion of the hydrocarbon potential of Eastern Siberia will contribute to the development of industry and the achievement of national goals for the development of the territory of Yakutia, which is of great economic and geopolitical importance. Aim. To analyze benzene and toluene prevalence in the natural waters of the eastern rim of the Siberian Platform and substantiate their role in assessing oil and gas potential. Methods. Analytical studies on the determination of aromatic hydrocarbons (benzene, toluene) were performed at the testing laboratory center of the Center for Hygiene and Epidemiology in the Novosibirsk Region on a Crystal-2000M gas chromatograph, using an accredited equilibrium vapor method with a sensitivity of 0.001 mg/l. Results. The paper provides extensive factual material on the content of aromatic hydrocarbons (benzene, toluene) in the natural waters of the basins of the Hamna, Allah Yun, Vostochnaya Khandyga, Tompo, Lyapiske (Lampushka) and Sobolokh-Mayan rivers (Sobopol). The obtained first hydrogeochemical material is largely of a reconnaissance nature, however, it indicates good prospects for the oil and gas potential of the studied area.