Next >>

During the past century, a vast number of organic chemicals have been manufactured and used in industrial, agricultural, public health, consumer products, and other applications. The widespread use in bulk quantities of halogenated organic chemicals (HOCs; also called as Organoha...

Drinking water nitrate contamination is a significant economic and public health concern in The Great Plains, with few tested best practices for improving source water quality. This project seeks to establish a monitoring framework for quantifying the benefits of soil health prac...

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 ...

Although the offshore water of Lake Michigan has been below the Great Lakes Water Quality Agreement (GLWQA) total phosphorus (TP) spring target concentration of 7 µg L−1 for several decades, higher TP concentrations occur in the nearshore, contributing to the res...

A coconut shell based (AC1230CX) and a bituminous coal based (F400) granular activated carbon (GAC) were ground with mortar and pestle (MP), a blender, and a bench-scale ball milling unit (BMU). For particle size reduction, the blender was the most time efficient method. Four siz...

Drinking water utilities are vulnerable to both human-caused and natural disasters that can impact the system infrastructure and the delivery of potable water to consumers. Resilience analysis can help utilities identify high-risk areas in their system and understand how to bette...

Premise Plumbing Modeling - Demonstrating effectiveness of new modeling for premise plumbing systems

EPA is peer reviewing the Agency’s report modeling the relationship between lead in drinking water and blood lead levels in children utilizing the Integrated Exposure Uptake Biokinetic (IEUBK) model. The report being peer reviewed may be used to inform the derivation of a concent...

The Adverse Outcome Pathway (AOP) framework has been adopted as means to assemble, organize, and integrate all available biological information to support sound regulatory decision making. Environmental chemicals can interfere with the thyroid system at numerous sites, and these ...

Nitrogen management in Long Island Sound (LIS) has reduced N loading and the extent of hypoxia over the last 2 decades. To support communication around successful remediation of hypoxia and the remaining challenges of N management, we are analyzing 30 years of water quality data ...

Onsite wastewater treatment systems are a major source of excess nutrients and co-pollutants in groundwater. The high density of septic systems in New England’s coastal watersheds has degraded the quality of drinking and recreational freshwater resources and led to collapse...

The etiology of bladder cancer among never smokers without occupational or environmental exposure to established urothelial carcinogens remains unclear. Urinary mutagenicity is an integrative measure that reflects recent exposure to genotoxic agents. Here, we investigated its pot...

The Regional Monitoring Networks (RMNs) are a collaborative, volunteer effort to collect comparable long-term monitoring data at targeted sites nationwide to detect changes over time. Six Northeast states have participated in the stream RMN since it was first piloted in the North...

Reduction of total phosphorus (TP) loads has long been a management focus of Chesapeake Bay restoration, but riverine monitoring stations have shown mixed temporal trends. To better understand the regional patterns and drivers of TP trends across the Bay watershed, we compiled an...

EPA-ORD-CPHEA's Michael Pennino and Jana Compton were invited to present on groundwater nitrate at the EPA Region 5 State Water Directors Meeting on May 15, 2024.  This meeting brings together EPA Region 5 state clean water and drinking water directors to discuss topics of c...

Background. Seroconversion to a pathogen-specific antibody is a marker of an incident infection with a specific pathogen. While self-reported symptoms can be affected by reporting bias, seroconversion is likely to be free of this bias as it is based on objective measurements of a...

This Subproduct is a slide deck for an invited presentation at the Georgetown University Center for PFAS and Cancer (CPAC) Joint Virtual Symposium.  Slide deck presents the results of our group's PFAS developmental toxicity mixture studies.  This work demonstrates the d...

Combustion of mixed materials during open air burning of refuse and housefires produces emissions that worsen air and water quality and cause adverse health effects. The purpose of this study was to assess the irritant potential of extractable organic material of smoke condensate...

This study characterized Bacillus globigii (BG) as a Bacillus anthracis Sterne (BAS) surrogate for wastewater treatment-related studies of UV inactivation, adsorption onto powdered activated carbon (PAC), and bioaerosol emission. The inactivation of BG was faster than that of BAS...

Harmful algal blooms (HABs) were a topic of great interest at the 2018 ASLO Summer Meeting in Victoria, B.C., Canada (Fig. 1). This was no surprise, since HABs may become – and already are in some areas – the greatest water quality threat to public health and aquatic ...

Protein processing operations utilize large volumes of water for hair/hide/feather removal, carcass washing, chilling, trimming and cutting, cooking, cleaning and sanitation, etc. The generated wastewater is typically treated onsite and discharged to municipal wastewater treatmen...

Kinetic models for the redox chemistry of disinfectant decay and toxic disinfection byproduct formation are essential to ensure water quality and protect public health; however, analytical limits have hindered model development. Proton transfer time of flight mass spectrometry (P...

Distribution system nitrification is an important issue for water utilities that use chloramines as a secondary disinfectant. This presentation reviews the causes of nitrification and how to monitor, prevent, and react to nitrification events. Furthermore, an update on research n...

EPA is developing approaches to inform the derivation of a Maximum Contaminant Level Goal (MCLG) for perchlorate in drinking water under the Safe Drinking Water Act. EPA previously conducted an independent, external, scientific peer review of the draft biologically-based dose-res...

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...