In general, the answer is no. Our two larvicides, Bti and methoprene, pose no danger to people, pets, or wildlife, even if they drink the water. Of course, for extra safety, children and animals should be kept clear while we are making a treatment. People may be concerned that because we are killing mosquito larvae and adults, we might be depriving wildlife such as ducks and bats of their food. Animals such as ducks and bats do not rely on a single source of food, and will frequently switch diets during the year as different foods become plentiful.
As for adult mosquito spraying, the pyrethroids used by TMAD pose no measurable health risk to humans and animals, but are toxic to fish and bees. Therefore, we do not spray near water or blooming crops. Permethrin is only applied to dense vegetation where mosquitoes rest during the day, and resmethrin is applied as a fog during the evening when mosquitoes are active but bees are not. All of our materials are registered for use in Louisiana and are among the safest available. As professional applicators, we take pride in only making a treatment when necessary, following label directions, and minimizing the potential impacts on non-target species. We live in this area and enjoy the outdoors too, so we take a personal as well as professional interest in protecting the environment.