Annex I, Part A - Priority Substances & Pollutants in water

This list contains environmental quality standards (EQS), including annual averages and maximum allowable concentrations, for priority substances and certain other pollutants as provided for in Article 16 of Directive 2000/60/EC.

PAH;Polyaromatic hydrocarbons

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5 Where the MAC-EQS are not applicable, the AA-EQS values are considered protective against short-term pollution peaks in continuous discharges since they are significantly lower than the values derived on the basis of acute toxicity.

16 For the group of priority substances of polyaromatic hydrocarbons (PAH) (No 28), the biota EQS and corresponding AA-EQS in water refer to the concentration of benzo(a)pyrene, on the toxicity of which they are based. Benzo(a)pyrene can be considered as a marker for the other PAHs, hence only benzo(a)pyrene needs to be monitored for comparison with the biota EQS or the corresponding AA-EQS in water.

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