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The Private Water Supplies (Wales) Regulations 2010 (revoked)
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Changes over time for: SCHEDULE 1
Version Superseded: 20/11/2017
Alternative versions:
- 04/02/2010- Amendment
- 14/04/2016- Amendment
- 14/04/2016
Point in time - 20/11/2017- Amendment
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Point in time view as at 14/04/2016.
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Regulations 4, 10, 15 and 17
SCHEDULE 1E+WConcentrations or Values
PART 1 E+WWholesomeness
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 | 0 | Number/250ml |
| Pseudomonas aeruginosa | 0 | Number/250ml |
| Colony count 22°C | 100 | Number/ml |
| Colony count 37°C | 20 | Number/ml |
TABLE B:CHEMICAL PARAMETERS
Prescribed concentrations 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:
related products (inter alia, growth regulators) and their relevant metabolites, degradation and reaction products. Only those pesticides likely to be present in a given supply need be monitored. | ||
4 “Pesticides total” means the sum of the concentrations of the individual pesticides detected and quantified in the monitoring process. | ||
5
| ||
6 The parametric value applies to the sum of the concentrations of the individual compounds detected and quantified in the monitoring process. | ||
7
| ||
| Parameters | Maximum concentration or value | Units of Measurement |
|---|---|---|
| Acrylamide 1 | 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 1 | 0.10 | μg/l |
| Fluoride | 1.5 | mg/l |
| Lead | 25 (until 25th December 2013) | μg/l |
| 10 (from 25th December 2013) | μg/l | |
| Mercury | 1.0 | μg/l |
| Nickel | 20 | μg/l |
| Nitrate 2 | 50 | mg/l |
| Nitrite2 | 0.5 (or 0.1 in the case of treatment works) | mg/l |
| Pesticides 3— | ||
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 4 | 0.50 | μg/l |
| Polycyclic aromatic hydrocarbons 5 | 0.10 | μg/l |
| Selenium | 10 | μg/l |
| Tetrachloroethene and Trichloroethene 6 | 10 | μg/l |
| Trihalomethanes: Total 7 | 100 | μg/l |
| Vinyl chloride 1 | 0.50 | μg/l |
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 2 E+WIndicator Parameters
TABLE C
Prescribed concentrations, values or states
1 The water should not be aggressive. | ||
| F1. . . | ||
3 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 |
| Chloride 1 | 250 | mg/l |
| Clostridium perfringens | 0 | Number/100ml |
| (including spores) | ||
| 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 22°C |
| No abnormal change | Number/ml at 37°C | |
| Conductivity 1 | 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 1 | 250 | mg/l |
| F2. . . | F2. . . | F2. . . |
| Total organic carbon (TOC) | No abnormal change | mgC/l |
| F3. . . | F3. . . | F3. . . |
| Turbidity3 | 1 | NTU |
Textual Amendments
F1Words in Sch. 1 Pt. 2 omitted (14.4.2016) by virtue of The Private Water Supplies (Wales) (Amendment) Regulations 2016 (S.I. 2016/411), regs. 1(1), 4(c)
F2Words in Sch. 1 Pt. 2 omitted (14.4.2016) by virtue of The Private Water Supplies (Wales) (Amendment) Regulations 2016 (S.I. 2016/411), regs. 1(1), 4(a)
F3Words in Sch. 1 Pt. 2 omitted (14.4.2016) by virtue of The Private Water Supplies (Wales) (Amendment) Regulations 2016 (S.I. 2016/411), regs. 1(1), 4(b)
[F4PART 3E+WRadioactive substances parameters
Textual Amendments
F4Sch. 1 Pt. 3 inserted (14.4.2016) by The Private Water Supplies (Wales) (Amendment) Regulations 2016 (S.I. 2016/411), reg. 1(1), Sch. 1
TABLE D
Parametric values for radon, tritium and ID of water intended for human consumption
(i) Enforcement action by the local authority is deemed justified on radiological protection grounds without further consideration where radon concentrations exceed 1,000 Bq/1. | |||
(ii) 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 | Units of measurement | |
|---|---|---|---|
| Indicative dose (for radioactivity) | 0,10 | mSv | |
| Radon | 100 | Bq/1 | |
| Tritium (for radioactivity) | 100 | Bq/l | |
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