The janitorial service industry is a service industry. It includes the provision of cleaning and maintenance services for businesses and other organizations.

There are a few different industries that a janitorial service could fall into. One option would be to provide services to businesses, such as offices or factories. Another option would be to work in the residential sector and provide cleaning services for people's homes. A janitorial service could also choose to focus on specialized areas, such as cleaning up after events or providing pest control services. Ultimately, the specific industry that a janitorial service falls into will depend on the specific services that it offers and the target market it is trying to reach.