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The Water Supply (Water Quality) Regulations 2001
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TABLE A2PARAMETERS IN RELATION TO WHICH METHODS OF ANALYSIS MUST SATISFY PRESCRIBED CHARACTERISTICS
| (1) | (2) | (3) | (4) |
|---|---|---|---|
| Parameters | Trueness % of prescribed concentration or value or specification | Precision % of prescribed concentration or value or specification | Limit of detection % of prescribed concentration or value or specification |
Notes: | |||
(i) The method of analysis should determine total cyanide in all forms. | |||
(ii) The performance characteristics apply to each individual pesticide and will depend on the pesticide concerned. | |||
(iii) The performance characteristics apply to the individual substances specified at 25% of the parametric value in Part I of Table B in Schedule 1. | |||
(iv) The performance characteristics apply to the individual substances specified at 50% of the parametric value in Part I of Table B in Schedule 1. | |||
(v) The performance characteristics apply to the prescribed value of 4NTU. | |||
(vi) The performance characteristics apply to the specification of 1NTU for water leaving treatment works. | |||
| Aluminium | 10 | 10 | 10 |
| Ammonium | 10 | 10 | 10 |
| Antimony | 25 | 25 | 25 |
| Arsenic | 10 | 10 | 10 |
| Benzene | 25 | 25 | 25 |
| Benzo(a)pyrene | 25 | 25 | 25 |
| Boron | 10 | 10 | 10 |
| Bromate | 25 | 25 | 25 |
| Cadmium | 10 | 10 | 10 |
| Chloride | 10 | 10 | 10 |
| Chromium | 10 | 10 | 10 |
| Colour | 10 | 10 | 10 |
| Conductivity | 10 | 10 | 10 |
| Copper | 10 | 10 | 10 |
| Cyanide(i) | 10 | 10 | 10 |
| 1,2-dichloroethane | 25 | 25 | 10 |
| Fluoride | 10 | 10 | 10 |
| Iron | 10 | 10 | 10 |
| Lead | 10 | 10 | 10 |
| Manganese | 10 | 10 | 10 |
| Mercury | 20 | 10 | 20 |
| Nickel | 10 | 10 | 10 |
| Nitrate | 10 | 10 | 10 |
| Nitrite | 10 | 10 | 10 |
| Pesticides and related products(ii) | 25 | 25 | 25 |
| Polycyclic aromatic hydrocarbons(iii) | 25 | 25 | 25 |
| Selenium | 10 | 10 | 10 |
| Sodium | 10 | 10 | 10 |
| Sulphate | 10 | 10 | 10 |
| Tetrachloromethane | 20 | 20 | 20 |
| Trichloroethene(iv) | 25 | 25 | 10 |
| Trihalomethanes: Total(iii) | 25 | 25 | 10 |
| Turbidity(v) | 10 | 10 | 10 |
| Turbidity (vi) | 25 | 25 | 25 |
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