- Y Diweddaraf sydd Ar Gael (Diwygiedig)
- Gwreiddiol (a wnaed Fel)
The Private Water Supplies Regulations 2009
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Rhagor o Adnoddau
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Dyma’r fersiwn wreiddiol (fel y’i gwnaed yn wreiddiol).
Regulations 4, 10, 15 and 17
SCHEDULE 1Concentrations or Values
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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: | ||
| 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
| 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— | ||||||
| organic insecticides | ||||||
| organic herbicides | ||||||
| organic fungicides | ||||||
| organic nematocides | ||||||
| organic acaricides | ||||||
| organic algicides | ||||||
| organic rodenticides | ||||||
| organic slimicides | ||||||
| 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. | ||||||
(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: | ||||||
| benzo(b)fluoranthene | ||||||
| benzo(k)fluoranthene | ||||||
| benzo(ghi)perylene | ||||||
| indeno(1,2,3-cd)pyrene. | ||||||
| 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: | ||||||
| chloroform | ||||||
| bromoform | ||||||
| dibromochloromethane | ||||||
| bromodichloromethane. | ||||||
| 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 | 25 (until 25th December 2013) | μg/l | ||||
| 10 (from 25th December 2013) | 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 | ||||
| National requirements – Prescribed concentrations or values | ||||||
| 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
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) Excluding tritium, potassium-40, radon and radon decay products. | ||||
(iii) 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 | ||
| Coliform bacteria | 0 | Number/100ml (Number/250 ml in the case of water put into bottles or containers) | ||
| Colony counts | No abnormal change No abnormal change | Number/ml at 22°C 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 indicative dose (for radioactivity) (ii) | 0.10 | mSv/year | ||
| Total organic carbon (TOC) | No abnormal change | mgC/l | ||
Tritium (for radioactivity) | 100 | Bq/l | ||
| Turbidity(iii) | 1 | NTU | ||
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