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SCHEER - Scientific Opinion on "Draft Environmental Quality Standards for Priority Substances under the Water Framework Directive" - Cypermethrin

Final Opinion


SCHEER WG on Water Framework Directive
SCHEER members: Marian Scott (Chair), Marco Vighi (Rapporteur), Thomas Backhaus, Teresa Borges, Peter Hoet, Pim de Voogt, Rodica Mariana Ion
External experts: Andrew Johnson, Jan Linders
On request from: European Commission
Adopted on: 9 August 2022

The dossier on Environmental Quality Standards for “Cypermethrin” is reviewed by the SCHEER according to the general mandate on EQS dossiers.

The SCHEER accepts with reservations the MAC-QSfw,eco = 0.6 ng L-1 and the MAC-QSsw,eco = 0.06 ng L-1 derived with a probabilistic procedure. It is the opinion of the SCHEER that a more careful collection of data should be performed.

For the same reason, the SCHEER does not endorse the AA-QSfw, eco and the AA-QSsw, eco. In particular, the SCHEER cannot accept, without sufficient transparent support, that the probabilistic approach SSD cannot be applied due to the lack of data.

The SCHEER cannot endorse the proposed QSsediment because data, reported in the 2011 dossier and relevant for deriving the QS, are not reported in the present dossier.

The SCHEER endorses the QSbiota,secpois,fw = 1.0 mg kg-1 for fish and 0.30 mg kg-1 for bivalves, as well as the back-calculated QSfw, biota = 0.87 μg L-1 for fish and QSfw, biota = 0.25 μg L-1 for bivalves.

For human health, different QS are derived for cypermethrin, alpha-cypermethrin and zeta-cypermethrin, due to different ADI values. However, in the EU evaluation of cypermethrin under PPP and Biocides Directives, only the ADI for cypermethrin was used.

Therefore, for the sake of “one substance, one assessment” harmonisation, it is the opinion of the SCHEER that the same approach should be used. Using themostrecent ADI proposed by EFSA, the SCHEER proposes the QSbiota,hh =0.61 mg kg-1biota , for cypermethrin, as well as the back-calculated QSwater, hh food = 0.51 μg L-1.

For the exposure via drinking water, the SCHEER agrees with the adoption of the general drinking water standard for pesticides (QSdw,hh = 0.1 μg L-1).

The most critical EQS cannot be indicated by the SCHEER because some relevant QS have not been endorsed.

To harmonise the dossier with the other pyrethroid dossiers, the SCHEER suggests including a section for the estimation of EQSwater,total.


Cypermethrin, Water Framework Directive, environmental quality standards

Opinion to be cited as:

SCHEER (Scientific Committee on Health, Environmental and Emerging Risks), Final Opinion on Draft Environmental Quality Standards for Priority Substances under the Water Framework Directive - cypermethrin, 9 August 2022.


27 JUNE 2022
(294.82 KB - PDF)