Chester County Observation Well Network

Chester County has one of the most robust county-wide water-level observation-well networks in Pennsylvania. Since 1973, water levels have been measured monthly by staff of the U.S. Geological Survey in a network of 20 wells. An additional 7 wells have been added in recent years to provide a more spatially complete network.

The data are used for drought monitoring and management, as well as monitoring the water table in different aquifers and different parts of Chester County.


Most Recent Published Information


  • December 2018 Report
  • December 2018 Well Status Map
  • Map of Observation Well Stations
  • Link to U.S. Geological Survey web site for the Network (external link)

  • Archived Reports and Maps


    2018 Reports



    2017 Reports



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    2018 Maps



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