Related Topics: Water Research

Water Research Products in the Science Inventory

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Records 1 to 25 of 9608

A high-throughput, automated technique for microplastics detection, quantification, and characterization in surface waters using laser direct infrared spectroscopy
(JOURNAL) [Published : Oct 25, 2022]
A high-throughput approach to detecting, quantifying, and characterizing microplastics (MPs) by shape, size, and polymer type using laser direct infrared (LDIR) spectroscopy in surface water samples is demonstrated. Three urban creeks were sampled for their MP content near Cincin...
Groundwater sustainability in a digital world
(BOOK CHAPTER) [Published : Jul 08, 2022]
Focused on connectivity and enabled by smart technologies, the fourth industrial revolution is creating a digital transformation that is advancing and prompting sustainable groundwater (GW) management practices. Enabled by artificial intelligence, big data, blockchain technology,...
Survey of per- and polyfluoroalkyl substances (PFAS) in surface water collected in Pensacola, FL
(JOURNAL) [Published : Aug 28, 2022]
As the persistence of per- and polyfluoroalkyl substances (PFAS) become a global concern, information about the occurrence and characteristics of PFAS in estuarine and marine ecosystems is poorly represented. In this study, the presence of 51 PFAS were monitored in the Pensacola ...
Office of Research and Development (ORD) Water Quality Benefits Research
(PRESENTATION) [Presented : Nov 29, 2022]
Matt Heberling will briefly discuss ORD's water quality benefits research portfolio that contributes to an EPA collaborative effort to develop a national water quality benefits modeling framework.
Occurrence of Harmful Algal Blooms in Urban Environments
(PRESENTATION) [Presented : Nov 17, 2022]
This project investigates lakes located in three major urban centers in the United States: Cincinnati OH, Kansas City MO/KS and Denver CO. This study aims to determine if there are water quality parameters that are unique to these lakes, and to investigate the correlation between...
Determination of species- and sex-dependent PFAS pharmacokinetics (PK) through Bayesian hierarchical modeling
(PRESENTATION) [Presented : Mar 27, 2022]
The carbon chain length and degree of fluorination of per- and polyfluoroalkyl substances (PFAS) greatly influence its physio- and biochemical properties, resulting in environmental persistence for some compounds. For humans, exposure to numerous PFAS occurs through a variety of ...
Stream nitrogen response to Clean Air Act policies in the US: An application of National Nutrient Inventory and the National Rivers and Streams Assessment
(PRESENTATION) [Presented : Nov 18, 2022]
Air quality regulations have decreased nitrogen (N) and sulfur (S) deposition to the United States (US) landscape over the last several decades. To assess the stream response to declining deposition across the US, we combined the US EPA’s National Nutrient Inventory with N ...
Current breast milk PFAS levels in the US and Canada: After all this time why don’t we know more? (SETAC Abstract)
(PRESENTATION) [Presented : Nov 14, 2021]
Background. Despite twenty years of biomonitoring studies of per- and polyfluoroalkyl substances (PFAS), we have a limited understanding of concentrations in breast milk from the US and Canada. The lack of information on PFAS levels in breast milk and the implications for breastf...
Identifying and Managing Aqueous Film-Forming Foam-Derived Per- and Polyfluoroalkyl Substances in the Environment
(JOURNAL) [Published : Jan 30, 2021]
The use of aqueous film?forming foam (AFFF) has resulted in the widespread occurrence of per? and polyfluoroalkylsubstances (PFAS) in groundwater, drinking water, soils, sediments, and receiving waters throughout the United States and other countries. We present the research and ...
Comparing Equilibrium Concentrations of PCBs based on Passive Sampling and Bioaccumulation in Water Column Deployments.
(PRESENTATION) [Presented : Nov 17, 2022]
Biomonitoring at contaminated sites undergoing clean-up, including Superfund sites, often use bioaccumulation of anthropogenic contaminants by field-deployed organisms as a metric of remedial effectiveness.  Such bioaccumulation studies are unable to assess the equilibrium s...
Fate and transport in environmental quality
(JOURNAL) [Published : Dec 04, 2021]
Changes in pollutant concentrations in environmental media occur both from pollutant transport in water or air and from local processes, such as adsorption, degradation, precipitation, straining, and so on. The terms “fate and transport” and “transport and fate&...
Challenges of Studying Water Storage Tanks in Distribution Systems - a field- and pilot-scale approach to understand the ecosystem
(PRESENTATION) [Presented : Nov 17, 2022]
Finished water storage facilities are tanks or reservoirs used to store water that will undergo no further treatment to reduce microbial pathogens except residual disinfections. Storage tanks are vulnerable to contamination, and excess water retention time may cause depletion of ...
Characterization of chloride and conductivity levels in the Bitter Creek Watershed, WY
