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Stable isotope ratios integrate, indicate, record, and trace fundamental processes in hydrology and ecology.&nbsp; Stored within the atoms of samples, stable isotope ratios of specific elements unlock stories about ecological processes that impact water quality and quantity.&nbsp...

Drinking water storage tanks serve several important functions, which include but are not limited to providing an adequate water supply in the case of firefighting emergencies, power outages, water main breaks, or other system failures. The water level elevation in storage tanks ...

Plastic pollution is ubiquitous worldwide. Smaller pieces of plastic (<5 mm) denominated as microplastics (MPs) are of particular concern because they can be easily transported throughout the environment. As they travel, MPs can adsorb chemicals or nutrients, and develop a biofil...

The analysis of contaminants of emerging concern (CECs) has been an ongoing priority due to their potential for adverse effects on environmental and human health. Wastewater is a source for many CECs, and surface waters that receive wastewater discharge often serve as source wate...

This study provides step-by-step guidance for practitioners and local stakeholders on how to use existing study results to conduct benefit transfer (BT), and ultimately make informed predictions of how improvements in lake water clarity may benefit surrounding communities. The pr...

Seven-day sublethal toxicity tests were performed with the freshwater invertebrates&nbsp;Ceriodaphnia dubia,&nbsp;Hyalella azteca, and&nbsp;Chironomus dilutus&nbsp;to determine the effects of per- or polyfluorinated alkyl substances (PFAS) of varying chain length within four clas...

This is a requested presentation for the Association of Clean Water Administrators (ACWA) that discusses how ORD is the research arm of the EPA and provides the scientific foundation for EPA to execute its mandate to protect human health and the environment. An overview of the 6 ...

Aquatic ecosystem responses to wildfire can vary widely depending on the characteristics of fire and the spatial context of where a fire takes place. Assessment of wildfire risk to aquatic ecosystems requires an understanding of sources of such variability (see Ebersole et al. th...

Wildfire risk to aquatic ecosystems in the Pacific Northwest is a growing concern, but this risk is not equally distributed across the region. Furthermore, risks vary among valued endpoints and may be perceived differently by drinking water providers, forest managers, and fish bi...

Global shifts in climatic conditions and anthropogenic disturbances are dramatically modifying the Earth&rsquo;s ecosystem. Ensuring water security, availability, and quality within this context largely depends on how accurately we can map Global Surface Water Extents (GWSE). Map...

This presentation will review the latest research on inputs, budgets, effects, legacies and management related to non-point source nutrient pollution.&nbsp; Using examples of phosphorus budgets at the national, regional and local scales, Jana Compton from EPA&rsquo;s Pacific Ecol...

These workshops will be platform to present recent research at EPA as it relates to best practices in site characterization, sample analysis, and suitable treatment technologies for mining, persistent organic pollutants, and microplastics. The first presentation will be expanding...

Climate change has created the need for innovate methods for the management of groundwater and the augmentation of groundwater supplies in areas that are susceptible to drought as well as other climate related problems such as saltwater intrusion. This will create an enhanced dep...

With the declining tailpipe emissions from the US and worldwide motor vehicle fleet, impacts of tire and brake wear are an increasingly important area of interest.&nbsp; Recent research has shown the compound 6PPD used in tires as an anti-degradation chemical reacts with ozone to...

This work investigated the suitability of three non-hazardous food dyes as PFAS simulants during wastewater treatment with powdered activated carbon (PAC). Data from batch experiments with PAC revealed equilibrium constants (Log Kd) and pseudo first-order adsorption rate constant...

Permafrost soils store &sim;50% of terrestrial C, with Yedoma permafrost containing &sim;25% of the total C. Permafrost is undergoing degradation due to thawing, with potentially hazardous effects on landscape stability and water resources. Complicating ongoing efforts to project...

Background and Purpose Biosolids are treated sewage sludge produced as a byproduct of the wastewater treatment process, often applied to land or disposed of in landfills. Under the Clean Water Act, the US EPA Office of Water (OW) has the responsibility to protect human health and...

Modeling large-scale hydrological impacts brought about by site-level green and gray stormwater remediation actions is difficult because urbanized areas are extremely complex dynamic landscapes that include engineered features that, by design, expedite urban runoff to streams, ri...

Presentation to Southwest Ohio Water Environment Association Industrial Waste Seminar.&nbsp; Overview of the Renewable Fuel Standard and its relation to wastewater utility biogas production.

Whole Effluent Toxicity (WET) test methods for measuring the toxicity of effluents and receiving waters are found in 40 CFR Part 136. Short-term chronic freshwater toxicity test methods include the use of three species &ndash; a cladoceran (Ceriodaphnia. dubia), the fathead minno...

The purpose of the study on health effects and toxicity is to develop data, methods, and tools to advance the understanding of adverse health impacts among people, other animals and plants that are associated with exposure to harmful algal blooms (HABs) from both planktonic and b...

Presentation that outlines the process for developing a research plan for a BILS funded research project that is designed to develop validatable methods for detection and quanitation of emerging and historically important pathogens in raw and treated wastewater.

Presentation outlining prospective dissertation research on the Fate and Transport of wastewater linked contaminants. Research investigates the environmental, spatial, temporal, and laboratory methodological trends in monitoring wastewater impacts to surface water.

The purpose of this lecture is to provide a summary of the EPA's research activities with regards to waterborne protozoa with specific emphasis on methods development to detect Cryptosporidium Giardia, and Toxoplasma gondii.

Wastewater is a source for many contaminants of emerging concern (CECs) and surface waters receiving wastewater discharge often serve as source water for downstream drinking water treatment plants. Non-targeted analysis and suspect screening methods were used to characterize chem...