2. Where Member States conclude, on the basis of the general analysis carried out under point (a) of the first subparagraph of paragraph 1, that there is a risk to human health stemming from domestic distribution systems or from the related products and materials, or where monitoring performed in accordance with point (b) of the first subparagraph of paragraph 1 demonstrates that the parametric values set out in Part D of Annex I are not met, Member States shall ensure that appropriate measures are taken to eliminate or reduce the risk of non-compliance with the parametric values set out in Part D of Annex I.
In relation to Legionella, those measures shall target at least priority premises.