+Article 6a 6.

Article 6a 6.

Member States shall monitor each substance, group of substances, and indicator on the watch list referred to in paragraph 1 at selected representative monitoring stations over a 24-month period. The monitoring period shall commence within six months of the establishment of the watch list, but sampling and analysis need not commence at the start of that period.

Each Member State shall select at least two monitoring stations, plus the number of stations equal to its total area in km2 of groundwater bodies divided by 45 000 , rounded to the nearest integer.

In selecting the representative monitoring stations, the monitoring frequency and the timing for each substance, group of substances, or indicator, Member States shall take into account seasonal variability in rainfall, water levels, use patterns and the possibility of the substance, group of substances, or indicator occurring. The frequency of monitoring shall be not less than once per year.

Where a Member State is in a position to generate sufficient, comparable, representative and recent monitoring data for a particular substance, group of substances, or indicator from existing monitoring programmes or studies, it may decide not to undertake additional monitoring under the watch list mechanism for that substance, group of substances, or indicator, provided that the substance, group of substances, or indicator was monitored using a methodology that is compliant with the methods of analysis referred to in the implementing act establishing the watch list.

1. Vue d’ensemble

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1.1 Références

1.2 Exigences identifiées

1.3 Normes associées

2. Exigences identifiées

Exigences

3. Normes associées

Normes