Presumptive sources and relative heat index of 6PPD-quinone at the NHDPlusV2 catchment scale across the conterminous U.S.

Geospatial datasets related to 6PPD-quinone, a compound intended to increase the life span of tires, were acquired and integrated into a relative heat index framework across the conterminous United States. 6PPD-quinone is known to be the cause of Coho Salmon kills following storm events, and more is being learned about the impacts it may have on other species. Sources and influential factors associated with this compound and the hazard it poses to fish include tire-related manufacturing and industry facilities, road densities and traffic, airports, imperviousness, and consecutive dry days. These characteristics among others were identified and given weights by a team of geographers, toxicologists, biologists, and chemists in an effort to best identify NHDPlus version 2 catchments with coincident network flowlines that could be most useful for sampling efforts. Non-network catchments were not included. This data release includes raw values of sources, ranked and weighted values of sources, and the final assigned relative heat index value of sources by NHDPlus version 2 catchment.