Mental & physical health

Mosquito control

Throughout mosquito season, the City sets mosquito traps to test if any of the mosquitoes are carrying diseases and to see where we should work to reduce their numbers. We also apply larvacide, a compound that keeps mosquito larvae from growing into adults, to more than 40,000 stormwater inlets.

Sometimes, if mosquitoes get bad enough in a particular area, we may spray mosquito pesticide to kill the fully grown mosquitoes. We only use pesticides approved by the Environmental Protection Agency (EPA) to fight mosquitoes. We do not use DDT.

Species that carry Zika

Aedes aegypti, the main type of mosquito responsible for the Zika outbreak, is not currently found in Philadelphia. A related mosquito, Aedes albopictus, is found in Philadelphia, but it can’t pass infections to humans as well as Aedes aegypti does.

Our routine mosquito trapping helps to track where Aedes albopictus mosquitoes are in the city and to prevent and reduce problems from this type of mosquito. Our monitoring will also let us know if Aedes aegypti, the mosquito causing the Zika outbreak, has moved into Philadelphia.

Control mosquitoes at home

Mosquitoes lay their eggs in standing water. You can help prevent mosquito populations from growing by draining or covering sources of standing water around your home.

Common backyard mosquito sources


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