 The ordinance would require new City of Wilmington employees to reside in the city for at least five years, but the residency issue is still being resolved with unions that represent city workers. Mark Fouser, WDEL, Delaware's News Radio. Customers served by Wilmington water may notice an earthy taste and odor in drinking water from the tap. That's due to algae growth in the system's water source brought on by recent weather conditions.