These data represent surface water and bed sediment samples analyzed for a variety of organic compounds. The samples were collected in streams and rivers in the Chesapeake Bay watershed from 2012-2018. Sites were located in Maryland, Pennsylvania, and West Virginia. Surface water samples were collected from 25 sites and analyzed for estrogenicity and an extensive suite of organic contaminants including hormones, pharmaceuticals, wastewater indicators, pesticides, phytoestrogens, and mycotoxins. Bed sediment samples were collected from 20 sites and analyzed for a suite of organic contaminants including hormones, wastewater indicators, pesticides, and organohalogens. Bed sediment was also analyzed for total organic carbon. Data also include replicate and blank quality assurance samples. This U.S. Geological Survey (USGS) data release contains daily-mean streamflow and water-quality data in the Chesapeake Bay watershed ranging from 2012 to 2018 (beginning and end dates may vary).

Intersex in small- and largemouth bass has been observed in the upper Chesapeake Bay Watershed since 2003. This observation is indicative of exposure to estrogenic endocrine disrupting chemicals. In order to complement biological data sets and better identify the spatial and temporal nature of this end-point, discrete grab water samples were collected throughout the upper Chesapeake Bay Watershed for the evaluation of estrogenic activity. Data reported here are estrogenicity values derived from bioassay screening of OASIS-HLB extracts discrete grab water samples. Estrogenicity was determined using a bioluminescent yeast estrogen screen. Here we report estrogenicity data for selected sites in the Chesapeake Bay water shed collected between 2008 and 2011.

This USGS data release contains station and laboratory method information and geospatial information, as well as concentration results for inorganic and organic compounds and bioluminescent yeast estrogen screen and transgenic zebrafish embryo estrogren bioassay, analyzed at 38 sites in 25 states as part of the Chemical Mixtures and Environmental Effects Pilot Study, 2012-2014.

This USGS data release contains station and laboratory method information and geospatial information, as well as concentration results for inorganic and organic compounds and bioluminescent yeast estrogen screen and transgenic zebrafish embryo estrogren bioassay, analyzed at 38 sites in 25 states as part of the Chemical Mixtures and Environmental Effects Pilot Study, 2012-2014.

These data represent water and bed sediment samples analyzed for a variety of organic compounds. The samples were collected in streams and rivers in the Chesapeake Bay watershed from 2006-2014. Water samples were collected from 61 sites and analyzed for hormones (SH2434 method; Tables 1A and 1B), pharmaceuticals (SH2080 method; Tables 2A and 2B), wastewater indicators (SH1433 method; Tables 3A and 3B), and antibiotics (LCAB method; Tables 4A and 4B). Select water samples were analyzed at the U.S. Geological Survey National Water Quality Laboratory for pesticides (SH2001 method and SH2003 method; Tables 5A/5B and 6A/6B, respectively), wastewater indicators (SH4433 method; Tables 7A and 7B), pharmaceuticals (SH8244 method; Tables 8A and 8B), and hormones (SH4434 method; Tables 9A and 9B). Bed sediment samples were collected from 56 sites and analyzed for wastewater compounds (SH5433 method; Tables 10A and 10B), hormones (SH6434 method; tables 11A and 11B), and organohalogen compounds (LC8093 method; Tables 12A and 12B). Water samples were analyzed for antibiotics at the U.S. Geological Survey Kansas Organic Geochemistry Laboratory. For each of the 12 laboratory methods there are two files, an analyte file (A; analytical method details) and data file (B; site information and analyte concentration if detected). The information can be downloaded in three formats: CSV (comma delimited; alldata-csv.zip), ASCII TXT (tab delimited; alldata-tab-delim-txt.zip), and XLSX (two Excel 2013 files; each dataset is a workbook tab; alldata.for.scibase.part-01.020317.xlsx [Tables 1-4, 10-12], alldata.for.scibase.part-02.020317.xlsx [Tables 5-9]). The Dataset XML file includes an complete list of Analyte Compounds, Compound Groups, CAS Numbers, and USGS NWIS Parameter codes found in each analyte file and associated data file. The analyte file for each method includes analyte compound names, compound group, CAS Number(s), USGS National Water Information System (NWIS) Parameter code, method detection limit, and reporting limit. Compound groups (in alphabetic order) include Androgen, Antibiotics Human and Veterinary, Antidepressant, Antihistamine, Antiviral, Beta-Blocker/Heart, Caffeine/Nicotine, Estrogen, Flame Retardant, Fungicide, Herbicide, Insecticide, Opiate, Persistent Organic Pollutant, Personal Care/Domestic Use (PCDU), Pesticide, Pharmaceutical, Plant/Animal Biochemical (PAB), Plasticizer, Polychlorinated Biphenyl, Polycyclic Aromatic Hydrocarbon, Progesterone, Progestin, and Stimulant/Abuse. The data file for each laboratory method includes State, Network, Sample Number, Station ID, Sample Date, Sample Time, Compound Group, Compound concentration. Network: CHEDC, data collected between 2012-2013 by the Chesapeake Endocrine Disruption project; PAREC, data available from Pennsylvania (other than Chesapeake Endocrine Disruption project samples)(various years listed in headnote); PA012, data available from Pennsylvania collected before 2013; C2007, data collected in Maryland, Virginia, and West Virginia between 2006-2007; CTEM, data collected at sites in West Virginia (various years listed in headnote). Station ID: When available, U.S. Geological Survey National Water Information (NWIS) site number. Sample time is standard time. Table head notes list sample media: filtered or unfiltered water, or bed sediment. Analyte Concentrations Units are listed in the table headnote (micrograms per kilogram OR nanograms per liter); nd denotes non-detect; dnq denotes detected, but not quantified; concentrations in italics denote replicate of previous sample. Site locations (including latitude/longitude) are provided in interactive map viewer, downloadable ESRI ArcGIS Shape file (Chesapeake_Bay_Watershed_water_and_sediment_sampling_sites_for_ScienceBase4.zip), and ArcGIS Mapping Service (REST Service).

