Maine
Environmental and Geographic Analysis Database (EGAD)
The Environmental and Geographic Analysis Database (EGAD) of the Maine Department of Environmental Protection (DEP), formerly the Environmental and Groundwater Analysis Database, was designed to store site and water quality information for potential and actual sources of groundwater contamination in Maine. DEP says it now also holds biological and surface water sampling sites, and soil, sediment, air and water quality data. Staff of DEP's Bureau of Remediation and Waste Management and Bureau of Water Quality use it; DEP says the detailed well and analytical data are used to design remedial action at hazardous spill sites and to evaluate the potential for cumulative impacts of real estate development on groundwater quality.
In a Phase I ESA
ASTM E1527-21 does not name sampling databases among its standard record sources. EGAD matters because DEP says it contains data from sites with land use activities that are potential or actual sources of contamination. Three Maine details help.
- Consultants' data goes in. DEP requires laboratory and field data submitted to EGAD to use its Electronic Data Deliverable (EDD) template, version 6.0 only since November 1, 2015, and requires laboratory submittals to include the associated quality control results. Submittals for the Bureau of Remediation and Waste Management go to dep.edd@maine.gov. Where a property was sampled for a DEP program, ask whether the data were submitted to EGAD.
- Check the original reports. DEP says it makes no guarantee as to the accuracy, reliability, timeliness or completeness of EGAD data, and that the original laboratory reports and field sheets should be consulted to ensure the data's authenticity. Treat an EGAD value as a pointer to the report, not as the report.
- Site types are defined. DEP defines every current EGAD site type in its EGAD Lookup Tables. Read a site type against that definition.
Where to look a site up
- DEP's GIS Maps and Other Data Files page maps EGAD Site Types (threats to groundwater and environmental monitoring) and EGAD Sample Locations, both refreshed every Saturday night. This handbook did not open the maps.
- To request data, DEP points to its Request EGAD Data Form.
Getting the file
DEP asks that laboratory reports be sent with the EDDs that carry laboratory data, but the pages read do not say whether EGAD's data requests return them. For the reports behind a value, use DEP's file room and document portals; see File Room, Reports and Lists.
Sources
Maine Department of Environmental Protection pages, read October 13, 2026, no modified date shown: