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From 2018 to 2024 surface waters (fresh and brackish), groundwater, and stormwater (runoff, re-use) samples were collected from sites with varying landuse (agricultural, forested, and urban) and streamflow conditions and analyzed at the Organic Geochemistry Research Laboratory in Lawrence, Kansas for the tire antioxidant 6PPD (6-p-phenylenediamine; N-(1,3-Dimethylbutyl)-N’-phenyl-p-phenylenediamine) and ozonated transformation product 6PPD-quinone (6PPD-Q, 2-((4-Methylpentan-2-yl)amino)-5-(phenylamino)cyclohexa-2,5-diene-1,4-dione)). There were 78 urban sampling sites in Colorado (N=15), Connecticut (N=1), Georgia (N=1), Hawaii (N=22), Kansas (N=7), Michigan (N=1), Minnesota (N=1), North Carolina (N=1), Oklahoma...
    map background search result map search result map Concentrations of 6PPD and 6PPD-Quinone in a United States reconnaissance of stormwater, surface water, and groundwater, 2018-24 Concentrations of 6PPD and 6PPD-Quinone in a United States reconnaissance of stormwater, surface water, and groundwater, 2018-24