This dataset contains quality-assurance and quality-control data (QA/QC) not publicly available in the online National Water Information System (NWIS) for the Pennsylvania Groundwater Monitoring Network collected by the U.S. Geological Survey (USGS) in Pennsylvania, 2015-2019. The quality-control data (such as blanks and replicates) were collected at a subset of sites to ensure that the data meets specific data-quality objectives of this program. Also included in this data release are the supplemental tables for the accompanying USGS publication “Characterization of Ambient Groundwater Quality within a State-wide, Fixed Station Monitoring Network in Pennsylvania, 2015-2019.” The supplemental tables consist of: 1) a correlation matrix using results from principal components analysis (PCA) and 2) individual contributions of each sample to the PCA results are also included.

Groundwater quality data for 472 domestic well-water samples were retrieved from the USGS National Water Information System (NWIS) database and combined with descriptive information on the sampled well locations. The NWIS data for a sample, collected on the selected date, were averaged into a single record (one per well), and rounded according to USGS protocols. For evaluation and reporting, the water-quality data were further combined with physical attributes and classified by lithology, topographic position, physiographic province, region, redox, and pH (as standalone matrix, one row per well). A second data matrix file incorporating minimum reporting levels for censored and low-reported values (set to 0.99X highest common reporting level) was generated for statistical analysis. The two water-quality matrix files, in comma delimited format (.csv) plus a third file that has complete descriptive information for all the water-quality and physical parameters constitute the primary products of the data release.

Groundwater quality data for 472 domestic well-water samples were retrieved from the USGS National Water Information System (NWIS) database and combined with descriptive information on the sampled well locations. The NWIS data for a sample, collected on the selected date, were averaged into a single record (one per well), and rounded according to USGS protocols. For evaluation and reporting, the water-quality data were further combined with physical attributes and classified by lithology, topographic position, physiographic province, region, redox, and pH (as standalone matrix, one row per well). A second data matrix file incorporating minimum reporting levels for censored and low-reported values (set to 0.99X highest common reporting level) was generated for statistical analysis. The two water-quality matrix files, in comma delimited format (.csv) plus a third file that has complete descriptive information for all the water-quality and physical parameters constitute the primary products of the data release.

As part of the U.S. Geological Survey's (USGS) Next Generation Water Observing System (NGWOS) efforts in the Delaware River Basin (DRB), a soil moisture sensing testbed was established at USGS Delaware County Observation Well - DE 723 located in a managed meadow setting in Glen Mills, PA. Traditional in situ soil moisture sensors, a remote sensing cosmic ray neutron sensor (CRNS), and various meteorological sensors were installed to supplement the existing continuous groundwater level time series. This data release includes soil moisture, soil temperature, and precipitation time-series data collected at DE 723 from 1) in situ sensors for measuring soil moisture and soil temperature at varying depths from 5 cm to 100 cm located at four sub-locations (referred to as "pods") in proximity to DE 723 (three remote pods consisting of 3 profiles each and one pod with a single profile co-located at the well); 2) a pressure transducer for measuring groundwater levels from DE 723 (also available on the National Water Information System [NWIS] web at https://waterdata.usgs.gov/monitoring-location/395512075293701); 3) a weighing bucket rain gage for measuring precipitation at DE 723; and 4) a cosmic ray neutron sensor (CRNS) for measuring proximal field-scale soil moisture. Data from each pod (4 locations), the CRNS (1 location), and the well (1 location) are presented in separate text/csv files (6 total). All time-series data is reported in 30-minute intervals from April 1, 2022 to March 31, 2024.

This data release contains analytical results from 52 groundwater samples and six quality assurance and quality control samples collected from central New York and the Upper Hudson River Basin. Samples were collected between June and October, 2022 from 15 production wells and 16 domestic wells in central New York, and 11 production wells and 10 domestic wells in the Upper Hudson River Basin. Of the total wells sampled, 23 were completed in bedrock and 29 were completed in sand and gravel. Samples were collected prior to any treatment or filtration systems, from existing domestic and production wells equipped with permanently installed pumps. Samples were collected and processed using standard USGS methods (see References.csv) and were analyzed for constituents including physicochemical properties, dissolved gases, major ions, nutrients, trace elements, pesticides, volatile organic compounds (VOCs), radiological activity, and indicator bacteria. All analytes are listed with the associated method detection and reporting limits. Samples were analyzed at the USGS National Water Quality Laboratory (NWQL) in Denver, Colorado, and other certified laboratories following published methods (see References.csv).

