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The Natural Mineral Water, Spring Water and Bottled Drinking Water Regulations (Northern Ireland) 2015

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PART 3N.I.Parametric values for indicator parameters

Table C: Indicator Parameters

1 The water must not be aggressive.

2 Necessary only if the water originates from or is influenced by surface water.

3 This parameter need not be measured if the parameter Total Organic Carbon is analysed.

4 This parameter need not be measured for supplies of less than 10,000m3 a day.

ItemParameterUnits of MeasurementMaximum Concentration or Value
1.Aluminiumµg/l200
2.Ammoniummg/l0.50
3.Chloridemg/l2501
4.Clostridium perfringens (including spores)number/100ml02
5.Colour [F1Acceptable to consumers and no abnormal change]F2. . .
6.ConductivityµS cm-1 at 20°C25001
7.Hydrogen ion concentrationpH units

4.5 (minimum)

9.5 (maximum)1

8.Ironµg/l200
9.Manganeseµg/l50
10.Odour [F3Acceptable to consumers and no abnormal change]F4. . .
11.Oxidisabilitymg/l O253
12.Sulphatemg/l2501
13.Sodiummg/l200
14.Taste [F5Acceptable to consumers and no abnormal change]F6. . .
15.Colony Count 22°No abnormal change
16.Coliform bacterianumber/250ml0
17.Total Organic CarbonNo abnormal change4
18.Turbidity

Acceptable to consumers and no abnormal change

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