GIS Maps and Other Data Files

To use the data in Google Earth format, it is recommended that you have Google Earth Pro installed.  For help using Google Earth go to their Help Center.

ArcGIS Online works best with Google Chrome , Mozilla Firefox ,and Safari Browsers. ArcGIS applications are available for iOS and Android devices. .

 Download Key: Google Earth: The Google Earth Globe logo   ArcGIS Online Experience Builder or Instant App: The ESRI Experience Builder logo   Text File: The text file logo   Shapefile or Layer Package: The ESRI shapefile logo   PDF File: The Adobe PDF logo   Web Page: A light blue globe logo representing a link to web page  

 GIS Open Data: Access to Shapefile, CSV text file, and KML downloads (including rest service links): A GIS logo representing a link to GIS Open Data web site Related GIS Table download: An image representing a table which links to GIS Open Data web site

DEP Interactive Maps and Data

The Bureau of Remediation and Waste Management

  • Technical Services Spill Projects (Data Refreshed Daily)   The ESRI Experience Builder logo linking to the Technical Services Spill Projects Web Map
  • Hazardous Oil Spill System (HOSS) Sites (Data Refreshed Every Saturday Night)   The ESRI Experience Builder logo linking to the Hazardous Oil Spill System (HOSS) Sites Web Map   DISCLAIMER: The HOSS sites dataset does not contain the locations of all spills recorded by the Maine DEP.
      The master list containing all spills recorded by the state (including all unlocated spills) can be found here.
  • Oil Spill Geographic Response Strategies - Marine (11/17/2020)  
  • Registered Petroleum Tanks Database (Map Data Refreshed Daily)   The ESRI Experience Builder logo linking to the Registered Petroleum Tanks Web Map   (Text File Updated Monthly):
    • Registered Tank Spatial Data (Data Updated Nightly)  
    • Registered Tanks Chamber Data (Data Updated Nightly) 
    • NOTE: The Registered Petroleum Tanks Google Earth version is now available for download from the ESRI Open Data Hub. The Hub site can be accessed via the links above for the tank spatial and chamber data.
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  • Remediation Sites (Institutional Controls) Database (Data Refreshed Every Saturday Night)   The ESRI Experience Builder logo linking to the Remediation Sites Web Map  
  • NOTE: The RemediationSites Google Earth version is now available for download from the ESRI Open Data Hub. The Hub site can be accessed via the Remediation Sites GIS link above for GIS data.
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  • Solid Waste - Closed Municipal Landfills (5/27/2025)   The ESRI Experience Builder logo linking to the Closed Municipal Landfill Web Map  
  • Solid Waste Recycling Locations (Data Refreshed As Needed)  
  • Download a spreadsheet of recycling locations in Maine as of 10/24/2025.

  • Bureau of Remediation and Waste Management program contacts: Contacts.

The Bureaus of Land Resources and Water Quality

  • Aquatic Invasive Plant Locations (Updated Annually)    
  • Aquifer Quantitative Use Assessment (AQUA) Index (11/17/2009)  
  • Bacteria Monitoring Survey (Including Stream TMDL, Volunteer River Monitoring and links to the Maine Healthy Beaches data)(Under Construction-Back Soon!)  
  • Biomonitoring Stream and Wetland Sampling Data (2/5/2026)   The ESRI Experience Builder logo linking to the Biomonitoring Stream and Wetland Sampling Web Map  
  • Head of Tide Locations (7/16/2019)   The ESRI Experience Builder logo linking to the Head of Tide Web Map  
  • Integrated Report Segments - 2024 (Draft) and 2018/2020/2022 (Final):   The ESRI Experience Builder logo linking to the Intergrated Report Segments Instant App Web Map
    • 2024 Draft IR KMZ (This KMZ might take a minute or more to initially download due to its large size.):  
    • 2024 Draft Integrated Report ArcGIS Map Package (NOTE: Must have a licensed copy of ArcGIS Pro software installed to use this link.)  
    • 2018/2020/2022 IR ArcGIS Map Package (NOTE: Must have a licensed copy of ArcGIS Pro software installed to use this link.)  
  • Low Tide Orthoimagery  
    • Casco Bay 2013  
    • Casco Bay 2018  
    • South Coast 2021 (Elliot to Cape Elizabeth)  
    • Casco Bay 2022  
    • Mid-Coast 2023  
    • Penobscot Bay 2024  
    • Acadia 2025  
  • Maine Dams, Levees, Impoundments & Barriers   The ESRI Experience Builder logo linking to the Maine Dams, Levees, Impoundments and Barriers Web Map
  • Maine Healthy Beaches Program -   Beach Status  
  • Maine Lake Information (Moving to ESRI Web Services - Returning Soon)  
  • Maine Boat Pumpout Stations and No Discharge Areas (8/30/2021)   The ESRI Experience Builder logo linking to the Maine Boat Pumpout Stations and No Discharge Areas Web Map 
  • Mining Sites (2/09/2024)   The ESRI Experience Builder logo linking to the DEP regulated Mining Sites Web Map      
  • Municipal Separate Stormwater Sewer Systems Regulated Areas (5/27/2014)    
  • NLCD Impervious Surface Change Tool for Stormwater Management   Renewable Energy Compensation Large Undeveloped Habitat Blocks NLCD Impervious Surface Change Tool for Stormwater Management Web Map
  • Non Point Source - Historical and Current Projects  

