Part B

List of parameters Group A The following parameters (Group A) shall be monitored in accordance with the monitoring frequencies set out in Table 1 of point 2: Escherichia coli (E. coli), intestinal enterococci, coliform bacteria, colony count 22 °C, colour, turbidity, taste, odour, pH and conductivity; other parameters identified as relevant in the monitoring programme, in accordance with Article 5(3) and, where relevant, through a risk assessment of the supply system as set out in Article 9 and Part C of this Annex. Under specific circumstances, the following parameters shall be added to the Group A parameters: ammonium and nitrite, if chloramination is used; aluminium and iron, if used as water treatment chemicals. Escherichia coli (E. coli) and intestinal enterococci are considered ‘core parameters’ and their monitoring frequencies shall not be the subject of a reduction due to a risk assessment of the supply system in accordance with Article 9 and Part C of this Annex. They shall always be monitored at least at the frequencies set out in Table 1 of point 2. Group B In order to determine compliance with all parametric values set out in this Directive, all other parameters not analysed under Group A and set in accordance with Article 5, except for parameters in Part D of Annex I, shall be monitored at least at the frequencies set out in Table 1 of point 2, unless a different sampling frequency is determined on the basis of a risk assessment of the supply system carried out in accordance with Article 9 and Part C of this Annex. Sampling frequencies Table 1. Minimum frequency of sampling and analysis for compliance monitoring Note 1: A supply zone is a geographically defined area within which water intended for human consumption comes from one or more sources and within which the water quality can be considered as being approximately uniform. Note 2: The volumes are calculated as averages taken over a calendar year. The number of inhabitants in a supply zone may be used instead of the volume of water to determine the minimum frequency, assuming water consumption of 200 l/(day*capita). Note 3: The frequency indicated is calculated as follows: e.g. 4 300 m^(3)/d = 16 samples for Group A parameters (four for the first 1 000 m^(3)/d + 12 for additional 3 300 m^(3)/d). Note 4: For water suppliers, where an exemption has not been granted under point (b) of Article 3(3), Member States shall lay down the minimum sampling frequency for parameters of Groups A and B, provided that core parameters are monitored at least once per year. Note 5: Member States may reduce the sampling frequency, provided that all parameters set in accordance with Article 5 are monitored at least once every six years and are monitored in cases where a new water source is integrated into the water supply system or changes to that system, as a result of which a potentially adverse effect on the quality of water is to be expected, are made. Volume of water distributed or produced each day within a supply zone (See Notes 1 and 2) m^(3) Group A parameter number of samples per year Group B parameter number of samples per year < 10 > 0 (See Note 4) > 0 (See Note 4) ≥ 10 ≤ 100 2 1 (See Note 5) > 100 ≤ 1000 4 1 > 1000 ≤ 10000 4 for the first 1 000 m^(3)/d + 3 for each additional 1 000 m^(3)/d and part thereof of the total volume (See Note 3) 1 for the first 1 000 m^(3)/d + 1 for each additional 4 500 m^(3)/d and part thereof of the total volume (See Note 3) > 10000 ≤ 100000 3 for first 10 000 m^(3)/d + 1 for each additional 10 000 m^(3)/d and part thereof of the total volume (See Note 3) > 100000 12 for first 100 000 m^(3)/d + 1 for each additional 25 000 m^(3)/d and part thereof of the total volume (See Note 3)

← anx_II__cpt_1__point_4__text_1 · All articles · 1. →

Source: EUR-Lex (Cellar) · retrieved 2026-10-28 · Text as adopted (Official Journal); later amendments are not incorporated in this text.