Division 1 Chemical and indicator parameters
United Kingdom
For the parameters set out in Table 1 of this Annex, the method of analysis used shall, as a minimum, be capable of measuring concentrations equal to the parametric value with a limit of quantification, as defined in point (2) of Article 2 of Commission Directive 2009/90/ECf1, of 30 % or less of the relevant parametric value and an uncertainty of measurement as specified in Table 1 of this Annex. The result shall be expressed using at least the same number of significant figures as for the parametric value referred to in Parts B and C of Annex I to this Directive.
The uncertainty of measurement laid down in Table 1 shall not be used as an additional tolerance to the parametric values set out in Annex I.
Table 1. Minimum performance characteristic ‘Uncertainty of measurement’
| Parameters | Uncertainty of measurement(See Note 1)% of the parametric value (except for pH) | Notes |
|---|---|---|
| Aluminium | 25 | |
| Ammonium | 40 | |
| Acrylamide | 30 | |
| Antimony | 40 | |
| Arsenic | 30 | |
| Benzo(a)pyrene | 50 | See Note 2 |
| Benzene | 40 | |
| Bisphenol A | 50 | |
| Boron | 25 | |
| Bromate | 40 | |
| Cadmium | 25 | |
| Chloride | 15 | |
| Chlorate | 40 | |
| Chlorite | 40 | |
| Chromium | 30 | |
| Copper | 25 | |
| Cyanide | 30 | See Note 3 |
| 1,2-dichloroethane | 40 | |
| Epichlorohydrin | 30 | |
| Fluoride | 20 | |
| HAAs | 50 | |
| Hydrogen ion concentration pH | 0,2 | See Note 4 |
| Iron | 30 | |
| Lead | 30 | |
| Manganese | 30 | |
| Mercury | 30 | |
| Microcystin-LR | 30 | |
| Nickel | 25 | |
| Nitrate | 15 | |
| Nitrite | 20 | |
| Oxidisability | 50 | See Note 5 |
| Pesticides | 30 | See Note 6 |
| PFAS | 50 | |
| Polycyclic aromatic hydrocarbons | 40 | See Note 7 |
| Selenium | 40 | |
| Sodium | 15 | |
| Sulphate | 15 | |
| Tetrachloroethene | 40 | See Note 8 |
| Trichloroethene | 40 | See Note 8 |
| Trihalomethanes – total | 40 | See Note 7 |
| Total organic carbon (TOC) | 30 | See Note 9 |
| Turbidity | 30 | See Note 10 |
| Uranium | 30 | |
| Vinyl chloride | 50 |
Annotations
Footnotes
- f1
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Commission Directive 2009/90/EC of 31 July 2009 laying down, pursuant to Directive 2000/60/EC of the European Parliament and of the Council, technical specifications for chemical analysis and monitoring of water status (OJ L 201, 1.8.2009, p. 36).