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Tire wear is a significant contributor to near-road ambient air pollution, particularly in urban areas. Recently, attention has been directed to the tire tread chemical N-phenyl-N′-(1,3-dimethylbutyl)-p-phenylenediamine (6PPD), an anti-ozone agent, and its chemical byp...

We have been invited by Keith Bollt (bollt.keith@epa.gov) of the Chesapeake Bay Program Office to present our work on 6PPD-Q to the Chesapeake Bay Toxic Contaminants Workgroup monthly meeting on June 10.  My ORISE Fellow, Ashley Dann will give a ppt presentation showing data...

EPA’s Freshwater Explorer is an easy-to-use, interactive web-based mapping tool for exploring freshwater data from streams, lakes, and groundwater wells in all 50 U.S. states, Puerto Rico, and the U.S. Virgin Islands. It includes both observed data points and estimated back...

EPA’s Freshwater Explorer is an easy-to-use, interactive web-based mapping tool for exploring freshwater data from streams, lakes, and groundwater wells in all 50 U.S. states, Puerto Rico, and the U.S. Virgin Islands. It includes both observed data points and estimated background...

Coho salmon (Oncorhynchus kisutch) are highly sensitive to 6PPD-Quinone (6PPD-Q). Details of the hydrological and biogeochemical processes controlling spatial and temporal dynamics of 6PPD-Q fate and transport from points of deposition to receiving waters (e.g., streams, estuarie...

EPA’s Freshwater Explorer is an easy-to-use, interactive web-based mapping tool for exploring freshwater data from streams, lakes, and groundwater wells in all 50 U.S. states, Puerto Rico, and the U.S. Virgin Islands. It includes both observed data points and estimated back...

EPA's Freshwater Explorer  (Version 2.0; https://www.epa.gov/water-research/freshwater-explorer) is an interactive web-based mapping tool for water quality parameters of freshwater streams, lakes, and groundwater wells in all 50 U.S. states, Puerto Rico, and the U.S. Virgin ...

6PPD (N1-(4-methylpentan-2-yl)-N4-phenylbenzene-1,4-diamine), a widely used rubber antioxidant in tire manufacturing, has garnered increasing global attention, following the discovery that its ozone-oxidation product, 6PPD-q, is the primary toxicant responsible for urban runoff m...

This presentation is an overview of recent 6PPD/6PPD-quinone research at EPA as part of a Tools and Resources Webinar featuring presentations by the Interstate Technology & Regulatory Council (ITRC) 6PPD Team. 6PPD-quinone is a contaminant of emerging concern and is a tr...

This slide deck is meant to encompass possible conversation on methodological development on near road high-volume particulate sampling and subsequent analysis via thermal-desorption gas chromatography mass spectrometry and early insights from results of sampling campaign in and ...

Although less sensitive than coho salmon, brook trout fry are sensitive to 6PPD-quinone (6PPDQ) (24-hr median lethal concentration that causes death in 50% of the population (LC50) 0.2 µg/L 6PPDQ). Concentrations have been measured in American streams exceeding that ...

EPA's Freshwater Explorer is an interactive web-based mapping tool for water quality parameters of freshwater streams, lakes, and groundwater wells in all 50 U.S. states, Puerto Rico, and the U.S. Virgin Islands. The tool includes summary statistics for observed levels for approx...

EPA's Freshwater Explorer is an interactive web-based mapping tool for water quality parameters of freshwater streams, lakes, and groundwater wells in all 50 U.S. states, Puerto Rico, and the U.S. Virgin Islands. The tool includes summary statistics for observed levels for approx...

EPA's Freshwater Explorer is an interactive web-based mapping tool for water quality parameters of freshwater streams, lakes, and groundwater wells in all 50 U.S. states, Puerto Rico, and the U.S. Virgin Islands. The tool includes summary statistics for observed levels for approx...

6PPD-quinone, a degradation product of the rubber antiozonant 6PPD that is frequently added to tires, has previously been identified as a causative agent of urban runoff mortality syndrome in salmonids. Previous high-throughput phenotypic profiling (HTPP) studies using the Cell P...

EPA's Freshwater Explorer is an interactive web-based mapping tool for water quality parameters of freshwater streams, lakes, and groundwater wells in all 50 U.S. states, Puerto Rico, and the U.S. Virgin Islands. The tool includes summary statistics for observed levels for approx...

EPA's Freshwater Explorer is an interactive web-based mapping tool for water quality parameters of freshwater streams, lakes, and groundwater wells in all 50 U.S. states, Puerto Rico, and the U.S. Virgin Islands. The tool includes summary statistics for observed levels for approx...

This is an invited presentation to the City of Port Angeles, Washington about tire-related pollutants.  

6PPD-quinone (N-(1,3-dimethylbutyl)-N′-phenyl-p-phenylenediamine quinone), a transformation product of the antiozonant 6PPD (N-(1,3-dimethylbutyl)-N′-phenyl-p-phenylenediamine) is a likely causative agent of coho salmon (Oncorhynchus kisutch) pre-spawn mortality. Stormwater runof...

The Regional Monitoring Program for Water Quality in San Francisco Bay (RMP) uses a multi-faceted strategy for cost-effective emerging contaminant identification and monitoring prioritization to support management efforts. As part of this strategy, the RMP is adopting use of nove...

Background: In 2022, ATSDR conducted a biomonitoring study to supplement the pilot exposure measurement activities conducted as part of the U.S. Federal Research Action Plan on Recycled Tire Crumb Rubber Used on Playing Fields and Playgrounds. Methods: Participant recruitment too...

The goal of the research 

Tire wear particles and associated pollutants include microplastics, heavy metals, and exotic chemicals such as the antiozonant N-phenyl-N¿(1-3-dimethylbutyl)-p-phenylenediamine (6-PPD) whose transformation product 6-PPD-quinone (6-PPD-q) was discovered to have adverse eff...

A presentation to a state, municipal, academic, and Federal working group on method development for the detection and quantification of 6PPD and 6PPD-quinone. This presentation will be a short update on our efforts to develop a method for the detection and quantification of 6PPD ...

Research updates covering complex systems science for decision making and 6PPD-quinone research activities for the ORD meeting with the National Tribal Toxics Council (NTTC).