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Hazardous substances (HSE guidance)

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Hazardous substances include all substances hazardous to health, controlled under COSHH, biocides and pesticides used in agriculture, horticulture and forestry (known as Poisonous Substances in Guernsey legislation)

We recognise the UK COSHH regulations as the appropriate standard.  Please see the useful links at the bottom of this page for additional guidance.


  • What are "poisonous substances" in Guernsey?

    • Unlike the UK, there is a single framework for the control of pesticides including plant protection products and biocides in Guernsey. This includes herbicides, insecticides, fungicides, algaecides, rodenticides etc, irrespective of their use (plant protection, or human / animal  / material protection).
    • Although the term pesticide is often used for plant protection products, it can also include biocides. For this reason, Guernsey legislation refers to Poisonous Substances.
    • The purpose of the Control of Poisonous Substances (Guernsey) Regulations, 2014 , is -
      • to protect the health and safety of human beings, animals and plants, and
      • to safeguard the environment, and in particular, to avoid pollution of water.
    • Pesticides in general, including plant protection products and biocides, are prescribed in the Control of Poisonous Substances (Guernsey) Regulations 2014 as any substance, preparation or organism prepared or used for any of the following purposes:
      • protecting plants or wood or other plant products from harmful organisms;
      • regulating the growth of plants;
      • giving protection against harmful creatures;
      • rendering such creatures harmless;
      • controlling organisms with harmful or unwanted effects on water systems, buildings or other structures, or on manufactured products; and
      • protecting animals against ectoparasites
  • Approved plant protection products and biocides (known as "poisonous substances" in Guernsey)

  • Antifouling Paints

  • What are my legal duties?

    • The Regulations control the importation, advertising, storage, sale, supply and use of prescribed substances. 
    • Amateur products acquired from a retail outlet can be used for private use.
    • Professional products are for professional users only (commercial use) and can only be purchased by persons who hold a certificate of competency. Only people with a current National Proficiency Test Council Certificate (NPTC) of Competence can purchase professional pesticides / chemicals, and a certificate and / or identity card must be shown at the time of purchase.   For Training Information  - Telephone the College of Further Education on 01481 737500.
    • For licensed pesticides , the commercial user will need to pdf icon apply to the HSE [440kb] before purchasing and applying the product.
  • Record keeping (including Pesticide Register)

    • A register must be kept by the employer under the provisions of the Poisonous Substances (Guernsey) Law, 1994.  All employees using a Poisonous Substance must be entered into this Register and the relevant information recorded.  pdf icon The PS3 register is available for download here [603kb].
    • A record of the risk assessment, material safety data sheet (MSDS), COSHH assessment and environmental assessment must be available to the workers using poisonous substances.
  • Pesticides, chemicals and hazardous waste disposal

    • HSE can provide initial advice about the safety of pesticides, chemicals and hazardous waste. You can contact HSE on 234567 or
    • Collection and disposal are carried out by States Works (Guernsey Waste) - 01481 246263 or
    • Domestic users
      • Contact States Works on 246263 for advice on disposal of pesticides and chemicals.  They will arrange a time for the collection of the unwanted items.
      • Do not transport hazardous substances to States Works or the landfill yourself for safety reasons, e.g. spillage en route / fumes from the chemicals.  Please do not dispose of them independently, seek the advice of States Works (Guernsey Waste) first.  Email:
      • This service is normally free to householders.
    • Professional / commercial waste
      • This service is chargeable for commercial waste.
      • For most commercial waste, you are able to choose your own licensed waste provider. Some waste can be disposed of locally, but some particularly hazardous chemicals have to be recycled or incinerated off-island.
      • Contact States Works (Guernsey Waste) on 246263 or Email:
    • Exporting hazardous waste
      • This is the most expensive form of disposal and the States of Guernsey fully recover the costs for this service.
      • The waste cannot be shipped until the Environment Agency in England and the Waste Regulator (Office of Environmental Health and Pollution Regulation) in Guernsey has checked every item for shipment.  A bond has to be taken out to cover the full cost of returning the waste to the consignor if necessary.
      • The waste has to be traceable - this is known as 'Cradle to Grave'.
      • Contact States Works (Guernsey Waste) on 246263 or Email:



COSHH Risk Assessment Example HSE Guernsey best practice PPE and RPE 2020 HSE Respiratory Protective Equipment (RPE) at work HSG53 Anti Fouling Paint-Import Application PS3 Pesticide Use Register (Guernsey) Poisonous Substances - Application to Use a Licensed Chemical List of Licensed & Prohibited Pesticides 2020 Notice of withdrawal of metaldehyde (2019) Notice of approval (Biocide) Decon7 Notice of withdrawal Chlorpyrifos (2019) Notice of approval (biocide) Guernsey seaweed hand sanitiser gel - March 2020 Notice of approval (biocide) TECcare products - April 2020 Notice of approval (biocide) IPT WHO liquid hand sanitiser - April 2020 Notice of approval (Biocide) Krystal Kleen products - May 2020 Notice of approval (biocide) Autoglym Hand Sanitiser - June 2020

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