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

Preliminary Opinion open for comments - Deadline for comments: 6 August 2022

Description

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
Contact:SANTE-C2-SCHEER@ec.europa.eu
On request from: European Commission
Adopted on: 4 July 2022

For the draft dossier on Environmental Quality Standards on Bisphenol-A, the SCHEER offers the following opinion:

A probabilistic approach was possible and this allowed an SSD-based freshwater MAC-QSfw,eco of 129 µg L-1 to be derived with a separate marine SSD able to generate a MAC-QSsw,eco of 31 µg L-1, both using an AF of 10. The SCHEER supports this approach but recommends amending the acute dataset (see answer to question 2. from the Commission).

The SCHEER notes that whilst Bisphenol-A (BPA) has a relatively rich dataset concerning its ED properties, there is still some controversy over its ED potency across taxonomic groups. The SCHEER does not endorse basing the final AA-QSfw, eco on the deterministic data evaluation. Instead, the SCHEER recommends using the best-fitting model as the basis for the probabilistic derivation of the final AA-QSfw, eco, using the amended chronic dataset (see answer to question 1. from the Commission).

The SCHEER supports the proposed QSfw sed of 0.82 mg kg-1 and QSsw sed of 0.16 mg kg-1 to protect benthic organisms.

To protect predators from secondary poisoning from BPA exposure through consumption of freshwater food, the SCHEER support the QSBiota, sec pois, fw in fish of 5.96 mg kg-1ww and 1.73 mg kg-1ww for bivalves, and the associated predicted QSfw biota for fish of 89 µg L-1 and QSfw biota for bivalves of 12 µg L-1. For marine predator secondary poisoning protection, the SCHEER support the QSBiota, sec pois, sw in fish of 2.98 mg kg-1ww and 0.17 mg kg-1ww for bivalves, and the associated predicted QSsw biota for fish of 44 µg L-1 and QSsw biota for bivalves of 1.2 µg L-1.

To protect human health, the QSbiota hh food of 0.005 µg kg-1 is dependent on a very low TDI of 0.04 ng BPA kg-1bw d-1 proposed by EFSA (2021) but which Scientific Opinion is not published yet. An EU drinking water QSdw, hh of 2.5 µg L-1 already exists however, if considering the TDI of 0.04 ng BPA kg-1bw d-1 (EFSA, 2021) the QSdw hh would be 2.8 ng L-1.

Keywords:

Bisphenol-A, Water Framework Directive, environmental quality standards

Opinion to be cited as:

SCHEER (Scientific Committee on Health, Environmental and Emerging Risks), Preliminary Opinion on Draft Environmental Quality Standards for Priority Substances under the Water Framework Directive, Bisphenol-A, 4 July 2022.

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