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The Private Water Supplies (England) Regulations 2016
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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: | ||
| 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 |
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