These data represent water and bed sediment samples analyzed for a variety of organic compounds. The samples were collected in streams and rivers in the Chesapeake Bay watershed from 2006-2014. Water samples were collected from 61 sites and analyzed for hormones (SH2434 method; Tables 1A and 1B), pharmaceuticals (SH2080 method; Tables 2A and 2B), wastewater indicators (SH1433 method; Tables 3A and 3B), and antibiotics (LCAB method; Tables 4A and 4B). Select water samples were analyzed at the U.S. Geological Survey National Water Quality Laboratory for pesticides (SH2001 method and SH2003 method; Tables 5A/5B and 6A/6B, respectively), wastewater indicators (SH4433 method; Tables 7A and 7B), pharmaceuticals (SH8244 method; Tables 8A and 8B), and hormones (SH4434 method; Tables 9A and 9B). Bed sediment samples were collected from 56 sites and analyzed for wastewater compounds (SH5433 method; Tables 10A and 10B), hormones (SH6434 method; tables 11A and 11B), and organohalogen compounds (LC8093 method; Tables 12A and 12B). Water samples were analyzed for antibiotics at the U.S. Geological Survey Kansas Organic Geochemistry Laboratory. For each of the 12 laboratory methods there are two files, an analyte file (A; analytical method details) and data file (B; site information and analyte concentration if detected). The information can be downloaded in three formats: CSV (comma delimited; alldata-csv.zip), ASCII TXT (tab delimited; alldata-tab-delim-txt.zip), and XLSX (two Excel 2013 files; each dataset is a workbook tab; alldata.for.scibase.part-01.020317.xlsx [Tables 1-4, 10-12], alldata.for.scibase.part-02.020317.xlsx [Tables 5-9]). The Dataset XML file includes an complete list of Analyte Compounds, Compound Groups, CAS Numbers, and USGS NWIS Parameter codes found in each analyte file and associated data file. The analyte file for each method includes analyte compound names, compound group, CAS Number(s), USGS National Water Information System (NWIS) Parameter code, method detection limit, and reporting limit. Compound groups (in alphabetic order) include Androgen, Antibiotics Human and Veterinary, Antidepressant, Antihistamine, Antiviral, Beta-Blocker/Heart, Caffeine/Nicotine, Estrogen, Flame Retardant, Fungicide, Herbicide, Insecticide, Opiate, Persistent Organic Pollutant, Personal Care/Domestic Use (PCDU), Pesticide, Pharmaceutical, Plant/Animal Biochemical (PAB), Plasticizer, Polychlorinated Biphenyl, Polycyclic Aromatic Hydrocarbon, Progesterone, Progestin, and Stimulant/Abuse. The data file for each laboratory method includes State, Network, Sample Number, Station ID, Sample Date, Sample Time, Compound Group, Compound concentration. Network: CHEDC, data collected between 2012-2013 by the Chesapeake Endocrine Disruption project; PAREC, data available from Pennsylvania (other than Chesapeake Endocrine Disruption project samples)(various years listed in headnote); PA012, data available from Pennsylvania collected before 2013; C2007, data collected in Maryland, Virginia, and West Virginia between 2006-2007; CTEM, data collected at sites in West Virginia (various years listed in headnote). Station ID: When available, U.S. Geological Survey National Water Information (NWIS) site number. Sample time is standard time. Table head notes list sample media: filtered or unfiltered water, or bed sediment. Analyte Concentrations Units are listed in the table headnote (micrograms per kilogram OR nanograms per liter); nd denotes non-detect; dnq denotes detected, but not quantified; concentrations in italics denote replicate of previous sample. Site locations (including latitude/longitude) are provided in interactive map viewer, downloadable ESRI ArcGIS Shape file (Chesapeake_Bay_Watershed_water_and_sediment_sampling_sites_for_ScienceBase4.zip), and ArcGIS Mapping Service (REST Service).

