Start with a published dataset when you need a citable version for analysis. Each repository record provides its own description, files, and citation information. Check the sampling dates and coverage in the files; a release date is not a sampling date.
Published datasets
| Dataset | Version or scope | Repository record |
|---|---|---|
| Database snapshot | Copy of the Shale Network database as of June 17, 2022 | Penn State Data Commons |
| Pennsylvania groundwater | September 2024 compilation used in the regional salinization study | Penn State Data Commons |
| Southwestern Pennsylvania groundwater | Beaver, Washington, and Greene counties; 2022 study dataset | Penn State Data Commons |
| Bradford County groundwater | May 2018 compilation | Penn State Data Commons |
| Lycoming County groundwater | October 2018 compilation used in the Sugar Run study | Penn State Data Commons |
| Northeastern U.S. stream chemistry | Dataset accompanying the 2020 stream methane study | Article and supplementary data |
The June 2022 snapshot is a dated archive, not a representation of the database totals reported in October 2026. For a more recent extract or help selecting a dataset, contact Tao Wen.
Dataset highlights explain the associated studies and their scope.
Search across sites and measurements
CUAHSI HydroClient is another route for discovering hydrologic observations. Use the Shale Network database record to identify the collection. If a search or download is unavailable, use a published dataset above or contact the project team.
Measurements represented
Available analytes differ among sites and datasets. Examples include:
- General water chemistry: pH, specific conductance, alkalinity, acidity, hardness, total dissolved solids, and suspended solids.
- Major ions and nutrients: sodium, potassium, calcium, magnesium, chloride, bromide, sulfate, ammonium, nitrate, and nitrite.
- Trace constituents: arsenic, barium, iron, manganese, lead, strontium, and other elements.
- Gases, organic compounds, and radioactivity: methane, selected organic compounds, gross alpha and beta measurements, and radium isotopes.
Consult the downloaded metadata for the exact variable name, units, analytical method, and reporting qualifiers. Read the data-use guidance before reuse.