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Eutrophication of inland lakes poses various societal and ecological threats, making water quality monitoring crucial. Satellites provide a comprehensive and cost-effective supplement to traditional in situ sampling. The Sentinel-2 MultiSpectral Instrument (S2 MSI) offers unique ...

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...

Few field methods are available for characterizing source zones impacted with aqueous film forming foam (AFFF). Non-invasive geophysical characterization of AFFF source zone contamination in situ could assist with the delineation and characterization of these sites, allowing for ...

Traditionally, chemical toxicity is determined by in vivo animal studies, which are low throughput, expensive, and sometimes fail to predict compound toxicity in humans. Due to the increasing number of chemicals in use and the high rate of drug candidate failure due to toxicity, ...

Understanding vapor intrusion (VI) temporal variability is key for the design of sampling strategies intended to assess reasonable maximum exposure of indoor air concentrations of volatile organic compounds (VOCs) as well as risk evaluation and mitigation planning. VI temporal va...

Impervious surface cover increases peak flows and degrades stream health, contributing to a variety of hydrologic, water quality, and ecological symptoms, collectively known as the urban stream syndrome. Strategies to combat the urban stream syndrome often employ engineering appr...

Conventional mining-influenced water (MIW) treatment technologies are expensive to operate and maintain, require frequent labor, materials input, and sampling, and produce large quantities of treatment-generated solids that must be managed. In 2019, EPA&rsquo;s Office of Superfun...

Benthic rapid assessment tools are needed to close the gap between sample collection and analysis so managers can better evaluate ecological response to management actions and environmental conditions. Sediment profile imaging (SPI) captures the top centimeters of sediment in cro...

US EPA has previously published a decision support tool (River Basin Export Reduction Optimization Support Tool, RBEROST) populated with data for the Upper Connecticut River Basin to allow stakeholders to determine the least-cost management strategies to meet nitrogen and phospho...

US EPA has previously published a decision support tool (River Basin Export Reduction Optimization Support Tool, RBEROST) populated with data for the Upper Connecticut River Basin to allow stakeholders to determine the least-cost management strategies to meet nitrogen and phospho...

US EPA has previously published a decision support tool (River Basin Export Reduction Optimization Support Tool, RBEROST) populated with data for the Upper Connecticut River Basin to allow stakeholders to determine the least-cost management strategies to meet nitrogen and phospho...

This presentation will be given at Air &amp; Waste Management Association's The Science of PFAS Conference. It provides a general overview of Other Test Method 50, a recently released method for analyzing volatile fluorinated compounds from sources. The method's applicability, sa...

In-situ measurements of optically active indicators of water quality are used to develop and validate spatiotemporally robust and cost-effective satellite remote sensing algorithms. Outputs from water quality algorithms routinely inform policymaker decisions that impact environme...

Urban areas are built environments containing substantial amounts of impervious surfaces (e.g., streets, sidewalks, roof tops). These areas often include elaborately engineered drainage networks designed to collect, transport, and discharge untreated stormwater into local surface...

Marine mesoscale studies with sandworms (Alitta virens) were conducted to isolate important processes governing the exposure and bioaccumulation of polychlorinated biphenyls (PCBs) at contaminated sediment sites.&nbsp;Ex situ&nbsp;equilibrium sampling with silicone-coated jars, a...

The Sample Collection Plan (SCP) Template Tool for Addressing Radiochemical Analytes in Environmental Matrices is intended to provide a “ready-to-go” outline for creating a SCP in EPA-report format. The Tool provides a general description of the types of information and sections ...

Over the last 30 years, several models have been developed to predict bioaccumulation for assessing and managing the risks associated with contaminated sediment sites. These models include simple ratios of biota to sediment concentrations (i.e., biota-sediment accumulation factor...

Drinking water nitrate contamination is a significant economic and public health concern in The Great Plains, with few tested best practices for improving source water quality. This project seeks to establish a monitoring framework for quantifying the benefits of soil health prac...

The development of field-scale, in situ screening technologies is crucial for assessing aqueous film forming foam (AFFF) source zones at former fire training and storage sites, which are long-term sources of per- and polyfluoroalkyl substances (PFAS) contamination. Spectral induc...

Due to some Per and Polyfluoroalkyl substances (PFAS) having both hydrophilic and hydrophobic components on the same structure, they are often found at the interface between air and water. This behavior results in PFAS concentrating in the surface microlayer. When surface water i...

Long term monitoring using standardized repeated measures is an invaluable approach not only for early detection of non-native aquatic species (NAS), but also for understanding rates of invasion and for assessing the impacts of relevant changes to recipient systems (e.g. climate ...

Storm sewer system outfall discharges can be a source of human sewage potentially harboring clinically relevant antibiotic resistance (AR) bacteria and their genes. &nbsp;These drainage networks primarily collect and discharge untreated stormwater from rain events (&lsquo;wet&rsq...

The Tap Water Analysis Project was a multi-year study that used targeted and non-targeted analysis (NTA) methods to survey chemical contaminants in drinking water from five regions across the state of California. For the NTA portion of the project, activated carbon point-of-use (...

Benthic harmful cyanobacteria blooms (HCBs) pose a significant threat to domestic animals, wildlife, and humans. They are a growing concern especially in the west. State, tribal, and local agencies need greater understanding of the risk posed by benthic HCBs. While The Interstate...

U.S. states, tribes, and local agencies need consistent approaches to characterize the relative risk posed by harmful benthic cyanobacteria proliferations and to inform mitigation practices. USEPA is addressing this need with multi-year, multi-site field research and controlled e...