Regulations 4, 9 and 11
Prescribed concentrations or values
Textual Amendments
F1Words in Sch. 1 Pt. 1 substituted (11.7.2018) by The Private Water Supplies (England) (Amendment) Regulations 2018 (S.I. 2018/707), regs. 1(1), 2(9)(a)(ii) (with reg. 3)
F2Words in Sch. 1 Pt. 1 omitted (11.7.2018) by virtue of The Private Water Supplies (England) (Amendment) Regulations 2018 (S.I. 2018/707), regs. 1(1), 2(9)(a)(i) (with reg. 3)
Part I: Directive requirements - prescribed concentration or values
1 The parametric value refers to the residual monomer concentration in the water as calculated according to specifications of the maximum release from the corresponding polymer in contact with the water. This is controlled by product specification. | ||
2 See also the nitrate-nitrite formula in regulation 4(c). | ||
3 For these purposes, “pesticides” means— For these purposes, “pesticides” means—
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4 “Pesticides total” means the sum of the concentrations of the individual pesticides detected and quantified in the monitoring process. | ||
5 The specified compounds are—
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6 The parametric value applies to the sum of the concentrations of the individual compounds detected and quantified in the monitoring process. | ||
7 The specified compounds are—
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| Parameters | Maximum concentration or value | Units of measurement |
|---|---|---|
| Acrylamide1 | 0.10 | μg/l |
| Antimony | 5.0 | μg/l |
| Arsenic | 10 | μg/l |
| Benzene | 1.0 | μg/l |
| Benzo(a)pyrene | 0.010 | μg/l |
| Boron | 1.0 | mg/l |
| Bromate | 10 | μg/l |
| Cadmium | 5.0 | μg/l |
| Chromium | 50 | μg/l |
| Copper | 2.0 | mg/l |
| Cyanide | 50 | μg/l |
| 1, 2 dichloroethane | 3.0 | μg/l |
| Epichlorohydrin1 | 0.10 | μg/l |
| Fluoride | 1.5 | mg/l |
| Lead | 10 | μg/l |
| Mercury | 1.0 | μg/l |
| Nickel | 20 | μg/l |
| Nitrate2 | 50 | mg/l |
| Nitrite2 | 0.5 (or 0.1 in the case of treatment works) | mg/l |
| Pesticides3— | ||
| Aldrin | 0.030 | μg/l |
| Dieldrin | 0.030 | μg/l |
| Heptachlor | 0.030 | μg/l |
| Heptachlor epoxide | 0.030 | μg/l |
| Other pesticides | 0.10 | μg/l |
| Pesticides total4 | 0.50 | μg/l |
| Polycyclic aromatic hydrocarbons5 | 0.10 | μg/l |
| Selenium | 10 | μg/l |
| Tetrachloroethene and Trichloroethene6 | 10 | μg/l |
| Trihalomethanes: Total7 | 100 | μg/l |
| Vinyl chloride1 | 0.50 | μg/l |
| Part II: National requirements – prescribed concentrations or values | ||
| Parameters | Maximum concentration or value | Units of measurement |
| Aluminium | 200 | μg/l |
| Colour | 20 | mg/l Pt/Co |
| Iron | 200 | μg/l |
| Manganese | 50 | μg/l |
| Odour | Acceptable to consumers and no abnormal change | |
| Sodium | 200 | mg/l |
| Taste | Acceptable to consumers and no abnormal change | |
| Tetrachloromethane | 3 | μg/l |
| Turbidity | 4 | NTU |
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) |
| F3. . . | F4. . . | |
| Colony counts | No abnormal change | Number/ml at [F522°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
F3Words 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)
F4Words 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)
F5Word 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)
1 Where treatment to reduce the level of radionuclides in water intended for human consumption has been taken, monitoring must be carried out under Part 1 of Schedule 2 to ensure the continued efficacy of the treatment. | ||
2 Enforcement action by a local authority is deemed justified on radiological protection grounds without further consideration where randon concentrates exceed 1,000 Bq/1. | ||
3 If tritium concentration exceeds its parametric value, an investigation (which may include analysis) of the presence of artificial radionuclides must be carried out. | ||
| Parameters | Maximum concentration or value or state (unless otherwise stated) | Units of measurements |
|---|---|---|
| Indicative dose (for radioactivity1 | 0.10 | mSv |
| Gross alpha | 0.1 | Bq/1 |
| Gross beta | 1.0 | Bq/1 |
| Radon2 | 100 | Bq/1 |
| Tritium (for radioactivity)3 | 100 | Bq/1 |