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The Surface Waters (Dangerous Substances) (Classification) Regulations 1989

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Regulation 3(1)

SCHEDULE 1CLASSIFICATION OF INLAND WATERS (DS1)

(1)(2)
SubstanceConcentration in microgrammes per litre (annual mean)
Aldrin, Dieldrin, Endrin and Isodrin

(i)0·03 for the four substances in total;

(ii)0·005 for endrin

Cadmium and its compounds5 (total cadmium: both soluble and insoluble forms)
Carbon tetrachloride12
Chloroform12
DDT (all isomers)0·025
para-para-DDT0·01
Hexachlorobenzene0·03
Hexachlorobutadiene0·1
Hexachlorocyclohexane (all isomers)0·1
Mercury and its compounds1 (total mercury: both soluble and insoluble forms)
Pentachlorophenol and its compounds2

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