(PUBLISHED REPORT) [Published : Aug 01, 2022]
In response to a request for scientific support to assess whether chloride in Bitter and Killpecker Creeks in Wyoming may be naturally high, warranting site-specific criteria, the USEPA Office of Research and Development is providing for USEPA Region 8 use a characterization of b...
Developing and Applying a New Water Quality Integrity Index (WQII) Across the Conterminous United States
(PRESENTATION) [Presented : May 20, 2022]
This presentation provides and overview of our Index of Chemical Integrity in use in Rivers and Streams for the EPA/State program NARS.  The index aggregates a variety of chemical measures into an overall index to reflect aquatic chemical integrity.
Temperature Dependence of Indophenol Method Color Development: Monochloramine, Free Chlorine, or Free Ammonia Concentration Impact
(PRESENTATION) [Presented : Nov 17, 2022]
The Surface Water Treatment Rule (40 CFR 141.74 (a)(2)) requires a detectable disinfectant residual in the distribution system, measured as free or total chlorine, chlorine dioxide or ozone. Total chlorine includes free and combined chlorine. Combined chlorine includes inorganic ...
N2-sparged denitrification reactor promising for small systems
(PRESENTATION) [Presented : Nov 17, 2022]
An innovative N2-sparged heterotrophic denitrification reactor was developed in the lab to select the optimal packing media and compare its treatment and operation performance to a fixed-bed filter. N2 sparging lowers the dissolved oxygen concentration, resulting in a lower aceti...
Chloramine Concentrations within Distribution Systems and Their Relationship on Heterotrophic Bacteria (HPC), Nontuberculous Mycobacteria (NTM) and Disinfection Byproducts (DBPs)
(PRESENTATION) [Presented : Nov 17, 2022]
EPA conducted a research study to understand how maintaining various drinking water distribution system disinfectant residual concentrations (affected by water age or operational practice) corresponded to the microbial communities (heterotrophic bacteria and Mycobacteria) found i...
Finding Lead Service Lines – Tools and Techniques – What Works?
(PRESENTATION) [Presented : Nov 17, 2022]
The presentation will describe recent developments in lead service line identification and verification approaches
Performance and Resilience Analysis of a New York Drinking Water System to Localized and System-Wide Emergencies
(JOURNAL) [To be published : Jan 31, 2023]
Drinking water utilities are vulnerable to both human-caused and natural disasters that can impact the system infrastructure and the delivery of potable water to consumers. Resilience analysis can help utilities identify high-risk areas in their system and understand how to bette...
Challenges in Epidemiological Studies of Water Quality: Temporal and Spatial Availability of Data
(PRESENTATION) [Presented : Aug 20, 2020]
Water quality is a continuing public health issue and therefore requires continued epidemiologic study. However, obtaining water quality data can be challenging. In developed countries water quality is regulated with routine monitoring. The contaminants and regulatory limits for ...
Carbon Dynamic Studies in the San Juan Bay Estuary
(PRESENTATION) [Presented : Nov 17, 2022]
Mangroves sequester significant quantities of organic carbon (C) because of high rates of burial in the soil and storage in biomass. We estimated mangrove forest C storage and accumulation rates in aboveground and belowground components among five sites along an urbanization grad...
Measuring and Modeling Hypoxia in Coastal Ecosystems: From Estuaries to the Coastal Ocean
(PRESENTATION) [Presented : Nov 10, 2022]
Hypoxia in coastal ecosystems is highly spatiotemporally variable and presents significant challenges to measurement and modeling studies aimed at evaluating and simulating hypoxia dynamics. This presentation presents an overview of hypoxia in coastal marine environments, with ca...
EPA Tools & Resources Training Webinar:?The Web-based Interspecies Correlation Estimation (Web-ICE) tool for Ecological Risk Assessment
(PRESENTATION) [Presented : Oct 13, 2022]
Protecting the diversity of species from the adverse effects of chemicals is a significant environmental challenge. Information on the effects of chemicals on species is either very limited or lacking entirely, making management and mitigation of environmental contaminants diffic...
Reviewing Model Deliverables: Is My Model Getting the Right Answer for the Right Reasons?
(PRESENTATION) [Presented : Sep 23, 2022]
Models developed by contractors are a commonly applied tool used by environmental managers to evaluate policy and management decisions. However, models are rarely transparent, and can present numerous challenges to correctly interpret model performance and assess model results. T...
Effects of fine particle sediment on Scleractinian Corals of Florida
(PRESENTATION) [Presented : Jul 20, 2022]
Coral reefs across the state of Florida have declined dramatically in the last 30 years.  The causes of decline include warming coastal waters, intermittent cold water upwellings, disease and watershed stressors, which include excess nutrients, contaminants and sediments. Be...