If you find insects in your apartment, you can use the information and images on this site to identify and prevent pests. Identification is not always even necessary, as the same pest extermination instructions apply to different insect pests.
Helsinki's environmental services do not have a pest extermination service and do not sell pesticides. You can buy insecticides from places such as hardware stores, department stores and garden stores. Contact information for pest extermination businesses can be found online with the pest control keyword, for example.
For questions related to indoor parasites such as bed bugs, you can contact the housing health advisory service.