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.

The located wells dataset, containing over 65,000 wells, 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 over 64,000 wells, is now available for download. This table contains all the well data reported to MGS that doesn't have a spatial location.

Maine Well Database Locations

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 - Well Depth, Well Yield, Overburden Thickness - click the Layers menu below.

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