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Records 26 to 50 of 9149

Comparison of DNA-based Detection Methods for Wild Pigs in the San Juan Bay Estuary Area
(PRESENTATION) [Presented : Jun 17, 2024]
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...
EPA-ORD’s Lead Service Line Technical Assistance Projects
(PRESENTATION) [Presented : Apr 12, 2024]
To present to the PTF Lead (Pb) SubCommitttee regarding EPA/ORD's Lead Service Line Identification technical assistance effort.
A fecal score approximation model for analysis of real-time quantitative PCR fecal source identification measurements
(JOURNAL) [Published : May 15, 2024]
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...
Climate and western fires: EPA research on smoke and water quality
(PRESENTATION) [Presented : May 22, 2024]
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...
ORD Service Area Dataset
(PRESENTATION) [Presented : May 02, 2024]
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.
VELMA model green infrastructure applications for reducing 6PPD-quinone concentrations in Puget Sound urban streams
(PRESENTATION) [Presented : Jun 12, 2024]
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...
What can long-term monitoring data tell us about the influence of wildfire on stream habitat in the Pacific Northwest?
(PRESENTATION) [Presented : Jun 06, 2024]
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...
Patterns and Predictions of Drinking Water Nitrate and Nutrient Inventories across the Contiguous U.S. - USDA-NRCS presentation
(PRESENTATION) [Presented : May 22, 2024]
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 interactive effects of diluted bitumen and UV on juvenile fathead minnows from the IISD-ELA Freshwater Oil Spill Remediation Study (FOReSt)
(PRESENTATION) [Presented : Nov 07, 2019]
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...
What is the impact of Light on Ocean Primary Production and Hypoxia?
(JOURNAL) [Published : Aug 01, 2018]
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...
Assessment of ecosystem services impacts from urbanization
(PRESENTATION) [Presented : Dec 06, 2018]
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 ...
Socio-economic criteria for preventing and controlling phosphorus pollution from municipal wastewater effluents
(PRESENTATION) [Presented : Jun 29, 2023]
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...
Lake Michigan 2020 Report (Pages 150-167, Lake Michigan CSMI Lower Food Web Survey Data Summary)
(PUBLISHED REPORT) [Published : Jan 01, 2024]
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...
High-frequency Dissolved Oxygen Dynamics in an Urban Estuary, the Long Island Sound
(JOURNAL) [Published : Mar 01, 2024]
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,...
Review and Recommendations for Slow the Flow Practices in Wisconsin’s Lake Superior Basin
(PUBLISHED REPORT) [Published : Oct 01, 2022]
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...
PFAS mixtures – Evaluation of dose additivity from combined exposure to multiple PFAS during pregnancy in a laboratory rat model - EPA PFAS Science Call
(PRESENTATION) [Presented : Apr 29, 2024]
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.  Effects common across all compounds included reduced pup and maternal bodyweights, reduced p...
MATERIALS SUPPORTING THE NEW RECREATIONAL WATER QUALITY CRITERIA FOR PATHOGENS
(PUBLISHED REPORT) [Published : Nov 19, 2012]
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...
Effect of nutrient reductions on dissolved oxygen and pH: a case study of Narragansett Bay
(JOURNAL) [Published : May 23, 2024]
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 ...
Effects of lake water-level alteration on physical habitat and biological assemblages
(PRESENTATION) [Presented : Jun 07, 2024]
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 Untapped World of Tap Water Contamination … so many more chemicals than we thought
(PRESENTATION) [Presented : May 14, 2024]
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 (...
PFAS Treatment Strategies: Challenges and Solutions
(PRESENTATION) [Presented : Feb 24, 2023]
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, cosmetics, water- and fire-resistan...
Differences in the Inactivation of Legionella pneumophila Serogroups Using UV-C LED Technology in Drinking Water
(PRESENTATION) [Presented : Jun 08, 2021]
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 ...
Male-specific coliphage: fecal source identification in an urban watershed
(PRESENTATION) [Presented : May 16, 2019]
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...
Laying a foundation for NTA at EPA: Expanding adoption, utility, and confidence
(PRESENTATION) [Presented : May 07, 2024]
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...
How to Identify Lead Free Certification Marks for Pipes, Fittings, Fixtures, Solder, and Flux Used for Drinking Water
(SUMMARY) [Published : Jun 11, 2024]
On September 1, 2020, EPA published the final regulation, Use of Lead Free Pipes, Fittings, Fixtures, Solder, and Flux for Drinking Water. EPA made  the conforming changes to existing regulations based on the Reduction  of Lead in Drinking Water Act of 2011 and the Comm...