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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...

Anthropogenic nutrient loading has resulted in eutrophication and habitat degradation within estuaries. Study of eutrophication in estuaries has often focused on larger systems, while there has been increasing interest in understanding the governing processes in smaller systems. ...

The development of ecological benchmark values for major ions in fresh water is challenging and a site-specific method based on laboratory tests of synthetic ion mixtures has recently been published by Brent et al. (2022). &nbsp;Although the method has some appealing attributes, ...

The purpose of this letter is to correct previously reported blood serum concentrations for PFO5DoA in people in Wilmington, North Carolina (NC), in 2017-2018 [1]. Perfluoro-3,5,7,9,11-pentaoxadodecanoic acid (known as PFO5DoA; Chemical Abstracts Service Number [CASN] 39492-91-6,...

Dissolved reactive phosphorus (DRP) export from agricultural areas is a leading cause of nutrient pollution in freshwater systems (e.g., the North American Great Lakes). A potential solution to mitigate the excessive release of DRP is the use of nutrient management. To evaluate t...

Reduced tillage management conservation practices (No-till and Reduced-till) are widely adopted in agriculture; however, understanding their overall effectiveness for water quality protection is challenging. A meta-analysis was conducted to understand and quantify the effectivene...

Lake Erie is threatened by eutrophication and harmful algal blooms due to excess nutrient loading from agricultural sources. To reduce nutrient loading to Lake Erie, widespread adoption of agricultural conservation practices (ACPs) has been proposed. However, identifying appropri...

Hypoxia, or low dissolved oxygen (DO), is a widespread water quality problem affecting estuaries and coastal waters around the world. Water quality criteria for DO have been established for every estuary in the US and are an important part of the regulatory response to nutrient p...

Indigenous nations and communities in the United States have rights as sovereign governments to exercise control and ownership over all data and information generated by or from the tribes, tribal members, or tribal resources. Indigenous nations exercise these rights through data...

EPA&rsquo;s Report on the Environment (ROE) brings together the most reliable and readily available indicators to create a comprehensive view of the nation&rsquo;s environmental and human health status and trends. The indicators provide an objective basis for Agency decision maki...

South Florida is a subtropical environment with diverse ecological and human communities that rely on a complex water system undergoing the costliest restoration in U.S. history. Pesticide and metal input to the aquatic systems of South Florida can impact the capabilities of main...

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...

The Geostationary Littoral Imaging and Monitoring Radiometer (GLIMR) will provide high temporal frequency observations of the United States coastal waters. The spatial, temporal, and radiometric resolutions of GLIMR are evaluated and compared to other satellites typically used fo...

General overview of the Cyanobacteria Assessment Network (www.epa.gov/cyanoproject) current technology, software, and data. A future look of using Sentinel-2 higher resolution imagery and forecasting will also be provided.

Over the last decade, applications of non-target analysis (NTA) for environmental monitoring have detected dozens of novel PFAS in the Cape Fear Region (CFR) of North Carolina including GenX (HFPO-DA), Nafion byproduct 2 (BP2), and perfluoroether carboxylic acids with four (PFO4D...

Industrial producers and users of per- and polyfluorinated alkyl substances (PFAS) have been a major source of chemical contamination due to historical releases of legacy PFAS. Following the general phase-out of legacy PFAS such as PFOA/PFOS, industrial usage has shifted to alter...

Brief overview of Earth Observation science and water quality for middle to high school age children.

Cyanobacterial harmful algal blooms (CyanoHABs) produce excessive amounts of cyanotoxins, mainly microcystins (MCs) and anatoxins (ATXs), significantly threatening aquatic ecosystems and public health. Accurately predicting CyanoHABs is essential to develop effective CyanoHAB pre...

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...

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 ...

Many public utilities that use chloramine as a secondary disinfectant have adopted an annual maintenance practice called chlorine-burn. Chlorine-burn is a practice whereby free chlorine is permitted to flow through the distribution network for two to eight weeks. The purpose of a...

It is estimated there are more than 500,000 abandoned mines in the United States, and many of the highly toxic and dangerous mines are listed on the Superfund National Priority List (NPL). In EPA Region 8; mines, smelters, and mills make up more than 50% of the NPL sites, and EPA...

Abstract: This presentation will cover recent research on nutrient inputs, agricultural management and nitrate concentrations in soil solution and groundwater in the southern Willamette Basin&rsquo;s Groundwater Management Area (GWMA).&nbsp;Non-point sources are the predominant i...

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...