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The Surface Waters (Abstraction for Drinking Water) (Classification) (Scotland) Regulations 1996

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Regulation 2


The limits set out below are maxima

No in Annex II to the 1975 DirectiveParametersDW1DW2DW3

See regulation 7(1)(b)


See regulation 7(1)(d)

2Colouration (after simple filtration)mg/1 Pt Scale20(0)100(0)200(0)
7*Nitratesmg/1 NO350(0)50(0)50(0)
8Fluoridesmg/1 F1.5
10*Dissolved ironmg/1 Fe0.32
12Coppermg/1 Cu0.05(0)
13Zincmg/1 Zn355
19Arsenicmg/1 As0.050.050.1
20Cadmiummg/1 Cd0.0050.0050.005
21Total Chromiummg/1 Cr0.050.050.05
22Leadmg/1 Pb0.050.050.05
23Seleniummg/1 Se0.010.010.01
24Mercurymg/1 Hg0.0010.0010.001
25Bariummg/1 Ba0.111
26Cyanidemg/1 CN0.050.050.05
27Sulphatesmg/1 SO4250250(0)250(0)
31Phenols (phenol index) paranitroaniline 4-aminoantipyrinemg/1 C6H5OH0.0010.0050.1
32Dissolved or emulsified hydro carbons (after extraction by petroleum ether)mg/10.050.21
33Polycyclic aro matic hydrocar bonsmg/10.00020.00020.001
34Total pesticides (parathion, hexachlorocyclohexane, dieldrin)mg/10.0010.00250.005
39Ammoniamg/1 NH41.54(0)

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