The team studies toxicants and pathogens in water resources from their sources, through watersheds, aquifers, and infrastructure to human and wildlife exposures. That information is used to develop decision tools that protect human and wildlife health.
Americans rely on treatment of drinking water and wastewater, and the maintenance of water distribution infrastructure to assure safe water supplies for the public and wildlife. New chemicals are manufactured and used every day. Populations grow and demographics shift. Treatment, conveyance and plumbing infrastructure ages, and new technologies are developed to detect contaminants (toxicants and pathogens) at low levels. Consequently, questions arise about the health effects of exposure to contaminants indivually or in complex mixtures.
The US Geological Survey’s Drinking Water and Wastewater Infrastructure Science Team provides information on processes that affect contaminants as they move from naturally occurring and human-caused sources through aquifers, aquatic environments, and infrastructure. This comprehensive understanding of contaminant profiles from source to exposure is used to develop decision tools to economically, effectively, and efficiently reduce wildlife or human exposure and associated health risks.
The Team prioritizes science in underserved urban and rural agricultural communities and in tribal nations, which are disproportionally impacted by geologic and climatic events, by drinking-water source limitations and resultant dependence on water-reuse and unregulated/unmonitored private-wells.
More Information
Date Visualization: "Drop by Drop" and "PFAS Interactive Tool"
GeoHEALTH–USGS Newsletter-Special Issue on Drinking Water

Questions That the Team Answers:
- Is treated wastewater effluent a source of contaminants to streams that serve as source water for publicly and self-supplied drinking water supplies?
- What contaminants are in tap waters from publicly and self-supplied drinking water sources?
- What factors influence the types of contaminants that are present in tap water?
- Are there hazards to fish and wildlife associated with exposure to low-levels of contaminants in streams that receive wastewater?
- What mitigation actions are the most efficient and cost effective at reducing exposure at the tap for humans? Or in water resources for wildlife?
- Can decision tools be established to to define, prioritize and mitigate human and wildlife health risks?
USGS featured science articles related to this science team’s activities.
Inorganic and Organic Chemical Mixtures Detected in both Public and Private Tap Water in Cape Cod, Massachusetts
Science to Understand Low-Level Exposures to Neonicotinoid Pesticides, their Metabolites, and Chlorinated Byproducts in Drinking Water
Per- and Polyfluoroalkyl Substances (PFAS) in Residential Tap Water: Source-to-Tap Science for Underserved Communities
Mixtures of Organic and Inorganic Chemicals Characterized in Water from the Taps of Residences in the Greater Chicago Area— Science to Understand Contaminant Exposures in Drinking Water
Ongoing Research to Characterize the Complexity of Chemical Mixtures in Water Resources—Urban Stormwater
Pilot Study Provides Information on Contaminant Exposure from Tap Water at Residential and Workplace Sites in the United States
Per- and Polyfluoroalkyl Substances (PFASs) detected in Source Waters and Treated Public Water Supplies
Novel Approach Improves Understanding of Virus Occurrence in Drinking Water
Exploring the Suitability of a Modeling Approach to Estimate Contaminant Occurrence in Drinking Water Sources
Comparison of Predicted and Measured Pharmaceutical Concentrations in Rivers
Sources of Contaminants to Congaree National Park—USGS and National Park Service Working Together
Multi-State Survey Measures Parabens in Municipal Wastewater Biosolids
USGS data releases associated with this science team.
