To activate drag with keyboard, press Alt + Enter. Once in keyboard drag state, use the arrow keys to move the marker. To complete the drag, press the Enter key. To cancel, press Escape.
Each marker shows the centroid (middle) of a 1-mile grid square. Centroids protect homeowners' privacy because they denote 1-mile grid squares within which groundwater wells were sampled. Centroids do not correspond to specific sampling locations.
Levels of Gas Well "Signature Chemicals" in Groundwater