In Pennsylvania, the USGS's water-resources roots date back to the late 1800's, with the initiation of streamflow gaging on the Susquehanna and Delaware Rivers and assessments of groundwater resources near Philadelphia. The USGS Pennsylvania Water Science Center continues to provide scientific information about the water resources of the Susquehanna River Basin, in cooperation with regional and local agencies and stakeholders, and with other USGS Water Science Centers and national programs.
In early 2022, staff from the Pennsylvania Water Science Center removed a set of concrete stairs leading down an embankment to the streamgaging station Susquehanna River at Harrisburg (01570500) located on Harrisburg’s City Island. City Island offers many popular recreational activities resulting in high pedestrian traffic. The stairs removal improved public safety and the aesthetics of the surrounding area. Aging streamgages are routinely upgraded to improve safety and enhance data collection quality. USGS has been collecting streamflow data at this location since 1890, which makes it one of the oldest stations in the Pennsylvania streamgaging network.


Also see Pennsylvania and the Chesapeake Bay Watershed for science related to the effects of the Susquehanna River and other Pennsylvania streams on water quality in the Chesapeake Bay.
USGS national programs in the Susquehanna River Basin in Pennsylvania have included the National Water Quality Program and Chesapeake Bay Activities.
Pennsylvania and the Chesapeake Bay Watershed
New study highlights linkages among land use, water chemistry, and the health of Smallmouth Bass in the Susquehanna River watershed
Phosphorus in the Susquehanna River may be tied to legacy sediment and changing pH
Floodplains provide millions of dollars in benefits every year to people in the Chesapeake Bay and Delaware River watersheds
Flux of Nitrogen, Phosphorous, and Suspended Sediment from the Susquehanna River Basin to the Chesapeake Bay During Tropical Storm Lee, September 2011, as in Indicator of the Effects of Reservoir Sedimentation on Water Quality
Chesapeake Bay Nontidal Network 1985 - 2018: Daily High-Flow and Low-Flow Concentration and Load Estimates
Population genetic data for flathead catfish from the Susquehanna and Delaware River basins in Pennsylvania and Maryland, USA
Susquehanna River Basin freshwater mussel surveys: 2008-2015
Annual winter-spring nitrogen loads for the Susquehanna and Potomac Rivers, 1985 to 2018
Hydrograph-separation results for 225 streams in the Chesapeake Bay watershed derived by using PART, HYSEP (Fixed, Local minimum, Slide), BFI, and a Recursive Digital Filter with streamflow data ranging from 1913 through 2016
Factors influencing the prevalence of hyperpigmented melanistic lesions in smallmouth bass Micropterus dolomieu in the Susquehanna River Basin, Pennsylvania
Temporal analysis of water chemistry and smallmouth bass (Micropterus dolomieu) health at two sites with divergent land use in the Susquehanna River watershed, Pennsylvania, USA
Feeding habits and ecological implications of the invasive Flathead Catfish in the Susquehanna River basin, Pennsylvania
Streambank and floodplain geomorphic change and contribution to watershed material budgets
Nitrogen in the Chesapeake Bay watershed—A century of change, 1950–2050
An assessment of the thiamine status of Smallmouth Bass (Micropterus dolomieu) in the Susquehanna River watershed
Spatial and temporal patterns of low streamflow and precipitation changes in the Chesapeake Bay Watershed
Estimating streamflow and base flow within the nontidal Chesapeake Bay riverine system
The mighty Susquehanna—extreme floods in Eastern North America during the past two millennia
Surface-water quality in the Lycoming Creek watershed, north-central Pennsylvania, August 1–3, 2011
A detailed risk assessment of shale gas development on headwater streams in the Pennsylvania portion of the Upper Susquehanna River Basin, U.S.A.
Optimal hydrograph separation using a recursive digital filter constrained by chemical mass balance, with application to selected Chesapeake Bay watersheds
In Pennsylvania, the USGS's water-resources roots date back to the late 1800's, with the initiation of streamflow gaging on the Susquehanna and Delaware Rivers and assessments of groundwater resources near Philadelphia. The USGS Pennsylvania Water Science Center continues to provide scientific information about the water resources of the Susquehanna River Basin, in cooperation with regional and local agencies and stakeholders, and with other USGS Water Science Centers and national programs.
In early 2022, staff from the Pennsylvania Water Science Center removed a set of concrete stairs leading down an embankment to the streamgaging station Susquehanna River at Harrisburg (01570500) located on Harrisburg’s City Island. City Island offers many popular recreational activities resulting in high pedestrian traffic. The stairs removal improved public safety and the aesthetics of the surrounding area. Aging streamgages are routinely upgraded to improve safety and enhance data collection quality. USGS has been collecting streamflow data at this location since 1890, which makes it one of the oldest stations in the Pennsylvania streamgaging network.


Also see Pennsylvania and the Chesapeake Bay Watershed for science related to the effects of the Susquehanna River and other Pennsylvania streams on water quality in the Chesapeake Bay.
USGS national programs in the Susquehanna River Basin in Pennsylvania have included the National Water Quality Program and Chesapeake Bay Activities.