http://www.legislation.gov.uk/id/nisr/2015/365/schedule/7

SCHEDULE 7Requirements for water bottled and labelled as “spring water” and bottled drinking water including prescribed concentrations or values of parameters

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Amendments (Textual)

Table C: Indicator Parameters

Item	Parameter	Units of Measurement	Maximum Concentration or Value
1.	Aluminium	µg/l	200
2.	Ammonium	mg/l	0.50
3.	Chloride	mg/l	250¹
4.	Clostridium perfringens (including spores)	number/100ml	0²
5.	Colour	F1Acceptable to consumers and no abnormal change	F2. . .
6.	Conductivity	µS cm^-1 at 20°C	2500¹
7.	Hydrogen ion concentration	pH units	4.5 (minimum) 9.5 (maximum)¹
8.	Iron	µg/l	200
9.	Manganese	µg/l	50
10.	Odour	F3Acceptable to consumers and no abnormal change	F4. . .
11.	Oxidisability	mg/l O₂	5³
12.	Sulphate	mg/l	250¹
13.	Sodium	mg/l	200
14.	Taste	F5Acceptable to consumers and no abnormal change	F6. . .
15.	Colony Count 22°	No abnormal change
16.	Coliform bacteria	number/250ml	0
17.	Total Organic Carbon	No abnormal change	⁴
18.	Turbidity	Acceptable to consumers and no abnormal change
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.