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Pennsylvania Groundwater Watch

September 28, 2022

Pennsylvania Groundwater Watch provides access to groundwater level data from 108 sites in the USGS Active Groundwater Level Network for Adams, Chester, Montgomery, Philadelphia, and Pike Counties. Water levels at each site are measured monthly to monitor for local pumping effects and changes to drought conditions.

To begin viewing the data, click on a tab under the USGS Banner with a county name, or click inside the county. Then click on a well on the county map to generate plots and tables relating the most recently collected groundwater levels to historical data from that site. Percentiles are only calculated for wells with six or more years of data.

All data presented in this mapper is sourced from the National Water Information System, which contains water resources data collected from approximately 1.9 million sites in all 50 States, the District of Columbia, Puerto Rico, the Virgin Islands, Guam, American Samoa and the Commonwealth of the Northern Mariana Islands.



This software has been approved for release by the USGS. Although the software has been subjected to review, the USGS reserves the right to update the software as needed pursuant to further analysis and review. No warranty, expressed or implied, is made by the USGS or the U.S. Government as to the functionality of the software and related material nor shall the fact of release constitute any such warranty. Furthermore, the software is released on condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from its authorized or unauthorized use.

Unless otherwise stated, all data, metadata and related materials are considered to satisfy the quality standards relative to the purpose for which the data were collected. Some data presented may be preliminary and is subject to revision; it is being provided for timely best science. The information is provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized and unauthorized use of the information.