This Shale Network subset contains groundwater observations from Beaver, Washington, and Greene counties in southwestern Pennsylvania. It accompanies Shaheen and colleagues’ 2022 study of groundwater chemistry where shale gas development overlaps with earlier oil, gas, and coal extraction.
Download the dataset from Penn State Data Commons.
The 2022 date identifies this study compilation. It does not imply that all samples were collected in 2022 or that the dataset covers every groundwater source in southwestern Pennsylvania. Consult the repository metadata and article for sampling dates, analytical methods, and the limits of the study.

For methods and interpretation, see the associated Shaheen et al. (2022) study.