Target-Chemical Concentrations, Exposure Activity Ratios, and Bioassay Results for Assessment of Mixed-Organic/Inorganic Chemical Exposures in Northeast Iowa Private-Well Tapwater, 2018
Target-Chemical Concentrations and Microbiological Results for Assessment of Mixed Contaminant and Biological Exposures in Bottled Water, 2020
Target-Chemical Concentration Results for Assessment of Mixed-Organic/Inorganic Chemical and Biological Exposures in North Dakota and South Dakota Tapwater, 2019
Inorganic Concentration Results for Assessment of Mixed Organic/Inorganic Chemical and Biological Exposures in North Dakota and South Dakota Tapwater, 2019
Concentrations of organic and inorganic constituents in tapwater samples from California in 2020-21 (ver. 3, September 2022)
Pesticides and pesticide transformation product data from passive samplers deployed in 15 Great Lakes tributaries, 2016
Reconnaissance of chemicals of potential biological concern in tributaries of the Great Lakes using passive samplers in 2010 and 2014
Target-Chemical Concentration Results of Mixed-Organic/Inorganic Chemical Exposures in Puerto Rico Tapwater, 2017 to 2018
Pesticide and Pharmaceutical Exposure Data for Select Streams within Great Smoky Mountains National Park, 2019
Data used to model and map arsenic concentration exceedances in private wells throughout the conterminous United States for human health studies
Microbial Source Tracking Marker Concentrations in Congaree National Park in 2017-2019, South Carolina, USA
Target-Chemical Concentration Results of Mixed-Organic/Inorganic Chemical Exposures in Cape Cod, Massachusetts Tapwater, 2018
USGS publications associated with this science team.
Per- and polyfluoroalkyl substances (PFAS) in United States tapwater: Comparison of underserved private-well and public-supply exposures and associated health implications
Predicted aquatic exposure effects from a national urban stormwater study
Juxtaposition of intensive agriculture, vulnerable aquifers, and mixed chemical/microbial exposures in private-well tapwater in northeast Iowa
Bottled water contaminant exposures and potential human effects
Tapwater exposures, effects potential, and residential risk management in Northern Plains Nations
Potential health effects of contaminant mixtures from point and nonpoint sources on fish and frogs in the New Jersey Pinelands
Rapid implementation of high-frequency wastewater surveillance of SARS-CoV-2
Ecological consequences of neonicotinoid mixtures in streams
Arsenic in private well water and birth outcomes in the United States
Temporal variability in TiO2 engineered particle concentrations in rural Edisto River
Pharmaceutical pollution of the world’s rivers
Watershed-scale risk to aquatic organisms from complex chemical mixtures in the Shenandoah River
- Overview
The team studies toxicants and pathogens in water resources from their sources, through watersheds, aquifers, and infrastructure to human and wildlife exposures. That information is used to develop decision tools that protect human and wildlife health.
Americans rely on treatment of drinking water and wastewater, and the maintenance of water distribution infrastructure to assure safe water supplies for the public and wildlife. New chemicals are manufactured and used every day. Populations grow and demographics shift. Treatment, conveyance and plumbing infrastructure ages, and new technologies are developed to detect contaminants (toxicants and pathogens) at low levels. Consequently, questions arise about the health effects of exposure to contaminants indivually or in complex mixtures.
The US Geological Survey’s Drinking Water and Wastewater Infrastructure Science Team provides information on processes that affect contaminants as they move from naturally occurring and human-caused sources through aquifers, aquatic environments, and infrastructure. This comprehensive understanding of contaminant profiles from source to exposure is used to develop decision tools to economically, effectively, and efficiently reduce wildlife or human exposure and associated health risks.
The Team prioritizes science in underserved urban and rural agricultural communities and in tribal nations, which are disproportionally impacted by geologic and climatic events, by drinking-water source limitations and resultant dependence on water-reuse and unregulated/unmonitored private-wells.
More Information
Date Visualization: "Drop by Drop" and "PFAS Interactive Tool"
GeoHEALTH–USGS Newsletter-Special Issue on Drinking Water
The Environmental Health Program's Water and Wastewater Infrastructure Science Team and other USGS Programs are building upon their previous studies to understand sources and occurrence of toxicants and pathogens in aquifers, streams, drinking water facilities and tap waters in homes and residences. This information is used to understand human and wildlife exposure, and to determine if there are any adverse effects upon exposure (Credit: Razmus Y. Kerwin. Public domain.). Sources/Usage: Public Domain. Visit Media to see details.Drinking water in the United States rarely is tested for contaminants and pathogens at the tap, where human exposure can occur. In this special issue, we present the science to help understand contaminants and pathogens in drinking water at business and residential taps. Questions That the Team Answers:
- Is treated wastewater effluent a source of contaminants to streams that serve as source water for publicly and self-supplied drinking water supplies?