  • NRPA Habitat Data (NRPA datasets are produced and maintained by Maine IF&W)  Please contact Maine IF&W with any questions regarding NRPA Habitat layers and map viewers. Maine IF&W BwH Contacts  

  • Overboard Discharges (12/16/2024)    
  • Permit by Rule/Land Licensing Map -   Maine DEP MELS Map Explorer
  • Permit by Rule/Land Licensing Table -   Applications and Permits Table
  • Renewable Energy Compensation Large Undeveloped Habitat Blocks   The ESRI Experience Builder logo linking to the Renewable Energy Compensation Large Undeveloped Habitat Blocks
  • Seagrass Data Viewer  
  • Seagrass (Polygons Only)  
    • Casco Bay 2013  
    • Casco Bay 2018  
    • South Coast 2021 - Elliot to Cape Elizabeth  
    • Casco Bay 2022  
    • Mid-Coast 2023  
    • Penobscot Bay 2024  
    • Acadia 2025  
    • Seagrass Change Anaylsis  
  • Site Location of Development and Stormwater Law Permits: 2006 to present (12/21/2022)    
  • Stormwater Discharges from Regulated Industrial Activities   The ESRI Experience Builder logo linking to the Stormwater Discharges from Regulated Industrial Activities Web Map  
  • Urban Impaired Streams Watersheds (9/26/2023)    
  • Wastewater Licensed Dischargers and Critical Salmon Habitat (12/9/2011)
    • Androscoggin Rivershed  
    • Kennebec Rivershed  
    • Penobscot Rivershed  
  • Wastewater Facilities and Outfalls (MEPDES) (12/19/2025)   The ESRI Experience Builder logo linking to the Wastewater Facilities and Outfalls, Including CSO's   Facilities:   Outfalls:
    Note: Maine DEP plans to update this data twice per year. Updates should occur during January and July. Please refer to this page for the exact date.  
  • Combined Sewer Overflows - CSO's (1/02/2024)   CSO:
    Note: This data is updated infrequently. Please refer to this page for the exact date.
     
  • Waterbody Statutory Classification   The ESRI Experience Builder logo linking to the Waterbody Statutory Clasification Web Map  
  • Waterbody Statutory Classification History 1965 - 2019 (Map Only): The ESRI Experience Builder logo linking to the Waterbody Statutory Classification History for the years 1965 to 2019  

    Bureau of Land Resources program contacts: Contacts.

    Bureau of Water Quality program contacts: Contacts.

The Bureau of Air Quality

All Bureaus

  • Environmental and Geographic Analysis Database (EGAD)
    • Site Types (Threats to Groundwater and Environmental Monitoring) (Data Refreshed Daily)   The ESRI Experience Builder logo linking to the EGAD Site Types Web Map  
    • NOTE: The EGAD Site Types Google Earth version is no longer available or supported. Please use the ArcGIS Online version above.  
    • Sample Locations   The ESRI Experience Builder logo linking to the EGAD sample location Web Map  
    • To request data, please fill out our Request EGAD Data Form.
    • Regulated Sites Flood Risk   The ESRI Experience Builder logo linking to the Regulated Sites Flood Risk Web Map

 

Downloading Data:  When downloadable data is available for GIS Users there are three options:
    Option 1:  Use the raw data file alternate links above to download a shapefile or text file.
    Option 2:  Click on the project or layer links in the Google Earth table of contents (Places window).  In the balloon, there will be a link to a text file with attribute data and spatial coordinates that can be imported into most GIS systems.
    Option 3:  Use the GIS download link to take you the ArcGIS Hub or Maine GeoLibrary open data site(s) and look for the download option to the right of the title.

Feedback:  If you would like to comment on the use of Google Earth, ArcGIS Online, provide suggestions for improving the functionality, or report problems please go to our Feedback Form.

Disclaimers: 
-  The Maine DEP is only providing the data to be used in the Google Earth application on the user's computer.  We are not responsible for installing or maintaining this software product.
-  The Google Earth imagery dates provided do not necessarily represent the date the image was captured but show the date the imagery was processed and deployed.
-  ArcGIS Online Web maps open within a separate tab on your web browser.  Maine DEP GIS Unit recommends using the Chrome Web browser to view ArcGIS Online Web Maps.
-  For questions regarding data content or data accuracy please contact the staff in the responsible programs using the contact links in each bureau section above. 
-  This data is for visual representation only and may not contain all data that is available by contacting the DEP directly.
-  The individual DEP Google Earth Map projects and ArcGIS Online Web Maps contain a number of statewide data layers.  These layers can be obtained from the Maine GeoLibrary Data Catalog.
-  If you need to make detailed decisions using geospatial data please obtain original copies of the data.


GIS Data Distribution

MEDEP staff generate and utilize a large amount of GIS data.  Non-MEDEP GIS data are typically distributed by the Maine GeoLibrary.

If you can't find the data you are interested in contact the Maine DEP GIS Unit.