Local Water Guides

Delaware has only three counties, but county pages are hubs, not the endpoint. Use them to find the right lookup tools, then confirm your exact system or well context.

Important: A county is never one water system. These guides point you to Drinking Water Watch, major verified utilities, the DNREC Well Viewer, and local resources — they do not state a single result for the whole county.

County guides

New Castle County

Dense public-water service, Wilmington-area systems, and older housing lead-service-line context.

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Kent County

Groundwater, private wells, Dover-area public systems, and agricultural nitrate context.

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Sussex County

Private wells, coastal development, saltwater intrusion, and rapid growth.

View guide →

This directory includes county, incorporated-municipality, named-community, subdivision, and service-area discovery pages. Each page lists mapped PWS IDs and links to official Delaware records, while extracted report rows are shown only where a source can be reconciled to the system. A page is not an address-level service guarantee. If your community isn't listed yet, use the statewide Find Your Water System and Private Wells guides, then confirm the provider on your bill.

This page provides general educational information and is not regulatory advice. DelawareWaterQuality.com is an independent resource and is not affiliated with any county or municipal government.

Last reviewed: 2026-07-11. Report a correction.

Delaware county guides

Delaware community and subdivision guides

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