Pennsylvania Water Science Center
Susquehanna River Story - Water Quality
USGS Releases Products Documenting Effects of Hurricane Ida
Updating Pennsylvania Streamgage Datums
USGS is updating streamgage datums to reflect elevations in North American Vertical Datum of 1988 (NAVD88).
USGS is updating streamgage datums to reflect elevations in North American Vertical Datum of 1988 (NAVD88).
Nitrogen in the Chesapeake Bay Watershed - A Century of Change
Nitrogen in the Chesapeake Bay Watershed - A Century of Change
USGS Collects High-Quality Water-Resources Data for Pennsylvania
Streamflow, groundwater levels, water quality, precipitation, water use, and other related data, both real time and historic
Streamflow, groundwater levels, water quality, precipitation, water use, and other related data, both real time and historic
Hydrologic Studies, Research, and Tools for Pennsylvania
Water availability, groundwater contamination, nutrient loading in streams, effects of land use on water quality, and other water-resource topics
Water availability, groundwater contamination, nutrient loading in streams, effects of land use on water quality, and other water-resource topics
Pennsylvania Water Science Center
We work in cooperation with numerous federal, state, and local agencies to collect scientific data and conduct scientific studies of the source, quantity, quality, ecology, and use of Pennsylvania's water resources.
News
USGS Releases Geonarratives Documenting Monitoring Activities in Chester County, Pennsylvania
USGS Releases Geonarratives Documenting Monitoring Activities in Chester County, Pennsylvania
USGS Releases Geonarrative Documenting Results of Pesticide Sampling in Pennsylvania Groundwater
USGS Releases Geonarrative Documenting Results of Pesticide Sampling in Pennsylvania Groundwater
USGS article featured on the cover of the July/August issue of Journal of Environmental Quality
USGS article featured on the cover of the July/August issue of Journal of Environmental Quality
Publications
Using a time-of-travel sampling approach to quantify per- and polyfluoroalkyl substances (PFAS) stream loading and source inputs in a mixed-source, urban catchment
Understanding per- and polyfluoroalkyl substances (PFAS) mass distribution in surface and groundwater systems can support source prioritization, load reduction, and water management. Thirteen sites within an urban catchment were sampled utilizing a time-of-travel sampling approach to minimize the influence of subdaily fluctuations in mass from PFAS point sources and to quantify PFAS and ancillary
Population genetic structure and demographic history reconstruction of introduced flathead catfish (Pylodictis olivaris) in two US Mid-Atlantic rivers
Population genetic analysis of invasive populations can provide valuable insights into the source of introductions, pathways for expansion, and their demographic histories. Flathead catfish (Pylodictis olivaris) are a prolific invasive species with high fecundity, long-distance dispersal, and piscivorous feeding habits that can lead to declines in native fish populations. In this study, we analyse
A spatial machine learning model developed from noisy data requires multiscale performance evaluation: Predicting depth to bedrock in the Delaware River Basin, USA
Spatial machine learning models can be developed from observations with substantial unexplainable variability, sometimes called ‘noise’. Traditional point-scale metrics (e.g., R2) alone can be misleading when evaluating these models. We present a multi-scale performance evaluation (MPE) using two additional scales (distributional and geostatistical). We apply the MPE framework to predictions of de
Science
Hydrologic and Water Quality Studies of PFAS in Pennsylvania
USGS is working with federal, state, and local partners to monitor and evaluate perfluoroalkyl and polyfluoroalkyl substances (PFAS) in Pennsylvania's groundwater and surface waters. A recent study sampled tap water in Pennsylvania (and other states) and detected PFAS chemicals in some samples.
Chester County, Pennsylvania
USGS has had a cooperative program with Chester County, Pennsylvania, to measure and describe water resources since 1969. Cooperation has been primarily with the Chester County Water Resources Authority, with participation from the Chester County Health Department. This partnership provides Chester County with scientific information for water-resources management.
Pesticides in Pennsylvania Groundwaters
USGS annually samples domestic groundwater wells to characterize pesticides, nutrients, and radon in agricultural areas, in cooperation with the Pennsylvania Department of Agriculture. Beginning in 2021, samples for major ions, trace elements, bacteria, and isotopes will also be collected. A subset of wells will be sampled for per- and polyfluoroalkyl substances (PFAS), emerging industrial...