PART 2U.K.Indicator parameters (excluding radioactive substances)
Table C
Prescribed concentrations, values or states
1 The water should not be aggressive. | ||
2 Only in the case of surface water or groundwater that has been influenced by surface water. | ||
| Parameters | Maximum concentration or value or state (unless otherwise stated) | Units of measurement |
|---|---|---|
| Ammonium | 0.50 | mg/l |
| Chloride1 | 250 | mg/l |
| Clostridium perfringens (including spores) | 0 | Number/100ml |
| Number/100ml (Number/250 | ||
| Coliform bacteria | 0 | ml in the case of water put into bottles of containers) |
| F1. . . | F2. . . | |
| Colony counts | No abnormal change | Number/ml at [F322°C] |
| Conductivity1 | 2500 | μS/cm at 20°C |
| Hydrogen ion | 9.5 (maximum) | pH value |
| 6.5 (minimum) (in the case of | ||
| still water put into bottles or containers the minimum is 4.5) | pH value | |
| Sulphate1 | 250 | mg/l |
| Total organic carbon (TOC) | No abnormal change | mgC/l |
| Turbidity2 | 1 | NTU |
Textual Amendments
F1Words in Sch. 1 Pt. 2 omitted (11.7.2018) by virtue of The Private Water Supplies (England) (Amendment) Regulations 2018 (S.I. 2018/707), regs. 1(1), 2(9)(b)(i)(aa) (with reg. 3)
F2Words in Sch. 1 Pt. 2 omitted (11.7.2018) by virtue of The Private Water Supplies (England) (Amendment) Regulations 2018 (S.I. 2018/707), regs. 1(1), 2(9)(b)(i)(bb) (with reg. 3)
F3Word in Sch. 1 Pt. 2 substituted (11.7.2018) by The Private Water Supplies (England) (Amendment) Regulations 2018 (S.I. 2018/707), regs. 1(1), 2(9)(b)(ii) (with reg. 3)