- What contaminants are in tap waters from publicly and self-supplied drinking water sources?
- What factors influence the types of contaminants that are present in tap water?
- Are there hazards to fish and wildlife associated with exposure to low-levels of contaminants in streams that receive wastewater?
- What mitigation actions are the most efficient and cost effective at reducing exposure at the tap for humans? Or in water resources for wildlife?
- Can decision tools be established to to define, prioritize and mitigate human and wildlife health risks?
- Science
USGS featured science articles related to this science team’s activities.
Filter Total Items: 26Inorganic and Organic Chemical Mixtures Detected in both Public and Private Tap Water in Cape Cod, Massachusetts
Multiple detections of regulated and unregulated chemical (inorganic, organic) analytes or elements were detected in both privately and publicly supplied tap water samples from 20 residences in Cape Cod, Massachusetts that share a common source of water.Science to Understand Low-Level Exposures to Neonicotinoid Pesticides, their Metabolites, and Chlorinated Byproducts in Drinking Water
Scientists reported the discovery of three neonicotinoid pesticides in drinking water and their potential for transformation and removal during water treatment. The research provides new insights into the persistence of neonicotinoids and their potential for transformation during water treatment and distribution, while also identifying granulated activated carbon as a potentially effective...Per- and Polyfluoroalkyl Substances (PFAS) in Residential Tap Water: Source-to-Tap Science for Underserved Communities
Per- and polyfluoroalkyl substances (PFAS) were detected at low levels in treated drinking water samples from residential taps in the Greater Chicago Area. This study is part of a larger approach to provide an understanding of contaminant mixtures in residential tap water across the Nation including underserved communities in rural, urban, and tribal areas.Mixtures of Organic and Inorganic Chemicals Characterized in Water from the Taps of Residences in the Greater Chicago Area— Science to Understand Contaminant Exposures in Drinking Water
As a component of ongoing research with a coalition of partners, including the U.S. Geological Survey U.S. Environmental Protection Agency, National Institute of Environmental Health Sciences, Colorado School of Mines, University of Illinois Chicago, and University of South Carolina, water was collected from the taps of 45 Chicago-area residences and analyzed for 540 organic and 35 inorganic...Ongoing Research to Characterize the Complexity of Chemical Mixtures in Water Resources—Urban Stormwater
A multiagency reconnaissance study of chemicals in urban stormwater, sampled from pipes or ditches during 50 runoff events at 21 sites in 17 states across the United States, demonstrated that stormwater runoff contains complex mixtures of chemicals including polycyclic aromatic hydrocarbons, pesticides, and pharmaceuticals that are indicative of multiple sources in the watershed.Pilot Study Provides Information on Contaminant Exposure from Tap Water at Residential and Workplace Sites in the United States
The U.S. Geological Survey (USGS), in collaboration with National Institutes of Health, U.S. Environmental Protection Agency, and academia, completed a pilot study to provide information on contaminant exposure from tap water at 26 locations including public and private supplies. Public-supply tap water generally met enforceable standards for those compounds with standards. Samples consisted of...Per- and Polyfluoroalkyl Substances (PFASs) detected in Source Waters and Treated Public Water Supplies
This study, which measured 17 per- and polyfuoroalkyl substances (PFASs) in source and treated public water supplies from 25 drinking water facilities as part of a broader study of contaminants in drinking water across the United States, reports that PFASs were detected in all source water and public water supply samples collected. One sample exceeded the current U.S. Environmental Protection...Novel Approach Improves Understanding of Virus Occurrence in Drinking Water
