Post disaster sanitary and hygiene efforts need to create an environment where vector breeding and nesting sites and the opportunity for vectors and human contact are removed or reduced to a level which makes the disease threat of vectors inconsequential. This short note on Reducing Environmental Impacts of Vector Control Chemicals in Emergencies provides guidance to personnel in the field on how to effectively limit the impact of vectors, as well as the environmental impact of chemical control measures which are often used in vector control.