A chemical added to rubber tires to make them safer for drivers but that pose a hazard to certain fish has surfaced widely in the Delaware River watershed, according to a researcher. The findings, presented by Jeremy Conkle, a senior chemist and toxicologist with the Delaware River Basin Commission, offered a mixed outlook: On the… The post Tire particles chemical harmful to fish prevalent in Delaware River Basin but largely at low levels, researcher says appeared first on Delaware Currents.