On a weekly basis during mosquito season, usually from June through October, mosquito “landing rate” counts are conducted in the 30 zones making up the island. From these counts, the areas of the island that will be sprayed that week are determined. Spraying is then carried out using a fogger mounted in the back of a pickup truck. This is typically done towards the end of the week between the hours of 4 and 6 a.m.
The map below shows the various zones throughout the island where spraying is conducted.