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Shallow continental shelves support productive pelagic and benthic communities. This study examined primary productivity at a shallow shelf region in the northeastern Gulf of Mexico focusing on the effect of light on water column and benthic productivity at water depths between 1...

This webinar was presented as part of the EPA-ORD Water Research webinar series on October 29, 2014. Dr. Tom Speth and Dr. Darren Lytle provided an overview of EPA’s small-system’s research and outreach efforts to communities, including topics like harmful algal blooms treatment,...

The ELISA assay is a potential tool to screen for dissolved or cell bound microcystins in drinking water treatment plant sludges.  In order to evaluate this potential more thoroughly, a series of experiments were performed to: (1) evaluate the impacts of storage times and te...

A financially and technically accessible method for screening powdered activated carbons for control of HAB toxins in water treatment.

Identification of potential pathogens that present risks to human health in recreational waters is necessary to advance in-depth water quality assessments. Despite the application of PCR techniques for environmental pathogen detection, only limited information is usually availabl...

The San Juan Bay Estuary (SJBE) is an interconnected system of streams, bays, lagoons, and canals located in a highly urbanized area in San Juan, Puerto Rico. Due to the rapid rate of urbanization, some communities across the SJBE have limited access to or are impacted by failure...

The U.S. Harmful Algal Bloom and Hypoxia Research Control Act calls for robust approaches to forecasting cyanobacterial harmful algal blooms (cyanoHABs). Accurate forecasting technology could save local communities healthcare costs through the early detection of cyanoHABs and the...

The ability to identify human sewage in environmental, municipal storm system drains, and other waste flows is important to protect public health and natural water resources.  A recent study reports the complete genome sequence of ΦB124-14, a bacteriophage capable of inf...

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

Ductile iron and copper coupons were aged 137–189 days and 2 days, respectively, with 2 mg Cl2·L–1 monochloramine under four water chemistries (pH 7 or 9 and 0 or 3 mg·L–1 orthophosphate). Subsequently, microelectrode profiles of monochloramine con...

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 ...

Communities across the United States and particularly in the Midwest continue to grapple with the complications associated with aging infrastructure. This includes the presence of lead (Pb)-bearing plumbing components such as lead service lines (LSLs), downstream galvanized iron ...

Chloraminated drinking water systems commonly implement a temporary free chlorine conversion (FCC) to control or minimize nitrification in the distribution system (DS), but unintended water quality changes may occur during the FCC, including increased disinfection byproducts (DBP...

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...

Wild pigs are an invasive species found globally that pose significant economic impact and a serious risk to local ecosystems, agriculture, and public health. Fecal contamination of water is one of these public health concerns as wild pigs have been shown to carry pathogenic ente...

To present to the PTF Lead (Pb) SubCommitttee regarding EPA/ORD's Lead Service Line Identification technical assistance effort.

Numerous qPCR-based methods are available to estimate the concentration of fecal pollution sources in surface waters. However, qPCR fecal source identification data sets often include a high proportion of non-detections (reactions failing to attain a prespecified minimal signal i...

Wildland fire smoke impacts millions of people in the United States every year. The EPA’s Office of Research and Development is addressing our increasingly smokey future with state-of-the-art instrumentation in a mobile air quality laboratory based at the PESD lab in Corval...

Presentation on ORD Service Area Boundaries for the EPA GIS Workshop Meeting, to be presented on May 1, 2024.  Presentation will showcase how CAISB is using advanced methods in spatial machine learning to understand which systems Americans source their water from.

This research builds upon successful StRAP 3 (Appendix B) and RARE project tests of ORD's VELMA ecohydrology model to identify urban GI solutions for reducing stormwater contaminant loads impacting ESA-listed salmonids in the Puget Sound National Estuary. For example, recent resu...

Long-term monitoring datasets provide valuable opportunities to identify aquatic ecosystem responses to disturbance at broad spatial extents. The Aquatic and Riparian Effectiveness Monitoring Program (AREMP) is unique in this regard because the program re-surveys the same 1411 st...

EPA-ORD-CPHEA's Michael Pennino, Jana Compton and Robert Sabo were invited to present on groundwater nitrate at joint meeting with USDA-NRCS on May 22, 2024.  This meeting brings together the USDA Agricultural Water Quality National Team together with US EPA scientists and s...

Potential environmental impacts of oil spills are a concern for the Canadian public and the oil industry. Optimizing methods to treat residual oil that remains after an oil spill cleanup and to assess the potential impacts of residual oil in impacted freshwater systems are both h...

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 ...