According to the Program for the determination of sea quality at the beaches of the Dubrovnik-Neretva County for 2020, the Public Health Institute of Dubrovnik-Neretva County carried out the fifith regular sea research on 120 beaches.

Out of a total of 120 beaches, the sea at 117 beaches was rated as a sea of excellent quality, while the sea at the beaches Prozura at Mljet and Sreser at Peljesac was rated as good, and the sea at the beach of Sveti Nikola on the island of Korcula was marked as satisfying.