S.L. 549.21 Art. 14Language of Annexes. Definition Category A1 Simple Category A2 Normal chlorination, chlorination). Category A3 Intensive e.g. adsorption 1 pH 2 (after filtration) 3 Total solids 4 5 6 Odour 7* Nitrates 8(1) Fluorides 9 Total organic 10* Dissolved 11* 12 Copper 13 Zinc 14 Boron 15 Beryllium 16 Cobalt

Annexes I and II to these regulations are being published in the English language with the English text of these regulations. ANNEX I

of the standard methods of treatment for transforming surface water of categories A1, A2 and A3 into drinking water physical treatment and disinfection, e.g. rapid filtration and disinfection.

physical treatment, chemical treatment and disinfection, e.g. pre-coagulation, flocculation, decantation, filtration, disinfection (final physical and chemical treatment, extended treatment and disinfection chlorination to break-point, coagulation, flocculation, decantation, filtration, (activated carbon), disinfection (ozone, final chlorination).

ANNEX II Characteristics of surface water intended for the abstraction of drinking water

Parameters A1 A1 A2 A2 A3 A3 G I G I G I 6·5 to 5·5 to 9 5·5 to 9 8·3 Coloration mg/l Pt scale 10 20 (O) 50 100 (O) 50 200 simple (O)

suspended mg/l 55 25

Temperature ºC 22 25 (O) 22 25 (O) 22 25 (O) s/cm-1 Conductivity at 20ºC 1 000 1 000 1 000 (dilution factor 3 10 20 at 25ºC) mg/l NO 25 50 (O) 50 (O) 50 (O) 3 mg/l F 0·7 to 1 1·5 0·7 to 1 0·7 to 1 mg/l Cl extractable chlorine iron mg/l Fe 0·1 0·3 1 2 1 Manganese mg/l Mn 0·05 0·1 1 mg/l Cu 0·02 0·05 0·05 1 (O) mg/l Zn 0·5 3 1 5 1 5 mg/l B 1 1 1 mg/l Be mg/l Co mg/l Ni mg/l V mg/l As 0·01 0·05 0·05 0·05 0·1 Parameters A1 A1 A2 A2 G I G I 20 Cadmium mg/l Cd 0·001 0·005 0·001 0·005 21 Total chromium mg/l Cr 0·05 0·05 22 Lead mg/l Pb 0·05 0·05 23 Selenium mg/l Se 0·01 0·01 24 Mercury mg/l Hg 0·0005 0·001 0·0005 0·001 25 Barium mg/l Ba 0·1 1 26 Cyanide mg/l Cn 0·05 0·05 27 Sulphates mg/l SO 150 250 150 250 (O) 4

28 Chlorides mg/l Cl 200 200 29 Surfactants mg/l 0·2 0·2 (reacting with (laurylsulphate) methyl blue) 30(2) Phosphates mg/l P O 0·4 0·7 2 5 mg/l C H OH 31 Phenols (phenol 0·001 0·001 0·005 6 5 index) paranitraniline 4 aminoantipyrine 32 Dissolved or mg/l 0·05 0·2 emulsified hydrocarbons (after extraction by petroleum ether) 33 Polycyclic mg/l 0·0002 0·0002 aromatic hydrocarbons 34 Total pesticides mg/l 0·001 0·0025 (parathion, BHC, dieldrin) 35* Chcmical mg/l O 2 oxygen demand (COD) 36* Dissolved % O > 70 > 50 2 oxygen saturation rate 37* Biochemical mg/l O < 3 < 5 2 oxygen demand (BOD ) (at 20ºC 5 without nitrification) 38 Nitrogen by mg/l N 1 2 Kjeldahl method (except NO ) 3 39 Ammonia mg/l NH 0·05 1 1·5 4 40 Substances mg/l SEC 0·1 0·2 extractable with chloroform 41 Total organic mg/l C carbon Parameters A1 A1 A2 A2 A3 A3 G I G I G I mg/l C carbon flocculation and membrane  (5 )

coliforms /100 ml 50 5 000 50 000

coliforms /100 ml 20 2 000 20 000 /100 ml 20 1 000 10 000 streptococci Salmonella Not Not present present in in 5 000 ml 5 000 ml climatic or geographical conditions. 9(d). given are upper limits set in relation to the mean annual temperature (high and low). parameter has been included to satisfy the eclogical requirements of certain types of