Middlesex Water
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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.

Water Quality

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

To view our latest water quality report, click here.

Customer Service Contact Information

In the event of an emergency, please call:

(877) 720-9272

For billing inquiries: (877) 720-9272 Hours of Operations: Monday through Friday 9 AM-5 PM

[email protected]

Business Address

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

Customer Service Correspondence

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


Meeting Customer Needs

The Company‘s employees live within the communities they serve, so they are readily available and sensitive to local needs. The Company works with landowners and developers to find solutions to their water and wastewater needs and is well-positioned to support the rapidly developing growth that is occurring in Southern Delaware. Tidewater's source of water supply is comprised exclusively of safe, drought-resistant and abundant groundwater sources, which have consistently earned high marks for taste and quality.

Tidewater has been honored with numerous awards including being honored with the  Best in the Business Award for medium-sized businesses numerous times. Other honors include the Better Business Bureau Torch Award for Marketplace Ethics, and the Best Tasting Water in Delaware by the Delaware Rural Water Association.

Tidewater's rates and financial matters are regulated by the Delaware Public Service Commission (PSC). Its service areas, water pumpage, well permits, production limits, etc. are regulated by the Delaware Department of Natural Resources & Environmental Control (DNREC). The company's operations are also overseen by the Delaware Health and Social Services (DHSS), Division of Public Health, and other government agencies.

Through Tidewater's subsidiary, White Marsh Environmental Systems, Inc., Tidewater is able to provide water and wastewater contract operations services. Tidewater Environmental Services, Inc. is an affiliated company providing regulated wastewater utility services to developers and customers.


Southern Shores Water Company LLC

Southern Shores primarily provides water service to approximately 2000 customers in Sea Colony Development in Sussex County, Delaware. The system is interconnected with the Bethany Bay District of Tidewater Utilities, Inc. to supplement demand for water as needed. Water supplied to Sea Colony customers is derived solely from groundwater from an Aquifer known as the Manokin Formation.