Polychlorinated biphenyls (PCB's) in the rivers Avon and Frome.
On June 19, 1973 very high levels of Aroclor 1254 were determined in the River Avon and Frome. The source might have been cleaning of systems in factories which use them. The levels decreased with time. In fish from the River Avon three types of Aroclors were determined.
D000818:Animals; D003634:DDT / Q000032:analysis; D004026:Dieldrin / Q000032:analysis; D005399:Fishes / Q000378:metabolism; D005618:Fresh Water / Q000032:analysis; D001556:Hexachlorocyclohexane / Q000032:analysis; D011078:Polychlorinated Biphenyls / Q000032:analysis*; D006113:United Kingdom
D001556:Hexachlorocyclohexane; D003634:DDT; D011078:Polychlorinated Biphenyls; D004026:Dieldrin