The beach of Sunny Day was rated with the certificate "Blue Flag".
The Blue Flag Certificate evaluates beaches for their seawater quality, cleanliness, environmental friendliness, safety, services and facilities for tourists, nature protection, shore and coastal zone.
The campaign takes place in nearly 50 countries around the world and was launched in 1987 at the initiative of the Environmental Education Foundation and the European Commission.
The beach of the resort Sunny Day was the only blue flag beach near Varna in one of the last years.