Even before the latest attacks, oil product levels in the Taganrog Bay were exceeding the maximum permissible concentration, according to the Rostov Region Ministry of Natural Resources.

According to fresh issue "Ecological Bulletin of the Don", published by the Ministry of Natural Resources of the Rostov Region, in the summer of 2025 in certain places Taganrog Bay of the Sea of ​​Azov The maximum permissible concentration (MPC) for petroleum products was exceeded by up to 2,8 times. 

On average, the concentration of petroleum products throughout the bay was 0,016 mg/dm³, which is below the maximum permissible values, but higher than in 2024 (0,009 mg/dm³). 

Measurements were carried out before latest attacks UAV on Taganrog.

At the end of July, shortly after the fire in the Taganrog port, the mayor of the city Svetlana Kambulova published data showing that the water in the Taganrog Bay is within normal limits, and on the shore not detected fuel oil. City residents were outraged and sent her photos of oil clots. 

Meanwhile, scientists from the Institute of Biology of the Southern Seas and the Southern Scientific Center of the Russian Academy of Sciences have found hydrocarbon levels in the waters of Taganrog Bay that exceed the maximum permissible concentration by up to 5,4 times in some places.