environment agency pollution inventory data report trends and analysis 1998 2001 77 3 emissions to controlled waters & sewer introduction this chapter examines the of 15 substances sea river estuary from regulated processes between provides explanation context for these where possible included in are listed shown box 1 below substance considered arsenic 2 benzene cadmium 4 chloroform trichloromethane 5 chromium 6 copper 7 ethylene dichloride dichloroethane 8 lead 9 mercury 10 naphthalene 11 nickel 12 nonylphenols 13 octylphenols 14 tributyltin tbt compounds zinc as detailed main drivers including within summary council directive 2000 60 ec 23 october establishing a framework community action field water policy eu convention protection marine north east atlantic ospar september 1992 surface dangerous classification regulations 1989 1997 each following is provided period