Water Well Database

The Water Well Information Law, passed in 1987, requires the Maine Geological Survey to collect information on new water wells in Maine. This information is essential to any effort aimed at understanding Maine's ground water resources. In addition, the information is useful to communities considering new water supplies or in their planning efforts, to developers and businesses, to consultants investigating water supply or quality issues, to drillers, and to agricultural irrigators.



Map-based Well Search

The map shows all wells in the database that are geographically located. Wells were located by GPS, by street address locations (geocoding), and by using tax maps in combination with air photos, so location accuracy varies. Because of the large amount of well data, the well points won't draw on the map until zooming into the regional level. For descriptions of individual wells, click the dots on the map below. To show the different layers symbolized by Well Depth, Well Yield, or Overburden Thickness, click the Layers menu below.


View Map Full Screen


Table-based Well Search

The Table-based Search allows searching all well records from the Maine Water Well Database whether or not they have been located on the map. Search the table using values in the search fields below. All fields in the table are sortable by clicking on the header. Additional field filters can be applied to the search results using the field search boxes below the table.


Search Results:

Well Town Well Address Well Driller Drilled For - Last Name Current Owner - Last Name Current Owner - Company Drill Date Located? View on Map Well No. Well Card No. Tax Map No. Tax Lot No. Well Depth (ft) Well Yield (gpm) Depth to Bedrock (ft) Casing Length (ft) Well Use Well Type Well Development Well Construction Hydrofracture Geothermal Submit Well Data Correction
Well Town Well Address Well Driller Drilled For - Last Name Drilled For - Company Current Owner - Last Name Drill Date Located? View on Map Well No. Well Card No. Tax Map No. Tax Lot No. Well Depth (ft) Well Yield (gpm) Depth to Bedrock (ft) Casing Length (ft) Well Use Well Type Well Development Well Construction Hydrofracture Geothermal Submit Well Data Correction


Digital Data

The located wells dataset, containing , is available for download in spatial or tabular formats. The dataset contains information on all wells in the database which could be geographically located. Data points have been located by GPS, by street address locations (geocoding), and by using tax maps in combination with air photos, so location accuracy varies. The database includes coordinates and descriptive information such as well yield, depth, overburden thickness, well use, and well type. This information, up to the date of publication, is also portrayed on the Bedrock Ground-Water Resources Basic Data Maps in PDF format and in the web map below.

The unlocated wells dataset, containing , is now available for download. This table contains all the well data reported to MGS that doesn't have a spatial location.


Submit Well Correction Data

Both the Map-based and Table-based Well Search tools now allow users to submit corrections to the wells in the database. In the map, simply click on a well point, scroll down to the bottom of the pop-up box and click the "Submit Well Data Correction: More info" link. In the table, scroll all the way over to the right and click the "Submit Well Data Correction" tool. In the Well Correction form, change any or all of the data that you think is incorrect, fill out your contact information at the bottom, and then click the Save New button. This will submit your changes for review to MGS staff.


Septic System Information

Many homeowners needing information on their wells also need to locate their septic systems. There are also rules about the relative location of water wells and septic systems. The resources below should help answer these questions.