Waterborne viruses, one of the leading causes of gastrointestinal illnesses, were measured in United States drinking water sources and finished water. Scientists used a combination of measurement and statistical techniques to overcome limitations to quantifying these viruses, thus offering an enhanced method for virus monitoring.Exploring the Suitability of a Modeling Approach to Estimate Contaminant Occurrence in Drinking Water Sources
Scientists explored the suitability of the DeFacto Reuse in our Nation's Consumable Supply (DRINCS) model to estimate the likelihood of contaminants from upstream wastewater discharges to enter drinking water facility intakes.Comparison of Predicted and Measured Pharmaceutical Concentrations in Rivers
New study evaluated if predicted environmental concentrations (PECs) of pharmaceuticals (based on pharmaceutical usage data, degree of metabolism in humans, removal in wastewater treatment plants (WWTPs), and environmental dilution), reflect actual measured environmental concentrations (MECs) in two rivers of different sizes and demographics.Sources of Contaminants to Congaree National Park—USGS and National Park Service Working Together
A National Park Service (NPS) and U.S. Geological Survey (USGS) study determined the concentrations, potential for degradation, and potential for aquatic and terrestrial animal exposure to organic contaminants in water and sediment within the flood-plain/aquatic environments of Congaree National Park which is located downstream from urban and agricultural areas.Multi-State Survey Measures Parabens in Municipal Wastewater Biosolids
This study provides new information about the composition and concentrations of 5 parabens—preservatives in pharmaceuticals and personal care products—present in biosolids collected from 14 municipal wastewater treatment plants across the United States. - Data
USGS data releases associated with this science team.
Filter Total Items: 40Target-Chemical Concentrations, Exposure Activity Ratios, and Bioassay Results for Assessment of Mixed-Organic/Inorganic Chemical Exposures in Northeast Iowa Private-Well Tapwater, 2018
In the United States and globally, contaminant exposure in unregulated private-well point-of-use (POU) tapwater (TW) is a recognized public health data gap and an obstacle to both risk management and homeowner decision making. To help address the lack of data on broad contaminant exposures in private-well TW from hydrologically vulnerable (alluvial or karst) aquifers in agriculturally intensive laTarget-Chemical Concentrations and Microbiological Results for Assessment of Mixed Contaminant and Biological Exposures in Bottled Water, 2020
This data release contains concentration and quality-assurance results for inorganic, organic analytes and microbiological pathogens collected from 30 different commercial bottled water sources. Samples were processed on July 20 and August 17, 2020 at the New Jersey Water Science Center and analyzed at various U.S. Geological Survey laboratories. Samples were analyzed for nutrients, cations and anTarget-Chemical Concentration Results for Assessment of Mixed-Organic/Inorganic Chemical and Biological Exposures in North Dakota and South Dakota Tapwater, 2019
Concentration and quality assurance results for organic compounds and bioassay endocrine activity results analyzed at the U.S. Geological Survey National Water Quality Laboratory, Denver, Colorado, Organic Chemistry Research Laboratory, Sacramento, California, the Organic Geochemistry Research Laboratory, Lawrence, Kansas, and the U.S. Environmental Protection Agency, Office of Research and DeveloInorganic Concentration Results for Assessment of Mixed Organic/Inorganic Chemical and Biological Exposures in North Dakota and South Dakota Tapwater, 2019
This data set reports results for inorganic constituents analyzed at the Redox Chemistry Laboratory in Boulder, Colorado, for the 2019 tapwater study conducted in North Dakota and South Dakota, USA. This project is part of the U.S. Geological Survey, Ecosystems Mission Area, Environmental Health Water and Wastewater Infrastructure Program.Concentrations of organic and inorganic constituents in tapwater samples from California in 2020-21 (ver. 3, September 2022)