This dataset contains all publicly-available analytical data collected by the U.S. Geological Survey (USGS) at each location within the Pennsylvania Groundwater Monitoring Network (GWMN) from 2015 to present. Additional analytical data will be appended following the conclusion of each sampling season, and all data is made publicly available in the online National Water Inventory System (NWIS). This dataset serves as a repository for data used by the Pennsylvania Groundwater Monitoring Network map, found here: https://rconnect.chs.usgs.gov/PA_GWMN_map/

This dataset contains all publicly-available analytical data collected by the U.S. Geological Survey (USGS) at each location within the Pennsylvania Groundwater Monitoring Network (GWMN) from 2015 to present. Additional analytical data will be appended following the conclusion of each sampling season, and all data is made publicly available in the online National Water Inventory System (NWIS). This dataset serves as a repository for data used by the Pennsylvania Groundwater Monitoring Network map, found here: https://rconnect.chs.usgs.gov/PA_GWMN_map/

These datasets contain all publicly available analytical data collected by the U.S. Geological Survey (USGS) by the Pennsylvania Pesticides in Vulnerable Groundwaters program between 2021 and 2024. Additional analytical data will be appended following the conclusion of each sampling season. All data is made publicly available in the on-line National Water Information System (NWIS). The Pennsylvania Pesticides in Vulnerable Groundwater program is a long running cooperative effort between USGS and the Pennsylvania Department of Agriculture (PDA). USGS and PDA have sampled for pesticides and a variety of other constituents in domestic groundwater at locations around the state since 2003. Sampling is completed each year in a predetermined hydrogeologic region with an emphasis on agricultural areas. Data from sampling prior to 2021 is not included due to the limited analytical suite that was in use at the time; analytical data from this time can be accessed through NWIS and the Water Quality Portal (WQP).

From May to December 2017, 48 environmental samples and six quality control samples were collected throughout the Upper Hudson and Central New York River Basins. Samples were collected from nine production wells and 11 domestic wells in the Upper Hudson River Basin, and 14 production wells and 14 domestic wells in the Central New York River Basin. Of the total wells sampled, 22 were completed in bedrock and 26 were completed in sand and gravel. Approximately 20 percent of samples were collected from wells that were previously sampled as in 2007 and 2012. Groundwater samples were collected prior to any treatment or filtration systems, from existing domestic and production wells equipped with permanently installed pumps. Samples were collected and processed using standard USGS methods and were analyzed for 372 constituents including physicochemical properties, dissolved gases, major ions, nutrients, trace elements, pesticides, volatile organic compounds (VOCs), radiological activity, and indicator bacteria. All analytes are listed in the data release, along with the associated method detection and reporting limits, some of which changed over time. About 73 percent of constituents analyzed were not detected at concentrations greater than the method detection limit. Samples were analyzed at the USGS National Water Quality Laboratory (NWQL) in Denver, Colorado, and other certified laboratories following published methods. Quality assurance and quality control samples were collected and assessed in each of the sampled basins. In the Upper Hudson River Basin, one replicate was collected at well SA1091, and in the Central New York River Basin, one replicate was collected at well OW1677, and both were analyzed for all constituents. Replicates analyzed for dissolved gases, radionuclides, and indicator bacteria were collected at well RE4784 of the Upper Hudson River Basin and well OT1821 of the Central New York River Basin. Field blanks analyzed for major ions, dissolved solids, nutrients, organic carbon, trace elements, pesticides, and VOCs were collected at well OT1821 and well RE4784. The VOC 1,2,4-Trimethylbenzene was detected in blank samples and most of the groundwater samples, and contamination is suspected from the scintillation liquid in the radon sampling kits. Due to the potential for contamination bias, results for 1,2,4-Trimethylbenzene are not included.

From May to December 2017, 48 environmental samples and six quality control samples were collected throughout the Upper Hudson and Central New York River Basins. Samples were collected from nine production wells and 11 domestic wells in the Upper Hudson River Basin, and 14 production wells and 14 domestic wells in the Central New York River Basin. Of the total wells sampled, 22 were completed in bedrock and 26 were completed in sand and gravel. Approximately 20 percent of samples were collected from wells that were previously sampled as in 2007 and 2012. Groundwater samples were collected prior to any treatment or filtration systems, from existing domestic and production wells equipped with permanently installed pumps. Samples were collected and processed using standard USGS methods and were analyzed for 372 constituents including physicochemical properties, dissolved gases, major ions, nutrients, trace elements, pesticides, volatile organic compounds (VOCs), radiological activity, and indicator bacteria. All analytes are listed in the data release, along with the associated method detection and reporting limits, some of which changed over time. About 73 percent of constituents analyzed were not detected at concentrations greater than the method detection limit. Samples were analyzed at the USGS National Water Quality Laboratory (NWQL) in Denver, Colorado, and other certified laboratories following published methods. Quality assurance and quality control samples were collected and assessed in each of the sampled basins. In the Upper Hudson River Basin, one replicate was collected at well SA1091, and in the Central New York River Basin, one replicate was collected at well OW1677, and both were analyzed for all constituents. Replicates analyzed for dissolved gases, radionuclides, and indicator bacteria were collected at well RE4784 of the Upper Hudson River Basin and well OT1821 of the Central New York River Basin. Field blanks analyzed for major ions, dissolved solids, nutrients, organic carbon, trace elements, pesticides, and VOCs were collected at well OT1821 and well RE4784. The VOC 1,2,4-Trimethylbenzene was detected in blank samples and most of the groundwater samples, and contamination is suspected from the scintillation liquid in the radon sampling kits. Due to the potential for contamination bias, results for 1,2,4-Trimethylbenzene are not included.