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State utility hub
Browse the indexed community water systems in this state. Each profile brings the provider’s payment routes and household protection policies into a single, practical guide.
Municipal Department
Service area: Wilmington and Northern New Castle County
Population: Approximately 110,000 drinking-water customers; the wastewater system treats service-area flows for approximately 450,000 residents in Wilmington and Northern New Castle County.
Private Investor-Owned Utility
Service area: New Castle County and Artesian Water service areas in Delaware
Population: 231,114 people (EPA SDWIS PWS ID DE0000552; 2026 active CWS record).
Municipal Department
Service area: Wilmington and qualifying outside-City water-service areas
Population: 107,976
Private Investor-Owned Utility
Service area: Rehoboth Pump District in Sussex County, including Tidewater service territory
Population: 81,417 people
Public Water Authority
Service area: Bethany Beach Pump District
Population: 51,000 people (EPA SDWA queue estimate for DE0000221)
Public Water Authority
Service area: Dewey Beach
Population: 31,000 people (EPA SDWA queue estimate for DE0000825)
Municipal Department
Service area: Rehoboth Beach
Population: 25,000 people (EPA SDWIS 2026Q2 estimate for DE0000723)
Private Investor-Owned Utility
Service area: Sussex County
Population: 18,215 people (EPA SDWIS 2026Q2 estimate for DE00A0323)
Private Investor-Owned Utility
Service area: WILMINGTON
Population: 100495 people (EPA SDWIS 2026Q2 active CWS estimate for DE0000564)
Private Investor-Owned Utility
Service area: Service area listed in EPA SDWIS
Population: 81417 people (EPA SDWIS 2026Q2 active CWS estimate for DE0000991)
Municipal Department
Service area: NEWARK
Population: 40000 people (EPA SDWIS 2026Q2 active CWS estimate for DE0000630)
Municipal Department
Service area: DOVER
Population: 39491 people (EPA SDWIS 2026Q2 active CWS estimate for DE0000571)
Delaware directory notes
This state hub brings together 12 indexed community water systems, from city departments and public authorities to investor-owned systems and smaller regional providers. A service area may cross municipal boundaries, so use the provider name and service address on your bill when choosing a profile.
The most important distinction is between a directory listing and an official account channel. Water Ledger provides a structured starting point; the utility’s own payment portal, published rate schedule, customer-service office, and mailed notice control your account. Compare the payment route, billing frequency, emergency number, and customer-protection notes before relying on a page for a time-sensitive decision.
If you are helping a household with a high bill, leak, or delinquency notice, open the utility profile and review the payment, shut-off, and leak-adjustment guides together. Keep the bill, account number, confirmation receipts, repair records, and notice dates available when speaking with the provider.