This dataset contains the trace elements, cations, anions, disinfection by-products, per- and polyfluoroalkyl substances (PFAS), pharmaceutical and pesticide concentration results for the tapwater study conducted in California, November, 2020 through May, 2021. Trace elements, cations and anions were analyzed at the U.S. Geological Survey Redox Chemistry Laboratory in Boulder, Colorado. The disiPesticides and pesticide transformation product data from passive samplers deployed in 15 Great Lakes tributaries, 2016
This dataset includes pesticides and pesticide transformation products in 15 tributaries of the Great Lakes. Pesticides were monitored using polar organic chemical integrative samplers (POCIS) to estimate concentrations in water following standard protocols (Alvarez, 2010) in June and July 2016. POCIS extracts were analyzed for 225 chemicals (USGS National Water Quality Laboratory schedule 5437, SReconnaissance of chemicals of potential biological concern in tributaries of the Great Lakes using passive samplers in 2010 and 2014
This data set is a compilation of data from two sampling efforts (2010 and 2014), focused on determining the presence and distribution of organic contaminants throughout the United States portion of the Great Lakes watershed. Water-borne contaminants were monitored in 69 tributaries of the Great Lakes using semipermeable membrane devices (SPMDs), and polar organic chemical integrative samplers (POTarget-Chemical Concentration Results of Mixed-Organic/Inorganic Chemical Exposures in Puerto Rico Tapwater, 2017 to 2018
This dataset provides the water-quality results for organic and inorganic concentrations analyzed from samples collected at domestic and commercial tapwater faucets and one spring, sourced in Puerto Rico. Samples were collected in October, 2017 and August and December, 2018 from 19 locations. Samples were analyzed at various U.S. Geological Survey laboratories: the National Water Quality LaboratorPesticide and Pharmaceutical Exposure Data for Select Streams within Great Smoky Mountains National Park, 2019
This dataset included the concentration results (in nanograms per liter) for 328 pharmaceutical and pesticide compounds analyzed within the Great Smoky Mountain National Park, Tennessee and North Carolina, in 2019. Two samples were collected (July and September) at 15 locations within the park, and one location at the park boundary. Samples were analyzed at the National Water Quality Laboratory (NData used to model and map arsenic concentration exceedances in private wells throughout the conterminous United States for human health studies
This data release contains data used to develop models and maps that estimate the probabilities of exceeding various thresholds of arsenic concentrations in private domestic wells throughout the conterminous United States. Three boosted regression tree (BRT) models were developed separately to estimate the probability of private well arsenic concentrations exceeding 1, 5, and 10 micrograms per litMicrobial Source Tracking Marker Concentrations in Congaree National Park in 2017-2019, South Carolina, USA
The dataset contains quantitative polymerase chain reaction data for microbial source tracking markers screened on water samples collected from streams and rivers within and bounding Congaree National Park from samples collected throughout the year from December 2017 through June 2019. The number of samples collected per event ranged from 4-16 over the span of 11 sample events.Target-Chemical Concentration Results of Mixed-Organic/Inorganic Chemical Exposures in Cape Cod, Massachusetts Tapwater, 2018
This dataset provides the water-quality results for organic and inorganic concentrations analyzed from samples collected at residential tapwater faucets, sourced from private drinking water wells in Cape Cod, Massachusetts. Samples were collected in July and August, 2018 from 20 locations. Samples were analyzed at various U.S. Geological Survey laboratories: the National Water Quality Laboratory i - Publications
USGS publications associated with this science team.
