HSE Pesticides eBulletin: Proposed GB Maximum Residue Levels – Chlorothalonil / Proposed Withdrawal of GB Approval of an Active Substance

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HSE eBulletin

Proposed future GB MRL amendments - Chlorothalonil

Maximum residue levels (MRLs) for pesticide residues in or on food and feed of plant and animal origin are established in Great Britain (GB) under Regulation (EC) No 396/2005.


GB MRLs are set by inclusion in a new Statutory Register.


This eBulletin is to notify all stakeholders of recent amendments to the GB MRL Statutory Register, setting new statutory levels.


Retained Regulation (EC) No 396/2005 on maximum residue levels of pesticides in or on food and feed of plant and animal origin (as it applies in Great Britain, pursuant to the European Union (Withdrawal) Act 2018 and European Union (Withdrawal Agreement Act 2020). Great Britain (“GB”) refers to England, Scotland and Wales).

Chlorothalonil is no longer an approved active substance in GB and all plant protection product authorisations have been withdrawn.


As harmful effects on human health cannot be excluded, it is proposed to lower all MRLs for chlorothalonil to the limit of quantification.


The draft Reasoned Opinion of the review of the MRLs for chlorothalonil is available here.


The proposed date of adoption/publication of the new MRLs is 5 September 2022 and the proposed date of entry into force of the new MRLs will be six months after the date of adoption/publication.


To meet the UK’s international trade obligations, the measures have been notified to the World Trade Organization and this notification can be found at this link.


On completion of this process, an update on the final MRLs agreed, along with the date of entry into force, will be communicated via HSE’s eBulletin service. 


View more information and guidance on the MRL processes for GB.

Proposal to withdraw approval of the active substance alpha-cypermethrin

HSE has conducted a review of the approval of the active substance alpha-cypermethrin and proposes to withdraw the approval.


The renewal of approval of alpha-cypermethrin in 2019 included requirements for the producer of the active substance to provide certain information to confirm the assessment. The producer has indicated that it does not intend to provide that information, and HSE has therefore reviewed the approval.


Having considered this statement alongside the other information and matters relevant to the review, HSE proposes to withdraw approval of alpha-cypermethrin in GB. Without that information, it is not possible to confirm that plant protection products containing this active substance continue to meet the standards required for authorisation.


Details of this proposal will now be forwarded to the World Trade Organisation for consultation with trading partners.


Further information relating to the approval of alpha-cypermethrin will be recorded in the statutory approvals register of active substances.

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