Public Water Systems in Delaware: Full List (20)

Public water system	Population served
WILMINGTON WATER DEPARTMENT	107,976
NEWARK WATER DEPARTMENT	40,000
DOVER WATER DEPARTMENT	39,491
DEWEY BEACH WATER DEPARTMENT	31,000
REHOBOTH BEACH WATER DEPARTMENT	25,000
MIDDLETOWN WATER DEPARTMENT	17,700
CAMDEN PUMP DISTRICT	17,208
BETHANY BEACH WATER DEPARTMENT	12,000
SMYRNA WATER DEPARTMENT	11,813
DOVER AIR FORCE BASE	11,000
MILFORD WATER DEPARTMENT	9,800
LEWES BOARD OF PUBLIC WORKS	9,627
MILLSBORO WATER DEPARTMENT	8,568
GEORGETOWN WATER DEPARTMENT	7,259
SEAFORD WATER DEPARTMENT	6,699
MUNICIPAL SERVICES COMMISSION	5,549
CAMDEN WYOMING SEWER AND WATER AUTHORITY	5,000
LAUREL WATER DEPARTMENT	3,984
HARRINGTON WATER DEPARTMENT	3,562
SELBYVILLE WATER DEPARTMENT	3,502

Largest first by population served, as each employer reports it to its federal registry.

Source: U.S. Environmental Protection Agency, Safe Drinking Water Information System (SDWIS/Fed), community water systems. Data captured October 2, 2026.

Jobs at public water systems