Middlesex Water Company is a water utility company. The Company owns and operates regulated water utility and wastewater systems primarily in New Jersey and Delaware. It also operates water and wastewater systems under contract on behalf of municipal and private clients primarily in New Jersey and Delaware. The Company operates through two segments: Regulated and Non-Regulated. The Regulated segment is engaged in the business of collecting, treating and distributing water on a retail and wholesale basis to residential, commercial, industrial and fire protection customers in parts of New Jersey and Delaware. The Non-Regulated segment primarily consists of non-regulated contract services for the operation and maintenance of municipal and private water and wastewater systems in New Jersey and Delaware. The Company's subsidiaries include Tidewater Utilities, Inc. (Tidewater), Pinelands Water Company, Utility Service Affiliates, Inc. and Utility Service Affiliates (Perth Amboy) Inc.