Surveillance

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.

Since adult mosquito populations can change markedly in response to various factors including water availability, temperature, and other environmental factors, the District deploys hundreds of traps and operates them weekly during the heavy mosquito season.

You may have seen one of these mosquito traps out in the community or your very own yard. We encourage you to leave the trap alone as it is helping us determine if there are mosquitoes present and if they are carrying any diseases in your neighborhood.

Gravid trap: This trap is baited with a fermented hay and yeast infusion. This trap attracts and collects female mosquitoes that are looking for a source to lay their eggs.

CO2 baited trap: This trap is baited with carbon dioxide. This trap attracts and collects female mosquitoes that are out looking for a blood meal.

BG-Sentinel trap: This trap is baited with carbon dioxide. This trap attracts and collects female mosquitoes that are out looking for a blood meal.

Autocidal Gravid Ovitrap (AGO): This trap is baited with a hay infusion. This trap passively attracts and collects female mosquitoes that are looking for a source to lay their eggs.