This data release presents the results of analyses of biota and water samples collected on multiple dates from 2007 to 2014 at 3 locations in Lake Mead National Recreation Area. Data are presented in 3 spreadsheets containing sample analyses for (1) stable isotopes in biota (2007-2014), (2) synthetic organic compounds in biota (2013-2014), and (3) synthetic organic compounds in water (2013-2014)

Human-use pharmaceutical, pesticide, and wastewater indicator compounds were analyzed at the U.S. Geological Survey, National Water Quality Laboratory, Denver, Colorado, in wadeable streams in 4 Regional Stream Quality Assessments: Northeast (NESQA), Southeast (SESQA), Pacific Northwest (PNSQA) and California (CSQA). Multiple (with few exceptions) samplings occurred at each site, during base flow, between 2014 and 2017. Sites were located in the headwaters of perennial, wadeable streams in urban and agricultural watersheds. Site selection and methodology for each assessment can be found in Van Meter and others (2015), Sheibley and others (2015), Van Meter and others (2017), Coles and others (2016), Van Meter and others (2016), Journey and others (2015), and Van Meter and others (2014). Additional results for this study can be found in Bradley and others, 2020 and Mahler and others, 2020. See cross-reference section for full citation information.

Human-use pharmaceutical, pesticide, and wastewater indicator compounds were analyzed at the U.S. Geological Survey, National Water Quality Laboratory, Denver, Colorado, in wadeable streams in 4 Regional Stream Quality Assessments: Northeast (NESQA), Southeast (SESQA), Pacific Northwest (PNSQA) and California (CSQA). Multiple (with few exceptions) samplings occurred at each site, during base flow, between 2014 and 2017. Sites were located in the headwaters of perennial, wadeable streams in urban and agricultural watersheds. Site selection and methodology for each assessment can be found in Van Meter and others (2015), Sheibley and others (2015), Van Meter and others (2017), Coles and others (2016), Van Meter and others (2016), Journey and others (2015), and Van Meter and others (2014). Additional results for this study can be found in Bradley and others, 2020 and Mahler and others, 2020. See cross-reference section for full citation information.

This dataset presents the results of 475 unique organic compounds collected from 54 wadeable streams within the Southeastern, USA, collected within 10 weeks during 2014. Maximum and median exposure conditions were evaluated in relation to watershed characteristics and for potential biological effects. This dataset contains the summary statistics (maximum and median concentrations)of detected compounds, as well as a summary of quality-assurance (blanks and replicates) samples. Also included are the statistical summaries as related to analyte specific contaminant detection/concentration data and site-specific land-use matrices, spearman-rank correlations, and ToxCast evaluations.