Google markerEach 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
Signature Chemical
Code Description Events
10094 Water Well Before Treatment 1
10307 1