It limits at the north with the Province of Tacna in Peru ; at the south with the Province of Tamarugal , in the Region of TarapacÃ ; at the east with the Province of Parinacota ; and to the west with the Pacific Ocean . The province is bordered on the north by the Tacna Province of Peru , on the south by the Tamarugal Province in the TarapacÃ Region , on the east the Parinacota Province and on the west by the Pacific Ocean .