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. | |||
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 |
Textual Amendments
F1Words in Sch. 7 Pt. 3 substituted (27.10.2017) by The Natural Mineral Water, Spring Water and Bottled Drinking Water (Amendment) Regulations (Northern Ireland) 2017 (S.R. 2017/201), regs. 1, 10(a)(i)
F2Word in Sch. 7 Pt. 3 omitted (27.10.2017) by virtue of The Natural Mineral Water, Spring Water and Bottled Drinking Water (Amendment) Regulations (Northern Ireland) 2017 (S.R. 2017/201), regs. 1, 10(a)(ii)
F3Words in Sch. 7 Pt. 3 substituted (27.10.2017) by The Natural Mineral Water, Spring Water and Bottled Drinking Water (Amendment) Regulations (Northern Ireland) 2017 (S.R. 2017/201), regs. 1, 10(b)(i)
F4Words in Sch. 7 Pt. 3 omitted (27.10.2017) by virtue of The Natural Mineral Water, Spring Water and Bottled Drinking Water (Amendment) Regulations (Northern Ireland) 2017 (S.R. 2017/201), regs. 1, 10(b)(ii)
F5Words in Sch. 7 Pt. 3 substituted (27.10.2017) by The Natural Mineral Water, Spring Water and Bottled Drinking Water (Amendment) Regulations (Northern Ireland) 2017 (S.R. 2017/201), regs. 1, 10(c)(i)
F6Words in Sch. 7 Pt. 3 omitted (27.10.2017) by virtue of The Natural Mineral Water, Spring Water and Bottled Drinking Water (Amendment) Regulations (Northern Ireland) 2017 (S.R. 2017/201), regs. 1, 10(c)(ii)