Data

Beginning in January 2025, the U.S. Geological Survey (USGS) and the North Jersey District Water Supply Commission (NJDWSC) initiated a study to characterize the presence of per- and polyfluoroalkyl substances (PFAS) in four northern New Jersey watersheds. This study was designed to assess the occurrence and distribution of PFAS in the Passaic River Basin including 37 mainstem and...

Streamgaging weirs, like the ones used by the U.S. Geological Survey (USGS), play a critical role in providing accurate and stable streamflow data, but their presence can affect the passage of diadromous fish species such as river herring and American shad. In some situations, weirs existing in rivers and streams are no longer used because they were part of a farm irrigation system or...

This data release contains recorded longitudinal survey and water-quality data taken on the Maurice and Cohansey Rivers from October 2021 through April 2024. Data were collected with a multi-parameter sonde and includes specific conductance, water temperature, latitude, longitude, and date and time of sample collection. Additional data were collected with the sonde data including...

This data release provides the concentration and quality-assurance results for inorganic constituents analyzed in water-quality samples from 26 residential and commercial tapwater locations in Montana by the U.S. Geological Survey (USGS) Environmental Health Program (EHP), Tapwater Exposure Study. The samples were collected between June 10-12, 2024, from both public supply (8) and...

This data release reports the concentration results for organic compounds (disinfection byproducts [DBP], pesticides, per- and polyfluoroalkyl substances [PFAS], pharmaceuticals and volatile organic compounds [VOC]), cyanotoxins, microbiological indicators, as well as radon-222 analyzed in samples collected from private well and public supply sourced tapwater samples from a community in...

This data release contains the concentration results of per- and polyfluoroalkyl substances (PFAS) collected in fish tissue and whole blood, bed sediment and biofilm samples from water bodies in and surrounding the Little Bighorn River (LBHR) in Montana in July 2023. A total of 29 filets and whole blood samples were collected from 10 brown trout, 10 catfish, 6 rock bass, and 3 goldeye...

This data release contains the concentration and quality assurance results for 30 streams, sampled twice. In 2023, the typology sampled was Pennsylvania and Maryland Piedmont mixed agriculture. Each dataset consisted of 30 sampling sites. Samples were analyzed for the following constituent classes (count of constituents); field and water-quality parameters (9), nutrients/anions (13)...

This data release contains shapefiles of hydrogeologic regions of the conterminous United States. The United States Geological Survey (USGS) is developing a National Extent Hydrogeologic Framework. In support of that effort, principal aquifers (PA) (USGS, 2003) and secondary hydrogeologic regions (SHR) (Belitz and others, 2018a) in the conterminous United States were combined into a...

Estimates of various low-flow statistics were computed at 45 ungaged stream locations throughout New Jersey during the 2024 water year using methods in the published reports, 1) Streamflow characteristics and trends in New Jersey, water years 1897-2003 (Watson and others, 2005) and 2) Implementation of MOVE.1, censored MOVE.1, and piecewise MOVE.1 low-flow regressions with applications...

The U.S. Geological Survey completed a study of selected continuous and partial-record streams in New Jersey for a historical period (1950-79) and a current period (1990-2019) in order to better understand potential streamflow trends over time. The outcomes of this project will support New Jersey Department of Environmental Protection and other agencies in water-supply planning, waste...

This dataset contains the well-location information and water-level measurements for 930 wells from 10 confined aquifers of the New Jersey Coastal Plain. Well-location and water-level data is publicly available from the U.S. Geological Survey (USGS) Water Data for the Nation database (USGS, 2025). Water-level measurements from 3 wells in Pennsylvania and reported water-level measurements...

Within New Jersey’s Raritan Basin Water Supply Complex, multiple lakes and reservoirs with persistent and recurrent cyanobacterial harmful algal blooms (cyanoHABs) discharge water which ultimately travels downstream in surface water to drinking-water intakes. Cyanobacteria and other water-quality data were collected as part of a collaborative study among multiple agencies, including the...