Malaria risk, predominantly in the malignant falciparum form, exists throughout the year in the whole country except at altitudes above 2000m and in desert areas. Chloroquine resistance has been reported. Water used for drinking, brushing teeth or making ice should have first been boiled or otherwise sterilised.
Bottled water is available and, it is advised, is safe throughout Oman.
Food bought in the main supermarkets can be regarded as safe. Outside the capital area, milk may be unpasteurised and if so, should be boiled. Powdered or tinned milk is available and is advised, but make sure that it is reconstituted with pure water. Avoid dairy products which are likely to have been made from unboiled milk. Only eat well-cooked meat and fish, preferably served hot.