Science Inventory

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  The negative effects of nutrient pollution in streams, rivers, and downstream waterbodies remain widespread global problems. Understanding the cost-effectiveness of different strategies for mitigating nutrient pollution is critical to making informed decisions and definin...

Edge-of-field management practices designed to reduce nutrient pollution in waterways may support or alter critical habitat and ecosystem services in and around agricultural systems. Information on both target and non-target effects is needed to support management decisions as la...

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 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 ...

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...

If a water body in the United States is not as healthy as we’ve decided it should be, the most likely cause is nutrient pollution <span style='mso-element:field-begin'><span style='mso-spacerun:yes'> ADDIN EN.CITE <EndNote><Cite><Author>US...

Targeted conservation approaches seek to focus resources on areas where they can deliver the greatest benefits and are recognized as key to reducing nonpoint source nutrients from agricultural landscapes into sensitive receiving waters. Moreover, there is growing recognition of t...

The U.S. EPA Office of Research and Development, Regions 5, 7 and 8 and EPA Office of Water hosted a multi-regional harmful algal bloom (HABs) workshop on February 4 - 6, 2020 at the University of Kansas Edwards Campus in Overland Park, Kansas. The workshop brought together State...

This is a requested presentation from the Upper Mississippi River Basin Water Quality Task force on EPA ORD's nutrients and harmful algal bloom research in the Mississippi River Basin and Region 7. The presentation covers several research projects related to predicting harmful al...

Update on SSWR Nutrients and HABs research for Region 5 States meeting. This presentation covers research that addresses nutrient pollution and  HABs forecasting. Where possible, we have highlighted nutrient reduction related to nonpoint sources including agriculture and sep...

Targeted conservation approaches seek to focus resources on areas where they can deliver the greatest benefits and are recognized as key to reducing nonpoint source nutrients from agricultural landscapes into sensitive receiving waters. Moreover, there is growing recognition of t...

Excess nutrient release to the environment is a nonpoint source pollution issue in many US surface waters, and thus no single entity has complete jurisdiction to address and solve the problem. While it is within EPA's authority under the Clean Water Act, Clean Air Act, and Safe D...

The East Fork Watershed Cooperative (EFWCoop) leverages expertise to address nutrient pollution in the 892 km2 upper East Fork of the Little Miami River watershed (UEFW) in Southwestern Ohio. The UEFW is 64% agriculture with 422 km2 of row crops (RCs) contributing 71% of the syst...

Targeted conservation approaches seek to focus resources on areas where they can deliver the greatest benefits and are recognized as key to reducing nonpoint source nutrients from agricultural landscapes into sensitive receiving waters. Moreover, there is growing recognition of t...

EPA Office of Research and Development (ORD) principal investigators Chris Nietch, Nate Smucker, Matt Heberling and Erik Pilgrim work with EPA Office of Water colleagues Richard Mitchell, Amina Pollard and Lester Yuan to advance the application of DNA metabarcoding methods in est...

Agricultural best management practices (BMPs) play an important role in reducing nonpoint source pollution.  To increase the adoption of BMPs, a variety of incentive programs exist.  One gaining attention is pay-for-performance (PFP) which uses baseline conditions and m...

As part of federal programs to reduce nutrient pollution, states across the Midwest have developed nutrient reduction strategies, which focus on implementation of agricultural conservation practices (ACPs) or best management practices (BMPs). Despite several decades of federal in...

Lag times in lake response to nutrient reduction efforts make it challenging for stakeholders to develop effective strategies for management and resource allocation. Given the influence of biogeochemical internal cycling and legacy nutrients accumulated within the sediments of ma...

The December 1-2, 2021 BOSC review is focused on the SSWR Nutrients and Harmful Algal Blooms (HABs) Topic, one of the three inter-related topics in the SSWR research portfolio. The Nutrients and HABs Topic consists of three Research Areas (RA): RA4 – Assessment and Manageme...

Complex simulation models are a valuable tool to inform nutrient management decisions aimed at reducing hypoxia in the northern Gulf of Mexico, yet simulated hypoxia response to reduced nutrients varies greatly between models. We compared two biogeochemical models driven by the s...

Agricultural best management practices (BMPs) play an important role in reducing nonpoint source pollution.  A variety of programs exist to encourage the use of BMPs, each with a specific set of objectives.  For example, some pay-for-practice programs provide funds for ...

The core strategy to mitigate nutrient pollution is the implementation of nutrient reduction strategies. These strategies focus on reducing the nutrient mass load to receiving water bodies through conservation/best management practices. Under these strategies, annual nutrient loa...

U.S. EPA’s, Office of Research and Development’s (ORD’s) East Fork Watershed Study (EFWS) centers attention on the integration of water quality modeling and monitoring, excess nutrient management, and the partnership needed to effectively implement nutrient redu...

Linkages between aquatic life impairment and excess nutrients are often difficult to establish to a degree necessary to rationalize concentration and loading targets for reduction and restoration efforts. Data from strategic stream monitoring in the East Fork of the Little Miami ...