http://www.legislation.gov.uk/id/eudr/1998/83/annex/III

ANNEX IIISPECIFICATIONS FOR THE ANALYSIS OF PARAMETERS

F1PART BChemical and indicator parameters for which performance characteristics are specified

Annotations:

Amendments (Textual)

Substituted by Commission Directive (EU) 2015/1787 of 6 October 2015 amending Annexes II and III to Council Directive 98/83/EC on the quality of water intended for human consumption.

F11.Chemical and indicator parameters

For the parameters set out in Table 1, the specified performance characteristics are that the method of analysis used must, as a minimum, be capable of measuring concentrations equal to the parametric value with a limit of quantification, as defined in Article 2(2) of Commission Directive 2009/90/EC39, of 30 % or less of the relevant parametric value and an uncertainty of measurement as specified in Table 1. The result shall be expressed using at least the same number of significant figures as for the parametric value considered in Parts B and C of Annex I.

Until 31 December 2019 Member States may allow for the use of ‘trueness’, ‘precision’ and ‘limit of detection’ as specified in Table 2, as an alternative set of performance characteristics to ‘limit of quantification’ and ‘uncertainty of measurement’ as specified respectively in the first paragraph and Table 1.

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 1Minimum performance characteristic ‘Uncertainty of measurement’

Parameters	Uncertainty of measurement(See Note 1)% of the parametric value (except for pH)	Notes
Aluminium	25
Ammonium	40
Antimony	40
Arsenic	30
Benzo(a)pyrene	50	See Note 5
Benzene	40
Boron	25
Bromate	40
Cadmium	25
Chloride	15
Chromium	30
Conductivity	20
Copper	25
Cyanide	30	See Note 6
1,2-dichloroethane	40
Fluoride	20
Hydrogen ion concentration pH (expressed in pH units)	0,2	See Note 7
Iron	30
Lead	25
Manganese	30
Mercury	30
Nickel	25
Nitrate	15
Nitrite	20
Oxidisability	50	See Note 8
Pesticides	30	See Note 9
Polycyclic aromatic hydrocarbons	50	See Note 10
Selenium	40
Sodium	15
Sulphate	15
Tetrachloroethene	30	See Note 11
Trichloroethene	40	See Note 11
Trihalomethanes — total	40	See Note 10
Total organic carbon (TOC)	30	See Note 12
Turbidity	30	See Note 13
Acrylamide, epichlorohydrin and vinyl chloride to be controlled by product specification.

Table 2Minimum performance characteristics ‘Trueness’, ‘precision’ and ‘limit of detection’ — may be used until 31 December 2019

Parameters	Trueness(See Note 2)% of the parametric value (except for pH)	Precision(See Note 3)% of the parametric value (except for pH)	Limit of detection(See Note 4)% of the parametric value (except for pH)	Notes
Aluminium	10	10	10
Ammonium	10	10	10
Antimony	25	25	25
Arsenic	10	10	10
Benzo(a)pyrene	25	25	25
Benzene	25	25	25
Boron	10	10	10
Bromate	25	25	25
Cadmium	10	10	10
Chloride	10	10	10
Chromium	10	10	10
Conductivity	10	10	10
Copper	10	10	10
Cyanide	10	10	10	See Note 6
1,2-dichloroethane	25	25	10
Fluoride	10	10	10
Hydrogen ion concentration pH (expressed in pH units)	0,2	0,2		See Note 7
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
Oxidisability	25	25	10	See Note 8
Pesticides	25	25	25	See Note 9
Polycyclic aromatic hydrocarbons	25	25	25	See Note 10
Selenium	10	10	10
Sodium	10	10	10
Sulphate	10	10	10
Tetrachloroethene	25	25	10	See Note 11
Trichloroethene	25	25	10	See Note 11
Trihalomethanes — total	25	25	10	See Note 10
Turbidity	25	25	25
Acrylamide, epichlorohydrin and vinyl chloride to be controlled by product specification.

F12.Notes to Tables 1 and 2

Note 1	Uncertainty of measurement is a non-negative parameter characterising the dispersion of the quantity values being attributed to a measurand, based on the information used. The performance criterion for measurement uncertainty (k = 2) is the percentage of the parametric value stated in the table or better. Measurement uncertainty shall be estimated at the level of the parametric value, unless otherwise specified.
Note 2	Trueness is a measure of systematic error, i.e. the difference between the mean value of the large number of repeated measurements and the true value. Further specifications are those set out in ISO 5725.
Note 3	Precision is a measure of random error and is usually expressed as the standard deviation (within and between batches) of the spread of results from the mean. Acceptable precision is twice the relative standard deviation. This term is further specified in ISO 5725.
Note 4	Limit of detection is either: three times the standard deviation within a batch of a natural sample containing a low concentration of the parameter, or five times the standard deviation of a blank sample (within a batch).
Note 5	If the value of uncertainty of measurement cannot be met, the best available technique should be selected (up to 60 %).
Note 6	The method determines total cyanide in all forms.
Note 7	Values for trueness, precision and uncertainty of measurement are expressed in pH units.
Note 8	Reference method: EN ISO 8467
Note 9	The performance characteristics for individual pesticides are given as an indication. Values for the uncertainty of measurement as low as 30 % can be achieved for several pesticides, higher values up to 80 % may be allowed for a number of pesticides.
Note 10	The performance characteristics apply to individual substances, specified at 25 % of the parametric value in Part B of Annex I.
Note 11	The performance characteristics apply to individual substances, specified at 50 % of the parametric value in Part B of Annex I.
Note 12	The uncertainty of measurement should be estimated at the level of 3 mg/l of the total organic carbon (TOC). CEN 1484 Guidelines for the determination of TOC and dissolved organic carbon (DOC) shall be used.
Note 13	The uncertainty of measurement should be estimated at the level of 1,0 NTU (nephelometric turbidity units) in accordance with EN ISO 7027.