On July 27, 2016, the diver Bogomil Koynashki (BUL) was tested positive to the prohibited substance Carboxy-THC (Class S.8 Cannabinoids) following an in-competition doping control test conducted on the occasion of the National Diving Championships.
The Bulgarian Swimming Federation imposed a sanction of four (4) years’ ineligibility on the athlete starting on October 20, 2016.