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Delaware Environmental Navigator (DEN)



The Delaware Environmental Navigator - DEN - is a dynamic database of the Delaware Department of Natural resources and Environmental Control – DNREC – that brings together core environmental information into one place where it is easily accessible to those within DNREC and the public. This system allows users to easily answer questions and concerns about the environment such as potential sources of contamination, violations, water quality monitoring points and results, accidental releases to air or wetland locations to name a few.

DEN will allow the public to view all facility information, violations, enforcement actions and monitoring results pertaining to Air Quality, Waste Water, Water Supply, Hazardous Waste, Hazardous Waste Annual Reports, Solid Waste, Contaminated Site Cleanup, Underground Tanks and Vapor Recovery, Above Ground Tanks, Septic Permits, Wetlands, Ambient Water Monitoring Data and Corrective Action Sites.

DEN also contains limited information on Nature Preserve, Open Space, Parks, Playgrounds, and Wildlife Areas.

Purpose of DEN

The purpose of DEN is to allow both Departmental staff and public easy access to answer questions such as:

  • Has DNREC had any current or past dealings with a piece of property?
  • What environmental permits are held by an industrial facility?
  • Are there any environmental concerns with a piece of property being considered for acquisition for a park expansion?
  • Where are the potential sources of contamination in my watershed?
  • Are there any wetlands mapped on a property being considered for development?
  • Have there been any violations of any permits at a facility?
  • Where are ambient surface water monitoring points on a stream and what are the results of that monitoring?

DEN Tools

Search Facilities - A query and reporting tool for viewing detailed facility information. Searches can be performed on facilities, DNREC Interests, Permits, Persons, Organizations, and Addressees

Search Inspections

Search Violations

Search Enforcement Actions - A query tool to search for enforcement actions taken by DNREC. Various criteria can be entered to return the best search results.

Search Permits

Search Releases

Search Map - An interactive Geographic Information System (GIS) tool to locate facilities within Delaware and show any associated information about the facility

Quick Start To Using DEN

NOTE: To get the best viewing results, your screen setting should be set to 1024x768. Otherwise, the viewable area may be limited.
  1. Move the mouse pointer to the tool you wish to use.
  2. A pop-up window with additional options will be displayed.
  3. Move the mouse pointer to the option in the pop-up window.
  4. The option that is selected will be highlighted.
  5. Left click on that selection.
  6. A new window will open and the tool selected will start.

To Navigate back to the DEN Home page, left click on the DEN logo located in the upper left-hand corner of every page within the navigator.

Glossary - Provides the ability to search for terms and definitions used in the navigator. Some terms provide additional links to related terms and definitions.

If you have any questions or comments about DEN please contact the DEN development team by Email at:

Disclaimer: This database includes information on potential, possible, and known contaminant source sites and on ambient environmental monitoring sites in the state of Delaware. The information contained in this database is summarized from DNREC's files and is provided as a service by the Department. Additional information is available on most sites from the contact program listed with each site. DNREC makes no representation as to the completeness or accuracy of the information in this database.