Specialists from the State Environmental Supervision of the Leningrad Region investigated the Luga River following reports from residents about dead fish. The investigation, prompted by citizen complaints, suggests that the fish die-off may be linked to oxygen deficiency in the water.

Preliminary findings indicate that high air and water temperatures, combined with plant decomposition, have contributed to a natural reduction in oxygen levels in the river. The regional administration’s press service released these details on July 30.

During their inspection in the Luga district, environmentalists observed a limited number of deceased fish near the shoreline, specifically in areas where water was stagnant. Crucially, the inspection revealed no visible signs of pollution, unusual smells, or chemical discharges into the river.

The State Environmental Supervision Department had previously investigated the Luga River between July 23 and 26, after “Fontanka” readers reported seeing dead fish. That initial investigation also found no evidence of human-caused or industrial pollution.