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CHSA publishes guidance for members calculating carbon emissions
03 September 2025
THE CLEANING & Hygiene Suppliers Association (CHSA) has published guidance for members on how to calculate and report their carbon emissions. It includes a guide on the process of calculating and reporting carbon emissions and a recording of a webinar in which experts provided advice and answered members’ questions.

Lorcan Mekitarian, Chair of the CHSA, said: “Carbon reporting is important for our members. It provides the information they need to support the move towards Net Zero but the process is complex. This guidance has been developed to help our members navigate these complexities.
“Our goal, as always, is to advocate an ethical approach. We are supporting our members to genuinely cut their carbon emissions and be transparent in the approach. This philosophy aligns to our Code of Practice and Ethical Marketing Commitment. Signed by every member, they require them to be open and honest in their business conduct and for statements and claims to be truthful and supported by evidence. This philosophy is at the heart of all we do.”
The CHSA’s guide on how to calculate the carbon footprint outlines a five-step process.
- Step 1 is to understand the Greenhouse Gas (GHG) Protocol’s Scope 1, 2 and 3 emissionsand which elements are relevant to the business
- Step 2 is to find a third party to assist with the data collection and calculation. There are many tools available to ease the process of collection and calculation
- Step 3 is to collect the data
- Step 4 is to obtain independent verification of the data
- Step 5 is to use the information gather to create and deliver a carbon reduction plan.
The guide also explains the GHG Protocols Scopes 1, 2 and 3 and outlines a high-levelmethodology for data collection.
The webinar focused on how to calculate and verify carbon emissions. Experts from Planet Mark, Nero and Interface explained the jargon, Net Zero and its importance, and Scopes 1, 2 and 3. They discussed how to gather the data and the associated opportunities and risks, and finally the value of verification. They also answered questions, which included who in the supply chain is responsible for calculating and counting which emission? What’s the right methodology for the calculation?
The guide and the webinar recording are both available now on the CHSA website: https://chsa.co.uk/roadmap-to-sustainability
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