Rainwater Harvesting and Mosquitoes

Rainwater harvesting techniques can be powerful tools for building sustainable landscapes and resilience against climate impacts. However, when rainwater harvesting infrastructure falls into disrepair or is designed improperly, it may inadvertently become mosquito habitat. This can turn a compelling adaptation strategy—retaining a precious resource—into a maladaptive one—creating habitat for disease vectors. This study sought to understand how different types of green stormwater infrastructure impacted mosquito populations in Tucson, AZ. Results suggested that larger basins may be maladaptive and can become suitable mosquito breeding habitats. In contrast, curb cuts and small basins designed to drain within 12 hours presented no mosquito production issues for rainwater harvesting. The project highlighted the importance of careful green stormwater design to avoid potential health risks.