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The Private Water Supplies (England) Regulations 2016
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- UK Statutory Instruments
- 2016 No. 618
- SCHEDULE 1
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Regulations 4, 9 and 11
SCHEDULE 1Prescribed concentrations or values
This schedule has no associated Explanatory Memorandum
PART 1Wholesomeness
Table A
MICROBIOLOGICAL PARAMETERS
Prescribed concentrations or values
| Parameters | Maximum concentration or value | Units of measurement |
|---|---|---|
| Escherichia coli (E. coli) | 0 | Number/100ml |
| Enterococci | 0 | Number/100ml |
| In the case of water in bottles or containers: | ||
| Colony count 22°C | 100 | Number/ml |
| Colony count 37°C | 20 | Number/ml |
| Escherichia coli (E. coli) | 0 | Number/250ml |
| Enterococci | 0 | Number/250ml |
| Pseudomonas aeruginosa | 0 | Number/250ml |
Table B
CHEMICAL PARAMETERS
Part I: Directive requirements - prescribed concentration or values
| Parameters | Maximum concentration or value | Units of measurement |
|---|---|---|
(i) 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. | ||
(ii) See also the nitrate-nitrite formula in regulation 4(c). | ||
(iii) For these purposes, “pesticides” means—
| ||
(iv) “Pesticides total” means the sum of the concentrations of the individual pesticides detected and quantified in the monitoring process. | ||
(v) The specified compounds are—
The parametric value applies to the sum of the concentrations of the individual compounds detected and quantified in the monitoring process. | ||
(vi) The parametric value applies to the sum of the concentrations of the individual compounds detected and quantified in the monitoring process. | ||
(vii) The specified compounds are—
The parametric value applies to the sum of the concentrations of the individual compounds detected and quantified in the monitoring process. | ||
| Acrylamide(i) | 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 |
| Epichlorohydrin(i) | 0.10 | μg/l |
| Fluoride | 1.5 | mg/l |
| Lead | 10 | μg/l |
| Mercury | 1.0 | μg/l |
| Nickel | 20 | μg/l |
| Nitrate(ii) | 50 | mg/l |
| Nitrite(ii) | 0.5 (or 0.1 in the case of treatment works) | mg/l |
| Pesticides(iii)— | ||
| 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 total(iv) | 0.50 | μg/l |
| Polycyclic aromatic hydrocarbons(v) | 0.10 | μg/l |
| Selenium | 10 | μg/l |
| Tetrachloroethene and Trichloroethene(vi) | 10 | μg/l |
| Trihalomethanes: Total(vii) | 100 | μg/l |
| Vinyl chloride(i) | 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 |
PART 2Indicator parameters (excluding radioactive substances)
Table C
Prescribed concentrations, values or states
| Parameters | Maximum concentration or value or state (unless otherwise stated) | Units of measurement |
|---|---|---|
(i) The water should not be aggressive. | ||
(ii) Only in the case of surface water or groundwater that has been influenced by surface water. | ||
| Ammonium | 0.50 | mg/l |
| Chloride(i) | 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) |
| No abnormal change | Number/ml at 22° | |
| Colony counts | No abnormal change | Number/ml at 37°C |
| Conductivity(i) | 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 | |
| Sulphate(i) | 250 | mg/l |
| Total organic carbon (TOC) | No abnormal change | mgC/l |
| Turbidity(ii) | 1 | NTU |
PART 3Indicator parameters (radioactive substances)
Table D
Parametric values for indicative does, randon and tritium of water intended for human consumption
| Parameters | Maximum concentration or value or state (unless otherwise stated) | Units of measurements |
|---|---|---|
(i) 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. | ||
(ii) Enforcement action by a local authority is deemed justified on radiological protection grounds without further consideration where randon concentrates exceed 1,000 Bq/1. | ||
(iii) If tritium concentration exceeds its parametric value, an investigation (which may include analysis) of the presence of artificial radionuclides must be carried out. | ||
| Indicative dose (for radioactivity(i) | 0.10 | mSv |
| Gross alpha | 0.1 | Bq/1 |
| Gross beta | 1.0 | Bq/1 |
| Radon(ii) | 100 | Bq/1 |
| Tritium (for radioactivity)(iii) | 100 | Bq/1 |
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