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With increasing concerns about freshwater cyanobacteria blooms, there is a need to identify which waterbodies are at risk for developing these blooms, especially those that produce cyanotoxins. To address this concern, we developed spatial statistical models using the US National...

This presentation will review the latest research on inputs, budgets, effects, legacies and management related to non-point source nutrient pollution.  Using examples of nitrogen and phosphorus budgets at the national, regional and local scales, Jana Compton from EPA’s...

Wetland restoration and construction are important land management options for retaining nitrogen and phosphorus and thereby improving water quality at local scales (i.e., at nearby streams). However, limited information exists regarding the cumulative influence of wetlands outsi...

Agricultural best management practices/conservation practices (ag BMPs/ACPs) have been widely implemented for nonpoint source pollution control. However, through a Region 10 R2P2 project, we have identified two critical knowledge gaps that limit broader adoption of ACPs in the Pa...

For decades, researchers have sought to document injustices, highlight activism, and identify pathways in moving toward environmental justice (EJ). EJ research regarding water has been predominantly focused on drinking water. This project sought to identify and analyze the breadt...

This is a public presentation on the potential effects of nutrients in smoke on downwind cyanobacteria blooms. Wildfire activity is increasing in the continental U.S. and can be linked to climate change effects, including rising temperatures and more frequent drought conditions. ...

While SWMM has arguably played a pivotal role in pollution control in collection systems since its introduction, traditional applications using the model have been relatively static. They typically involve calibrating and validating SWMM models with data collected and curated for...

Protein processing operations include animal slaughtering, meat and poultry product production, and/or rendering of byproducts. These facilities utilize large volumes of water for hair/hide/feather removal, carcass washing, chilling, trimming and cutting, cooking, and cleaning/sa...

Poster presentation to the PFAS Research Workshop "Science for a Changing World", hosted by Office of Research and Development (ORD) Office of the Science Advisor, Policy, and Engagement (OSAPE) and Center for Environmental Solutions and Emergency Response (CESER) ...

Bench top and pilot lead corrosion studies are gaining more interest, considering revisions and upcoming improvements to the Lead and Copper Rule. This literature review identified studies ranging from simpler month(s)-long bench top dump-and-fill stagnant water tests (coupon tes...

Modeling Water Age in Premise Plumbing Systems

Onsite non-potable water systems (ONWS) collect and treat local source waters for non-potable end uses such as toilet flushing and irrigation. Quantitative microbial risk assessment (QMRA) has been used to set pathogen log10-reduction targets (LRTs) for ONWS to achieve the risk b...

White paper.

With the declining tailpipe emissions from the US and worldwide motor vehicle fleet, impacts of tire and brake wear are an increasingly important area of interest.  Recent research has shown the compound 6PPD used in tires as an anti-degradation chemical reacts with ozone to...

Anthropogenic disturbances have increased the frequency, area, and intensity of eutrophic events in coastal ecosystems, harming seagrass and macrofauna. The Pawcatuck River and Little Narragansett Bay (CT/RI) is a small, shallow estuary with zones of hypoxia due to algal growth. ...

Seagrass meadows and oyster beds are important coastal systems that provide many benefits. When these habitats are located near each other, benefits may include improved water quality and increased carbon storage. In two RI salt ponds, habitat zones sampled included eelgrass beds...

In April 2023, the IRIS Program released the draft IRIS Toxicological Review of Perfluorodecanoic Acid (PFDA) and Related Salts for public comment and external peer review. The IRIS assessment of PFDA will undergo an independent external scientific peer review managed by ERG, a c...

This sub-product provides an overview on our work with novel technologies to separate and destroy PFAS in residual waste streams (e.g., incinerator scrubber water, reverse osmosis retentate). This presentation focuses on a stepwise process where adsorbents first separate PFAS and...

Radioactive fallout could have debilitating effects on drinking water and wastewater systems. At least some drinking water system operators have plans to mitigate the effects of a contaminated water source, but most, if not all, wastewater operators have no such plans.  Both...

Legionella pneumophila (Lp) is an opportunistic drinking water pathogen that can cause infections through the inhalation of Lp-containing aerosols. Lp can occur in premise plumbing systems as these systems often have low disinfection residual, high surface area-to-volume ratios, ...

The development of science-based restoration goals that reflect the primary motivation of stakeholders is a key factor leading to large-scale, long-term restoration successes. The ability to predict the potential ecosystem service delivery from restoration can inform the setting ...

This research investigated the in-situ decay rates of four human wastewater-associated markers (Bacteroides HF183 (HF183), Lechnospiraceae Lachno3 (Lachno3), cross-assembling phage (crAssphage), pepper mild mottle virus (PMMoV) and three enteric viruses (human aden...

Trimethylbenzene (TMB; CAS 25551-13-7) is a commercially available mixture of three individual isomers: 1,2,4-, 1,2,3-, and 1,3,5-TMB. TMB isomers are produced during petroleum refining. TMB exposure in humans occurs primarily through inhalation, although ingestion of TMB isomers...

This study investigated the decay rates of wastewater-associated markers and enteric viruses in laboratory microcosms mimicking estuarine water environments in temperate Sydney, NSW, Australia using qPCR and RT-qPCR assays. The results demonstrated the reduction in concentrations...

Stable isotope ratios integrate, indicate, record, and trace fundamental processes in hydrology and ecology.  Stored within the atoms of samples, stable isotope ratios of specific elements unlock stories about ecological processes that impact water quality and quantity.&nbsp...