Filter Total Items: 94Per- and polyfluoroalkyl substances (PFAS) in United States tapwater: Comparison of underserved private-well and public-supply exposures and associated health implications
Drinking-water quality is a rising concern in the United States (US), emphasizing the need to broadly assess exposures and potential health effects at the point-of-use. Drinking-water exposures to per- and poly-fluoroalkyl substances (PFAS) are a national concern, however, there is limited information on PFAS in residential tapwater at the point-of-use, especially from private-wells. We conductedAuthorsKelly Smalling, Kristin M. Romanok, Paul M. Bradley, Matthew Connor Morriss, James L. Gray, Leslie K. Kanagy, Stephanie Gordon, Brianna Williams, Sara Breitmeyer, Daniel Jones, Laura A. DeCicco, Collin Eagles-Smith, Tyler WagnerByEcosystems Mission Area, Water Resources Mission Area, Cooperative Research Units, Forest and Rangeland Ecosystem Science Center, New Jersey Water Science Center, South Atlantic Water Science Center (SAWSC), Upper Midwest Environmental Sciences Center, Upper Midwest Water Science Center, Utah Water Science CenterPredicted aquatic exposure effects from a national urban stormwater study
A multi-agency study of 438 organic and 62 inorganic chemicals measured in urban stormwater during 50 total runoff events at 21 sites across the United States demonstrated that stormwater discharges can generate localized, aquatic exposures to extensive contaminant mixtures, including organics suspected to cause adverse aquatic-health effects. The aggregated risks to multiple aquatic trophic levelAuthorsPaul Bradley, Kristin Romanok, Kelly Smalling, Jason R. Masoner, Dana W. Kolpin, Stephanie GordonJuxtaposition of intensive agriculture, vulnerable aquifers, and mixed chemical/microbial exposures in private-well tapwater in northeast Iowa
In the United States and globally, contaminant exposure in unregulated private-well point-of-use tapwater (TW) is a recognized public-health data gap and an obstacle to both risk-management and homeowner decision making. To help address the lack of data on broad contaminant exposures in private-well TW from hydrologically-vulnerable (alluvial, karst) aquifers in agriculturally-intensive landscapesAuthorsPaul Bradley, Dana W. Kolpin, Darrin A. Thompson, Kristin Romanok, Kelly Smalling, Sara Breitmeyer, Mary C. Cardon, David M. Cwiertny, Nicola Evans, R. William Field, Michael J. Focazio, Laura E. Beane Freeman, Carrie E Givens, James L. Gray, Gordon L. Hager, Michelle Hladik, Jonathan N. Hoffman, Rena R. Jones, Leslie K. Kanagy, Rachael F. Lane, R. Blaine McCleskey, Danielle Medgyesi, Elizabeth Medlock-Kakaley, Shannon M. Meppelink, Michael T. Meyer, Diana A. Stavreva, Mary H. WardBottled water contaminant exposures and potential human effects
Bottled water (BW) consumption in the United States and globally has increased amidst heightened concern about environmental contaminant exposures and health risks in drinking water supplies, despite a paucity of directly comparable, environmentally-relevant contaminant exposure data for BW. This study provides insight into exposures and cumulative risks to human health from inorganic/organic/micrAuthorsPaul Bradley, Kristin Romanok, Kelly Smalling, Michael J. Focazio, Nicola Evans, Suzanne C. Fitzpatrick, Carrie E Givens, Stephanie Gordon, James L. Gray, Emily M. Green, Dale W. Griffin, Michelle Hladik, Leslie K. Kanagy, John T. Lisle, Keith Loftin, R. Blaine McCleskey, Elizabeth Medlock-Kakaley, Ana Navas-Acien, David A. Roth, Paul F. South, Christopher P. WeisTapwater exposures, effects potential, and residential risk management in Northern Plains Nations
