1.For the purposes of the assessment of the chemical status of a body or a group of bodies of groundwater pursuant to Section 2.3 of Annex V to Directive 2000/60/EC, Member States shall use the following criteria:
(a)groundwater quality standards as referred to in Annex I;
(b)threshold values to be established by Member States in accordance with the procedure set out in Part A of Annex II for the pollutants, groups of pollutants and indicators of pollution which, within the territory of a Member State, have been identified as contributing to the characterisation of bodies or groups of bodies of groundwater as being at risk, taking into account at least the list contained in Part B of Annex II.
The threshold values applicable to good chemical status shall be based on the protection of the body of groundwater in accordance with Part A, points 1, 2 and 3 of Annex II, having particular regard to its impact on, and interrelationship with, associated surface waters and directly dependent terrestrial ecosystems and wetlands and shall inter alia take into account human toxicology and ecotoxicology knowledge.
2.Threshold values can be established at the national level, at the level of the river basin district or the part of the international river basin district falling within the territory of a Member State, or at the level of a body or a group of bodies of groundwater.
3.Member States shall ensure that, for bodies of groundwater shared by two or more Member States and for bodies of groundwater within which groundwater flows across a Member State's boundary, the establishment of threshold values is subject to coordination between the Member States concerned, in accordance with Article 3(4) of Directive 2000/60/EC.
4.Where a body or a group of bodies of groundwater extends beyond the territory of the Community, the Member State(s) concerned shall endeavour to establish threshold values in coordination with the non-Member State(s) concerned, in accordance with Article 3(5) of Directive 2000/60/EC.
5.Member States shall establish threshold values pursuant to paragraph 1(b) for the first time by 22 December 2008.
All threshold values established shall be published in the river basin management plans to be submitted in accordance with Article 13 of Directive 2000/60/EC, and including a summary of the information set out in Part C of Annex II to this Directive.
6.Member States shall amend the list of threshold values whenever new information on pollutants, groups of pollutants, or indicators of pollution indicates that a threshold value should be set for an additional substance, that an existing threshold value should be amended, or that a threshold value previously removed from the list should be re-inserted, in order to protect human health and the environment.
Threshold values can be removed from the list when the body of groundwater concerned is no longer at risk from the corresponding pollutants, groups of pollutants, or indicators of pollution.
Any such changes to the list of threshold values shall be reported in the context of the periodic review of the river basin management plans.
7.The Commission shall publish a report by 22 December 2009 on the basis of the information provided by Member States in accordance with paragraph 5.