Tidewater Utilities, Inc.

Tidewater Utilities serving Delaware since 1964

Tidewater Utilities, inc.

Tidewater Utilities, Inc., (Tidewater), together with its wholly-owned subsidiary, Southern Shores, provides water services to approximately 45,000 customers for domestic, commercial and fire protection purposes in over 400 residential communities and commercial establishments in New Castle, Kent and Sussex Counties, Delaware.

Southern Delaware’s Premiere Water Company Since 1964

Established in 1964, Tidewater operates a combination of wells and water plants throughout its service area, which extends from lower New Castle County in the north of Delaware to Sussex County near the state’s southern border with Maryland. Headquartered in Dover, DE, Tidewater Utilities is the largest private water supplier south of the Chesapeake & Delaware Canal.

View our Capabilities Brochure >

View Tariff Effective July 1, 2018 >

Water Quality

Tidewater has a stringent water quality monitoring and testing program to ensure drinking water that meets and consistently exceeds state and federal water quality standards. The Company provides information on its water quality results to customers through Annual Water Quality Reports to customers.

View Tidewater’s Water Quality Report >

We strive to improve the quality of life for our employees, our customers and the communities we serve.

Our Affiliated Companies

Tidewater Environmental Services, Inc.

Tidewater Environmental Services, Inc. (TESI), a Middlesex Water subsidiary, provides wastewater services to approximately 3,400 residential retail customers in Kent and Sussex Counties in Delaware. The PSC also regulates wastewater utility rates in DE. TESI has been operating wastewater treatment systems in Sussex County, DE since 2005 and continues to add and operate new facilities. The Company works closely with area developers and continues to build its wastewater franchise area to serve customer needs.

CPCN Information

A Certificate of Public Convenience and Necessity (CPCN) is an authorization issued by the Delaware Public Service Commission (PSC) for the delivery and/or provision of a public service to a designated area or parcel of land. To have your property included in our next CPCN water or wastewater application, please download and sign the petition below and return it to us by fax at (302) 734-9297 or email at [email protected]. If you have further questions about the CPCN process, please feel free to contact a member of the Planning & Development Department at 302-734-7500 ext. 1014, or by e-mail at [email protected].

Wastewater Service Petition >

Water Service Petition >

View Tariff Effective April 1, 2015 >

White Marsh Environmental Systems, Inc.

White Marsh Environmental Systems, Inc. (WMES), a wholly-owned subsidiary of Tidewater Utilities, operates water and wastewater systems under contracts that serve approximately 9,200 residential customers. WMES also operates systems associated with manufactured home communities, commercial processing plants, stores and government buildings. WMES utilizes professional, certified water and wastewater operators who operate and maintain these systems to ensure quality and efficiency. White Marsh is please to help organizations meet their short term needs through its Support Operations Services (SOS) team (see Fact Sheet).

Additional WMES Services

  • Water and Wastewater Contract Operations
  • Water and Wastewater System Inspections
  • Instrumentation Specification and Upgrades
  • Fire Hydrant Maintenance
  • Distribution System Leak Detection
  • Collection System Diagnosis
  • System Design and Build Options
  • Consultation Services
  • Storm Water Management
  • System Purchases
  • 24-Hour On-Call Emergency Response

For more information about White Marsh Environmental Systems, Inc. Contract Operation Services, contact Ray Ebaugh: email [email protected] or phone at 302-747-1312.

Sewer Pump Stations Construction Services >

Operational Efficiency Fact Sheet >

Instrumentation Upgrades Fact Sheet >

Support Operations Services Fact Sheet >

Service Alerts

There are no service alerts at this time.

Contact Us

General Inquiries:


Water Service Emergency:

Contact us at 877-720-9272 24/7, 365 days a year.

Hours of Operations:

Monday through Friday 9 AM-5 PM

Billing Inquiries:


Office Address:

Tidewater Utilities, Inc.
1100 South Little Creek Road
Dover, DE 19901

Customer Service Address:

Middlesex Water Company
1500 Ronson Road
Iselin, NJ 08830
Attn: Tidewater Utilities

Tidewater has raised more than $150,000 during the past decade for various nonprofit organizations through its annual charity golf tournament. Nonprofits wanting to be considered as a beneficiary must complete an application.