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This presentation will cover EPA ORD's work to use human mobility data derived from cellular device locations to estimate visitation to natural areas, including beaches and parks. We will cover our process, results and published results. We will discuss the current and future pla...

EPA is peer reviewing the Agency’s report modeling the relationship between lead in drinking water and blood lead levels in children utilizing the Integrated Exposure Uptake Biokinetic (IEUBK) model. The report being peer reviewed may be used to inform the derivation of a concent...

EPA has finalized the IRIS Toxicological Review of Perfluorodecanoic Acid (PFDA) and Related Salts. This assessment addresses the potential cancer and noncancer human health effects from exposure to PFDA and related salts. EPA’s program and regional offices may use this assessmen...

In July 2024, EPA finalized the IRIS Toxicological Review of Perfluorodecanoic Acid (PFDA) and Related Salts. The Toxicological Review was reviewed internally by EPA and by other federal agencies and White House Offices after public release in April 2023. Consistent with the May ...

Many benthic indices have been created in the last two decades for monitoring coastal ecosystems, however direct comparisons between indices are often difficult. To address this, M-AMBIUS has replaced regional indices used by the US Environmental Protection Agency. Objectives of ...

Maui’s water basins are an engineering tool to facilitate precipitation of sediment during weather events. Unfortunately, these basins only facilitate the precipitation of coarse sediment grain sizes, leaving the finer sediment to overflow into the ocean. As fine sediment h...

In volcanic mountains, complex subsurface architecture can have a significant impact on subsurface water dynamics. Despite this, the degree to which geomorphic landscape features (e.g., colluvial deposits, glacial features, and active earthflows) influence subsurface water dynami...

Headwater streams play a crucial role in the landscape as sources of water and solutes to downstream locations. These streams are diverse and influenced by local physiography (geology, geomorphology) and meteorological factors, such as the amount and form of precipitation inputs....

Conductivity is an important indicator of the health of aquatic ecosystems and is linked to anthropogenic activity. Understanding patterns and drivers of conductivity is important for effective management. We modeled lake conductivity data (n = 3,311) collected as part of the U.S...

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...

The National Aquatic Resource Surveys (NARS) program has been monitoring water chemistry and reporting on the condition of water quality for over 15 years.  These data may be of particular interest to efforts to construct natural capital accounts, such as those being conduct...

The National Aquatic Resource Surveys (NARS) were designed to provide a statistically robust evaluation of the condition of the nation's waters. Research is needed to adapt these national datasets to better address state and regional resource management more local needs, par...

Poly- and perfluoroalkyl substances (PFAS) are known as “forever chemicals” due to their ubiquitous environmental persistence and adverse human health effects. Short-chain PFAS are of increasing concern due to their high solubility and mobility in the water while poss...

The 1985 Guidelines for Deriving Numerical National Water Quality Criteria for the Protection of Aquatic Organisms and Their Uses (1985 Guidelines) recommends that test data be available for a minimum of eight families to fulfill taxonomic minimum data requirements (MDRs) in orde...

EPA is a support agency under the National Response Framework's ESF#11.  This presentation will describe what the EPA's role is in animal health emergencies and give an update on the carcass grinding research effort being done with USDA. There are three key takeaways: 1) Was...

<div class="-ZQ-739 " aria-label="11. Please enter your work product description/abstract (400 characters max). **This section MUST be different from the impact/purpose statement section below.** Please do not use terms such as "sub-product" or other i...

Water quality managers in the State of California and researchers abroad in the UK are applying effects-based methods and developing standard operating procedures and multi-level screening models to more efficiently screen water quality. Specifically the State of California has i...

This forecasting approach may be useful for water managers and associated public health managers to predict near-term future high-risk cyanobacterial harmful algal blooms (cyanoHAB) occurrence. Freshwater cyanoHABs may grow to excessive concentrations and cause human, animal, and...

The use of quantitative real-time PCR (qPCR) to estimate Enterococcus spp. levels allows for same day notification of recreational water quality conditions, representing a major advance over traditional cultured-based methods that require 18 or more hours to obtain results. &nbsp...

Genetic technologies are now available that can provide same day notification of fecal pollution levels using enterococci and E. coli, as well as provide fecal pollution information for human, ruminant, canine, and avian sources in recreational water samples.  These methodol...

I investigated the practice of managed aquifer recharge (MAR) of mountain front runoff in the Central Valley of California, USA, as a strategy to improve groundwater storage and availability to community drinking water wells.  The area of interest of the modeling study is th...

The U.S. Environmental Protection Agency’s Office of Research and Development (ORD) has been using Hester-Dendy (HD) multi-plate artificial substrate samplers as part of their standard monitoring protocols for over a decade at Great Lakes Area of Concern (AOC) sites. To bet...

Most of us are comfortable with a research framework that starts with foundational knowledge from the literature and builds on our own work to date. This allows us to ask new iterations of these questions focused on the environment. However, sometimes we want to extend our resear...

Determining how colonization condition affects the structure of the macroinvertebrate community in stream mesocosm studies is important for experimental design and understanding the relevance of exposure studies. Until recently, dosing study priorities for the USEPA Experimental ...

Stream tributaries can be impacted by a myriad of fecal pollution sources that contribute to water quality impairment in receiving waters.  Strategic water quality monitoring of tributaries can enhance the ability to identify fecal pollution sources to better protect human h...