Pennsylvania Groundwater Quality Monitoring Network

Science Center Objects

USGS Pennsylvania Water Science Center, in cooperation with the Pennsylvania Department of Environmental Protection, samples 28 wells biannually to monitor ambient groundwater quality conditions in a variety of settings throughout Pennsylvania.

In 2015, the USGS Pennsylvania Water Science Center established a long-term, fixed-station ambient groundwater quality monitoring network at 17 observation wells distributed throughout Pennsylvania. Since then, the network has expanded to 28 wells. Each well is sampled in the spring and fall of every year for major elements, trace metals, nutrients, and organic compounds. Additional first-time sampling is completed for light hydrocarbons, radiological elements, and volatile organic compounds. The goals of this project include characterizing ambient groundwater quality conditions, monitoring for short- and long-term changes in groundwater quality, and generating statistical reports and analyses of sample results.

Thumbnail image of map showing groundwater quality in Pennsylvania

Click on the image to open the Map App.

The most recent results for selected constituents can be accessed through the Groundwater Quality Monitoring Network Map App.

Download all available groundwater quality monitoring network data from the National Water Quality Monitoring Council here (Select data to download at the bottom of the NWQMC webpage. Please note data will be downloaded as a .csv file, and the process may take several minutes.) These data are preliminary or provisional and are subject to revision. They are being provided to meet the need for timely best science. The data have not received final approval by the USGS and are provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the data.