An adequate level of urban services and infrastructure to accommodate anticipated future development either is available, or can reasonably be made available. An adequate level of urban services shall be defined as: municipal sanitary sewer, storm drainage, and water service meeting the requirements enumerated in the Brookings public facilities plan and the land development code for provision of these services. The adequacy of these services shall be considered in relation to annexation proposals. If any substandard infrastructure exists within the boundaries of the area proposed for annexation, the city may deny an annexation application.