In the United States (US), private-supply tapwater (TW) is rarely monitored. This data gap undermines individual/community risk-management decision-making, leading to an increased probability of unrecognized contaminant exposures in rural and remote locations that rely on private wells. We assessed point-of-use (POU) TW in three northern plains Tribal Nations, where ongoing TW arsenic (As) interveAuthorsPaul Bradley, Kristin Romanok, Kelly Smalling, Michael J. Focazio, Robert Charboneau, Christine Marie George, Ana Navas-Acien, Marcia O'Leary, Reno Red Cloud, Tracy Zacher, Sara Breitmeyer, Mary C. Cardon, Christa K. Cuny, Guthrie Ducheneaux, Kendra Enright, Nicola Evans, James L. Gray, David E. Harvey, Michelle Hladik, Leslie K. Kanagy, Keith Loftin, R. Blaine McCleskey, Elizabeth Medlock-Kakaley, Shannon M. Meppelink, Joshua F. Valder, Christopher P. WeisPotential health effects of contaminant mixtures from point and nonpoint sources on fish and frogs in the New Jersey Pinelands
Aquatic ecosystems convey complex contaminant mixtures from anthropogenic pollution on a global scale. Point (e.g., municipal wastewater) and nonpoint sources (e.g., stormwater runoff) are both drivers of contaminant mixtures in aquatic habitats. The objectives of this study were to identify the contaminant mixtures present in surface waters impacted by both point and nonpoint sources, to determinAuthorsSara Breitmeyer, Heather L. Walsh, Vicki S. Blazer, John F. Bunnell, Patrick M. Burritt, Jeff Dragon, Michelle Hladik, Paul Bradley, Kristin Romanok, Kelly SmallingRapid implementation of high-frequency wastewater surveillance of SARS-CoV-2
There have been over 507 million cases of COVID-19, the disease caused by the severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), resulting in 6 million deaths globally. Wastewater surveillance has emerged as a valuable tool in understanding SARS-CoV-2 burden in communities. The National Wastewater Surveillance System (NWSS) partnered with the United States Geological Survey (USGS) to imAuthorsMeghan M. Holst, John Person, Wiley Jennings, Rory M. Welsh, Michael J. Focazio, Paul Bradley, W. Bane Schill, Amy E. Kirby, Zachary A. MarshEcological consequences of neonicotinoid mixtures in streams
Neonicotinoid mixtures are common in streams worldwide, but corresponding ecological responses are poorly understood. We combined experimental and observational studies to narrow this knowledge gap. The mesocosm experiment determined that concentrations of the neonicotinoids imidacloprid and clothianidin (range of exposures, 0 to 11.9 μg/liter) above the hazard concentration for 5% of species (0.0AuthorsTravis S. Schmidt, Janet L. Miller, Barbara Mahler, Peter C. Van Metre, Lisa H. Nowell, Mark W. Sandstrom, Daren Carlisle, Patrick W. Moran, Paul BradleyArsenic in private well water and birth outcomes in the United States
BackgroundPrenatal exposure to drinking water with arsenic concentrations >50 μg/L is associated with adverse birth outcomes, with inconclusive evidence for concentrations ≤50 μg/L. In a collaborative effort by public health experts, hydrologists, and geologists, we used published machine learning model estimates to characterize arsenic concentrations in private wells—federally unregulated for driAuthorsCatherine Bulka, Molly Scannell Bryan, Melissa Lombard, Scott Bartell, Daniel Jones, Paul Bradley, Veronica Vieira, Debra Silverman, Michael J. Focazio, Patricia Toccalino, Johnni Daniel, Lorraine C. Backer, Joseph D. Ayotte, Matthew O. Gribble, Maria ArgosTemporal variability in TiO2 engineered particle concentrations in rural Edisto River
