Groundwater
"Almost all shallow groundwater in Pennsylvania reaches a stream within days, weeks, or months after the water enters the groundwater system."—Page 17, in The Geology of Pennsylvania's Groundwater, ES3.
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Learn more about groundwater: The Geology of Pennsylvania's Groundwater (Pennsylvania Geological Survey Educational Series 3), and more. |
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Since the 1930s, the Survey has developed regional and statewide datasets and reports on groundwater. These water resource reports cover much of the state and are now available online. |
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Over a million private water supply wells are used in Pennsylvania. More information is provided here for wellowners, drillers, and those interested in water wells. |
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Recently released groundwater reports and data products from the Pennsylvania Geological Survey are listed here. |
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Links are provided here to information on a wide variety of water topics that are related to groundwater, and to organizations that are involved with groundwater. |








