# Directive (EU) 2020/2184 of the European Parliament and of the Council of 16 December 2020 on the quality of water intended for human consumption (recast) (Text with EEA relevance), Division 1: Chemical and indicator parameters

Extent: E+W+S+N.I.

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/EC, 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

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Source: https://www.legislation.gov.uk/eudr/2020/2184/annex/III/part/B/division/1 (the official version)
Page: https://openlegislation.uk/eu-directive-2020-2184/annex-III/part-B/division-1
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.