NSW Health administers the NSW Arbovirus Surveillance and Mosquito Monitoring Program (ASMMP) each year. The aim of the ASMMP is to detect key arbovirus activity and monitor vector populations across NSW to inform public health communications. This surveillance provides an early warning of increased arboviral risk. From spring to autumn of each year, the ASMMP monitors the presence of arboviruses in the environment through the trapping of mosquitoes for virus isolation, species type and abundance and the detection of arbovirus antibodies in sentinel chicken flocks.

This dataset includes detections of all arboviruses in trapped mosquitoes by location, local government area and local health district by the week ending Saturday (epidemiological week) from 1989 onwards. Arboviruses that are considered high risk include Ross River, Barmah Forest, Murray Valley encephalitis, Kunjin and Japanese encephalitis viruses.