The City of Prospect Heights maintains the sanitary sewer system from along Wolf road to the west of the City. These areas consist of the former Old Town Sanitary District and Special Service Areas 1, 2, 3, and 4. Effective April 1, 2017, the City will no longer levy a special property tax assessment for the properties within Special Service Areas 1, 2, 3, and 4 for sanitary sewer service. These properties will receive a quarterly bill for sanitary service the same as the other customers from the former Old Town Sanitary District.