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The Drinking Water in Containers Regulations 1994

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PART II:PRESCRIBED CONCENTRATIONS OR VALUES

TABLE A

Column 1Column 2Column 3Column 4
ItemParametersUnits of MeasurementConcentration or Value (maximum unless otherwise stated)
Note
(i)

If silver is used in a water treatment process, 80 may be substituted for 10.

1.Colourmg/l Pt/Co scale20
2.Turbidity (including suspended solids)Formazin turbidity units4
3.Odour (including hydrogen sulphide)Dilution number3 at 25°C
4.TasteDilution number3 at 25°C
5.Temperature°C25
6.Sulphatemg SO4/l250
7.Magnesiummg Mg/150
8.Sodiummg Na/l150
9.Potassiummg K/112
10.Dry residuesmg/l1500(after drying at 180°C)
11.Nitratemg NO3/l50
12.Nitritemg NO2/l0.1
13.Ammonium (ammonia and ammonium ions)mg NH4/l0.5
14.Kjeldahl nitrogenmg N/l1
15.Oxidizability (permanganate value)mg O2/l5
16.Total organic carbonmg C/lNo significant increase over that normally observed
17.Dissolved or emulsified hydrocarbons (after extraction with petroleum ether); mineral oilsμg/l10
18.Phenolsμg C6H5OH/l0.5
19.Surfactantsμg/l (as lauryl sulphate)200
20.Aluminiumμg Al/l200
21.Ironμg Fe/l200
22.Manganeseμg Mn/l50
23.Copperμg Cu/l3000
24.Zincμg Zn/l5000
25.Phosphorusμg P/l2200
26.Fluorideμg F/l1500
27.Silverμg Ag/l10(i)

TABLE B

Column 1Column 2Column 3Column 4
ItemParametersUnits of MeasurementMaximum Concentration
Notes
(i)

The sum of the detected concentrations of individual substances.

(ii)

The sum of the detected concentrations of fluoranthene, benzo 3.4 fluoranthene, benzo 11.12 fluoranthene, benzo 3.4 pyrene, benzo 1.12 perylene and indeno (1,2,3—cd) pyrene.

1.Arsenicμg As/l50
2.Cadmiumμg Cd/l5
3.Cyanideμg CN/l50
4.Chromiumμg Cr/l50
5.Mercuryμg Hg/l1
6.Nickelμg Ni/l50
7.Leadμg Pb/l50
8.Antimonyμg Sb/l10
9.Seleniumμg Se/l10
10.Pesticides and related products:

(a)individual substances

μg/l0.1

(b)total substances(i)

μg/l0.5
11.Polycyclic aromatic hydrocarbons(ii)μg/l0.2

TABLE C

Column 1Column 2Column 3Column 4
ItemParametersUnits of MeasurementMaximum Concentration
Note
(i)

Analysis by multiple tube method.

(ii)

The total viable colony count should be measured within 12 hours of bottling with the sample water being kept at a constant temperature during that 12-hour period. Any increase in the total viable colony count of the water between 12 hours after bottling and the time of sale shall not be greater than that normally expected.

1.Total coliformsnumber/100 ml0
2.Faecal coliformsnumber/100 ml0
3.Faecal streptococcinumber/100 ml0
4.Sulphite-reducing clostridianumber/20 ml≤1(i)
5.Colony countsnumber/1 ml at 22°C100(ii)
number/1 ml at 37°C20(ii)

TABLE D

Column 1Column 2Column 3Column 4
ItemParametersUnits of MeasurementMaximum Concentration or Value
1.ConductivityμS/cm1500 at 20°C
2.Chloridemg Cl/l400
3.Calciummg Ca/l250
4.Substances extractable in chloroformmg/l dry residue1
5.Boronμg B/l2000
6.Bariumμg Ba/l1000
7.Benzo 3.4 pyreneng/l10
8.Tetrachloromethaneμg/l3
9.Trichloroetheneμg/l30
10.Tetrachloroetheneμg/l10

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