- Y Diweddaraf sydd Ar Gael (Diwygiedig) - Saesneg
- Y Diweddaraf sydd Ar Gael (Diwygiedig) - Cymraeg
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- Gwreiddiol (Fel y'i Gwnaed) - Cymraeg
The Private Water Supplies (Wales) Regulations 2017
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Rhagor o Adnoddau
Changes to legislation:
There are currently no known outstanding effects for the The Private Water Supplies (Wales) Regulations 2017, SCHEDULE 1.
Changes to Legislation
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Regulations 2, 11, 12, 13, 18 and 19
SCHEDULE 1E+WConcentrations or Values
PART 1E+WWholesomeness
Commencement Information
I1Sch. 1 Pt. 1 in force at 20.11.2017, see reg. 1
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: | ||
| Escherichia coli (E.coli) | 0 | Number/250ml |
| Enterococci | Number/250ml | |
| Pseudomonas aeruginosa | 0 | Number/250ml |
| Colony count 22ºC | 100 | Number/ml |
TABLE B:
CHEMICAL PARAMETERS
Prescribed concentrations or values Parameters | Maximum concentration or value | Units of Measurement | |
|---|---|---|---|
(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(1)(c). | |||
(3) For these purposes “Pesticides” means:
| |||
(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:
The parametric value applies to the sum of the concentrations of the individual compounds detected and quantified in the monitoring process. | |||
| The parametric value applies to the sum of the concentrations of the individual compounds detected and quantified in the monitoring process. | |||
(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:
The parametric value applies to the sum of the concentrations of the individual compounds detected and quantified in the monitoring process. | |||
| The parametric value applies to the sum of the concentrations of the individual compounds detected and quantified in the monitoring process. | |||
| Acrylamide (1) | 0.10 | µg/1 | |
| Antimony | 5.0 | µg/1 | |
| Arsenic | 10 | µg/1 | |
| Benzene | 1.0 | µg/1 | |
| Benzo(a)pyrene | 0.010 | µg/1 | |
| Boron | 1.0 | mg/1 | |
| Bromate | 10 | µg/1 | |
| Cadmium | 5.0 | µg/1 | |
| Chromium | 50 | µg/1 | |
| Copper | 2.0 | mg/1 | |
| Cyanide | 50 | µg/1 | |
| 1.2 dichloroethane | 3.0 | µg/1 | |
| Epichlorohydrin(1) | 0.10 | µg/1 | |
| Fluoride | 1.5 | mg/1 | |
| Lead | 10 | µg/1 µg/1 | |
| Mercury | 1.0 | µg/1 | |
| Nickel | 20 | µg/1 | |
| Nitrate (2) | 50 | mg/l | |
| Nitrite (2) | 0.5 (or 0.1 in the case of treatment works) | mg/l | |
| Pesticides (3)— | Aldrin | 0.030 | µg/1 |
| Dieldrin | 0.030 | µg/1 | |
| Heptachlor | 0.030 | µg/1 | |
| Heptachlor epoxide | 0.030 | µg/1 | |
| Other pesticides | 0.10 | µg/1 | |
| Pesticides total (4) | 0.50 | µg/1 | |
| Polycyclic aromatic hydrocarbons (5) | 0.10 | µg/1 | |
| Selenium | 10 | µg/1 | |
| Tetrachloroethene and Trichloroethene(6) | 10 | µg/1 | |
| Trihalomethanes: Total(7) | 100 | µg/1 | |
| Vinyl chloride(1) | 0.50 | µg/1 | |
National requirements – Prescribed concentrations or values
Parameters | Maximum concentration or value | Units of Measurement |
|---|---|---|
| Aluminium | 200 | µg/1 |
| Colour | 20 | mg/l Pt/Co |
| Iron | 200 | µg/1 |
| Manganese | 50 | µg/1 |
| Odour | Acceptable to consumers and no abnormal change | |
| Sodium | 200 | mg/l |
| Taste | Acceptable to consumers and no abnormal change | |
| Tetrachloromethane | 3 | µg/1 |
| Turbidity | 4 | NTU |
PART 2E+WIndicator Parameters
Commencement Information
I2Sch. 1 Pt. 2 in force at 20.11.2017, see reg. 1
TABLE C:
Prescribed concentrations, values or states
Parameters | Maximum concentration or value | Units of Measurement |
|---|---|---|
(1) The water should not be aggressive. | ||
(2) Only in the case of surface water or groundwater that has been influenced by surface water. | ||
| Ammonium | 0.50 | mg/l |
| Chloride(1) | 250 | mg/l |
| Clostridium perfringens (including spores) | 0 | Number/100ml |
| Coliform bacteria | 0 | Number/100ml (Number/250ml in the case of water put into bottles or containers) |
| Colony counts | No abnormal change | Number/ml at 22ºC |
| Conductivity(1) | 2500 | µS/cm at 20ºC |
| 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(1) | 250 | mg/l |
| Total organic carbon (TOC) | No abnormal change | mgC/l |
| Turbidity(2) | 1 | NTU |
PART 3E+WRadioactive substances parameters
Commencement Information
I3Sch. 1 Pt. 3 in force at 20.11.2017, see reg. 1
TABLE D:
Prescribed values for radon, tritium and indicative dose of water intended for human consumption
Parameters | Maximum concentration or value | Units of Measurement |
|---|---|---|
(1) Enforcement action by the local authority is deemed justified on radiological protection grounds without further consideration where radon concentrations exceed 1,000 Bq/1. | ||
(2) 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) | 0.10 | mSv |
| Radon(1) | 100 | Bq/l |
| Tritium (for radioactivity)(2) | 100 | Bq/l |
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