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In the northern Gulf of Mexico, nutrients from upstream agricultural fertilization and river runoff are delivered to the Louisiana Continental Shelf (LCS) via the Mississippi-Atchafalaya river basin. This increased nutrient loading stimulates a phytoplankton bloom; as the resulti...

Coastal watersheds have become increasingly urbanized resulting in declines in ecosystem goods and services (EGS) to community beneficiaries. Urbanization includes increases in impervious surface, decreases in access to greenspace, and declines in both air and water quality. The ...

In this work, we assess the techno-economic and social performance of preventing and controlling phosphorus releases from municipal wastewater effluents in local communities. This multicriteria assessment framework accounts for the effects of the economies of scale and the popula...

Pages 150-167 of Lake Michigan 2020 Report Lake Michigan has undergone substantial biological change in the lower food web, as evidenced by lake-wide changes in primary productivity (Stadig et al., 2020), zooplankton abundance and composition (Barbiero et al., 2019), fish recruit...

The seasonal occurrence of deep-water hypoxia in western Long Island Sound (LIS) has been documented for decades by water quality cruise surveys and fixed mooring buoys. While previous studies have focused on factors modulating bottom dissolved oxygen (DO) at subtidal timescales,...

Watersheds in the Wisconsin portion of the Lake Superior basin, specifically those in the red clay plains, are susceptible to degraded water quality from eroding stream banks, which can impact in-stream habitat and result in excessive nutrient loading (WDNR 2007a). Watershed cons...

The six PFAS we have studied (PFOA, GenX, PFMOAA, PFOS, NBP2, PFHxS) produced multiple common effects across all compounds, however the compounds were not toxicologically identical.&nbsp; Effects common across all compounds included reduced pup and maternal bodyweights, reduced p...

EPA is developing new, rapid methods for monitoring water quality at beaches to determine adequacy of water quality for swimming. The methods being developed rely upon quantitive polymerase chain reaction technology. They will permit real time decisions regarding beach closures...

To assess the consequences of nutrient reduction strategies on water quality under climate change, we investigated the long-term dynamics of dissolved oxygen (DO) and pH in Narragansett Bay (NB), a warming urbanized estuary in Rhode Island, where nitrogen loads have declined due ...

Altered lake hydrology is an emerging, widespread threat as changing climate conditions and increasing human water use place greater pressure on water resources. Dam and land use management can significantly alter lake water-level regimes and flow characteristics, which in turn c...

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 (...

Communities are searching for technologies to remove and destroy toxic per- and polyfluoroalkyl substances (PFAS), especially when these chemicals are in their drinking water. PFAS have been used in applications such as fire-fighting foam,&nbsp;cosmetics, water- and fire-resistan...

Legionella pneumophila (Lp) is an opportunistic pathogen that causes respiratory infections primarily through inhalation of contaminated aerosols. Lp can colonize premise plumbing systems due to favorable growth conditions found within those environments (e.g. lower disinfectant ...

Contamination of surface waters often leads to drinking water contamination, degradation of aquatic biota and their habitat and ultimately the decline of the quality of life for both humans and animals. Pathogen contamination, as determined by bacterial fecal indicators, is the l...

The US EPA uses exposure and toxicity information and risk assessments to protect human health and the environment from known hazards. However, some of the chemicals we are exposed to are unknown, undetected, and unregulated. Discovering the identity of unknown chemicals with mas...

On September 1, 2020, EPA published the final regulation, Use of Lead Free Pipes, Fittings, Fixtures, Solder, and Flux for Drinking Water. EPA made&nbsp; the conforming changes to existing regulations based on the Reduction&nbsp; of Lead in Drinking Water Act of 2011 and the Comm...

Lead can enter drinking water when service pipes that contain lead corrode, especially where the water has high acidity or low mineral content that corrodes pipes and fixtures. Homes may also have internal plumbing materials containing lead. To reduce exposure to lead in drinking...

Lead service lines (LSL) represent the greatest source of lead (Pb) in drinking water. Identifying LSLs can be challenging, and recent service line (SL) material surveys in Michigan, Illinois, Wisconsin and Indiana found that an average 16% of SLs in these states are unknown and ...

Poly- and perfluoroalkyl substances (PFAS) are oxidatively recalcitrant organic synthetic compounds. PFAS are an exceptional group of chemicals that have significant physical characteristics due to the presence of electronegative fluorine. PFAS persists in the environment, bioacc...

The U.S. Environmental Protection Agency and Sandia National Laboratories have developed the Water Network Tool for Resilience (WNTR) to quantify resilience of drinking water distribution systems. WNTR is a Python package designed to simulate disaster scenarios and analyze impact...

Legionella pneumophila (Lp) is an opportunistic pathogen that causes respiratory infections primarily through inhalation of contaminated aerosols. Lp can colonize premise plumbing systems due to favorable growth conditions found within those environments (e.g. lower disinfectant ...

The National Aquatic Resource Surveys (NARS) program, a collaboration among United States Environmental Protection Agency (US EPA) Office of Water, Office of Research and Development (ORD), and states and tribes, assesses progress towards the objective of the Clean Water Act thro...

EPA-ORD-CPHEA's Michael Pennino and Jana Compton were invited to present on groundwater nitrate at SSWR&rsquo;s Quarterly Research Area Coordination Team (RACT) meeting for the Nutrients topic SSWR.4 on June 5, &nbsp;2024.&nbsp; This meeting brings together the research coordinat...

Diatoms and soft algae have been collected by state monitoring programs across the United States to assess the biological condition of lotic and lentic water bodies. Some of the state programs have long-term records (i.e., decades) of algal taxonomic data. Over time, changes in l...

EPA is developing a regulation for perchlorate in drinking water. As part the regulatory process EPA must develop a Maximum Contaminant Level Goal (MCLG). FDA and EPA scientists developed a biologically based dose-response (BBDR) model to assist in deriving the MCLG. This mode...