Routine surveillance helps the District monitor mosquito abundance and mosquito borne diseases throughout the district. Mosquito surveillance provides the critical data for the District to make decisions on control measures and to assess the effectiveness of its control methods in high-risk areas.

The District concentrates on controlling mosquitoes when they are in the immature aquatic stage because larval control has several benefits. The pesticides used to control mosquito larvae are less toxic to the environment and are highly specific to mosquito larvae and, therefore, do not affect beneficial insects, fish, birds or other mammals.

If you are spending time outdoors when mosquitoes are active (especially at dawn and dusk), apply insect repellent according to label directions.