Titanium dioxide (TiO2) is widely used in engineered particles including engineered nanomaterial (ENM) and pigments, yet its occurrence, concentrations, temporal variability, and fate in natural environmental systems are poorly understood. For three years, we monitored TiO2 concentrations in a rural river basin (Edisto River, < 1% urban land cover) in South Carolina, United States. The total conceAuthorsMd Mahmudun Nabi, J. Wang, Celeste A. Journey, Paul Bradley, Mohammed BaaloushaPharmaceutical pollution of the world’s rivers
Environmental exposure to active pharmaceutical ingredients (APIs) can have negative effects on the health of ecosystems and humans. While numerous studies have monitored APIs in rivers, these employ different analytical methods, measure different APIs, and have ignored many of the countries of the world. This makes it difficult to quantify the scale of the problem from a global perspective. FurthAuthorsJohn L. Wilkinson, Alistair B. A. Boxall, Dana W. Kolpin, Kenneth M. Y. Leung, Racliffe W. S. Lai, Cristóbal Galbán-Malagón, Aiko D. Adell, J. Mondon, M. Metian, R. Marchant, Alejandra Bouzas-Monroy, Aida Cuni-Sanchez, A. Coors, Carriquiriborde P., M. Rojo, C. Gordon, Magdalena Cara, M. Moermond, Thais Luarte, V. Petrosyan, Yekaterina Perikhanyan, Clare S. Mahon, Christopher J. McGurk, T. Hofmann, T. Kormoker, V. Iniguez, J. Guzman-Otazo, Jean L. Tavares, Francisco Gildasio de Figueiredo, Maria T. P. Razzolini, V. Dougnon, G. Gbaguidi, Oumar Traoré, Jules M. Blais, Linda E. Kimpe, M. Wong, D. Wong, R. Ntchantcho, J. Pizarro, Guang-Guo Ying, Chang-Er Chen, Martha Páez, Jina Martínez-Lara, Jean-Paul Otamonga, John Poté, Suspense A. Ifo, Penelope J. Wilson, Silvia Echeverría-Sáenz, N. Udikovic-Kolic, M. Milakovic, D. Fatta-Kassinos, L. Ioannou-Ttofa, Vladimíra Belušová, J. Vymazal, María Cárdenas-Bustamante, Bayable A. Kassa, J Garric, A. Chaumot, Peter Gibba, I. Kunchulia, Seidensticker S., G. Lyberatos, Halldór P. Halldórsson, Molly Melling, T. Shashidhar, Manisha Lamba, A. Nastiti, A. Supriatin, N. Pourang, A. Abedini, Omar Abdullah, Salem S. Gharbia, F. Pilla, B. Chefetz, T. Topaz, Koffi Marcellin Yao, B. Aubakirova, R. Beisenova, L. Olaka, Jemimah Mulu, P. Chatanga, V. Ntuli, Nathaniel T. Blama, S. Sherif, Ahmad Zaharin Aris, Ley Juen Looi, M. Niang, Seydou T. Traore, Rik Oldenkamp, O. Ogunbanwo, M. Ashfaq, M. Iqbal, Z. Abdeen, A. O'Dea, Jorge Manuel Morales-Saldaña, M. Custodio, H. de la Cruz, I. Navarrete, F. Carvalho, Alhaji B. Gogra, Bashiru M. Koroma, Vesna Cerkvenik-Flajs, Mitja Gombać, M. Thwala, K. Choi, H. Kang, John L. Celestino Ladu, A. Rico, P. Amerashinghe, A. Sobek, G. Horlitz, Armin K. Zenker, Alex C. King, Jheng-Jie Jiang, Rebecca Kariuki, M. Tumbo, U. Tezel, Turgut T. Onay, Julius B. Lejju, Y. Vystavna, Y. Vergeles, H. Heinzen, Andrés Pérez-Parada, Douglas B. Sims, M. Figy, David Good, C. TetaWatershed-scale risk to aquatic organisms from complex chemical mixtures in the Shenandoah River
River waters contain complex chemical mixtures derived from natural and anthropogenic sources. Aquatic organisms are exposed to the entire chemical composition of the water, resulting in potential effects at the organismal through ecosystem level. This study applied a holistic approach to assess landscape, hydrological, chemical, and biological variables. On-site mobile laboratory experiments wereAuthorsLarry Barber, Kaycee E. Faunce, David Bertolatus, Michelle Hladik, Jeramy Jasmann, Steffanie H. Keefe, Dana W. Kolpin, Michael T. Meyer, Jennifer L. Rapp, David A. Roth, Alan M. Vajda