What is measured and why
The carbon footprint of an occupational prevention service quantifies greenhouse gas emissions associated with an organisation or defined boundary over a period. It is commonly expressed in tonnes of carbon dioxide equivalent, allowing gases with different climate effects to be combined using identified conversion factors.
It helps identify important sources and prioritise reductions, but does not itself measure the quality of preventive advice, worker exposure or accident performance. A small service may emit less in absolute terms because it delivers less activity. Interpretation needs the scope, workload and methodology, without treating an environmental figure as an accreditation of occupational safety and health excellence or evidence that every service requirement has been met.
Define the organisation, period and boundaries
First determine which entity, sites and activities are included. An internal prevention service may form part of its employer’s corporate inventory, while an external provider may calculate its offices, mobile units and other operations. The chosen consolidation approach should be documented and applied consistently.
The reporting year and operations under organisational control or external relationships also need identification. Shared premises, leased vehicles and use of client facilities require clear allocation criteria. Partial consumption figures should not be added without checking whether they are already included elsewhere. Boundaries enable the calculation to be repeated and exclusions explained, particularly where several services share resources, contracts and invoices.
Sources: [1]
Scope 1: direct emissions
Sources may include fuel used by vehicles controlled by the organisation, its own heating and refrigerant leakage from equipment within the boundary. Services with mobile units may need to distinguish travel fuel from other vehicle consumption where the methodology requires it. Each source needs verifiable data and consistent units.
Invoices, fuel cards, maintenance records and refrigerant refills can provide evidence. Financial expenditure does not automatically equal litres consumed. If missing records require estimation, the method and uncertainty should be explained. An electric vehicle has no exhaust emissions during use, but its energy consumption does not disappear from the inventory and must be assigned appropriately rather than being omitted as “zero emission travel”.
Scope 2: purchased energy
Scope 2 covers emissions from generating purchased and consumed electricity, heat, steam or cooling. Shared offices or clinical facilities may need a documented allocation method, preferably supported by measurement. Floor area can be an approximation, but may not reflect different equipment use or operating hours.
Renewable electricity procurement requires evidence and compliance with the chosen framework’s rules. GHG Protocol distinguishes methods and quality criteria for contractual instruments; writing “green energy” in a report is insufficient. Emission factors must remain traceable, and results from different accounting approaches should not be mixed without explanation. A change in the accounting method can otherwise look like an operational improvement when consumption has not changed.
Sources: [2]
Scope 3: travel and the value chain
Relevant categories for a prevention service may include business travel using external transport, employee commuting, purchased goods, equipment, digital services, waste and contracted activities. Their importance should be assessed from actual operations rather than assumed. Scope 3 adds information absent from an inventory limited to owned fuel consumption and electricity.
Supplier figures may use different boundaries and methods. Reported emissions for one digital service are not necessarily comparable with another. Significant omissions and double counting within the inventory should be avoided, with scopes kept distinct. Category selection and exclusions need transparent justification rather than being chosen for the convenience of obtaining a low number or avoiding difficult data collection.
Sources: [3]
Activity data, factors and units
Calculation commonly combines activity data with an appropriate emission factor. The factor’s year, geography, source, technology, unit and coverage need checking. Multiplying distance by a passenger-kilometre factor differs from using a vehicle-kilometre factor, even where both initially appear to describe the same journey.
Working records should retain original values, conversions and references. Where a factor already includes carbon dioxide equivalents, gas conversion should not be applied again. Uses linked to the Spanish registry require consultation of the relevant MITECO instructions and factors. The inventory should distinguish measurement, calculation and estimation so a reviewer can understand the origin of each result and reproduce the arithmetic rather than relying on a final total.
Quality, base year and comparability
A reliable time series needs consistent criteria and explanations of changes in sites, acquisitions, outsourcing or methodology. A reduction caused by transferring activity to a supplier does not necessarily mean its impact was eliminated. The analysis should check whether emissions merely moved to another scope or outside the observed boundary.
Keeping an inventory of sources, owners and evidence is useful alongside the final result. Review can identify unusual consumption, missing months, duplicates and unit errors. Base year recalculation rules should follow the chosen framework. Not every change requires deletion of the earlier series; it may require explanation and transparently adjusted comparisons that preserve the distinction between actual and methodological changes.
Sources: [1]
Reduce emissions while preserving preventive quality
Combining compatible visits, improving routes or avoiding unnecessary face-to-face meetings may reduce travel. Decisions must nevertheless preserve activities requiring attendance, direct observation or specific equipment. Carbon accounting does not justify replacing a necessary in-person assessment with a remote administrative exercise or delaying necessary intervention.
Energy efficiency, facility maintenance and procurement can also be reviewed with safety, hygiene and accessibility in mind. Reducing ventilation to save energy can worsen workplace conditions. Alternatives need joint assessment of environmental savings, service effectiveness and risks to workers and users. Digital documentation can help, but does not establish that digital activity has no emissions or that every technical or healthcare visit can be replaced remotely.
Purchases, equipment and healthcare waste
Durable, repairable equipment may be an option where it meets technical and preventive requirements. Comparing alternatives requires information about service life, maintenance, calibration and final disposal. Extending an instrument’s use is not an improvement if it undermines measurement reliability or fails safety requirements.
Healthcare activities must retain applicable hygiene, sterility and waste management requirements. A material reduction target does not authorise reuse of single-use items outside legally and technically permitted conditions. Environmental assessment belongs in purchasing decisions within these boundaries. It is also useful to distinguish expenditure based estimates from product or supplier specific information, because their precision and suitability for comparing alternatives can differ substantially.
Audit, verification and registration in Spain
In Spain, Royal Decree 214/2025 regulates the registry and establishes calculation and reduction plan obligations for specified entities. Being an occupational prevention service does not, by itself, make every requirement applicable. Organisational scope, reporting year and specific conditions need checking.
Internal review, external verification and registration are different actions. The MITECO registry has conditions concerning scope, reduction plans and verification in relevant cases. From January 2026 it states that only emissions attributable to Spanish territory are registrable. An international corporate inventory may therefore need a specific boundary for that purpose; the two results should not be presented as identical. Registration also does not automatically establish the quality of the underlying preventive service.
Indicators and responsible communication
An absolute result can be accompanied by intensity measures, such as emissions per activity day or clearly defined service unit. The denominator should avoid misleading comparisons between services of different complexity. Falling intensity while total emissions rise are different findings that should be explained together.
Calculating, reducing and offsetting are not synonyms. Purchasing offsets does not physically remove emissions from the inventory and should be communicated separately under the applicable framework. Nor is “impact free” appropriate when only two scopes were measured. Communication should identify year, coverage, methodology and limitations without turning a label into a guarantee covering the whole value chain or proof of clinical and preventive quality.
Calculation and decision example
In a purely educational example, a centre consumes 10,000 kWh and uses a hypothetical factor of 0.20 kg of carbon dioxide equivalent per kWh. The result is 2,000 kg, or 2 tonnes, for that item. This factor represents no actual supplier or year and must not be reused in an inventory.
If the service compares route reorganisation with reducing technical visits, it should estimate both options and first establish which activities require attendance. It may group journeys while retaining preventive coverage, then measure real results and review service quality. The example demonstrates traceability and joint decision making; it neither promises a saving percentage nor documents a reduction already achieved.
Frequently asked questions
Does the footprint measure preventive quality?
No. It quantifies emissions within a boundary; service quality needs its own criteria.
Must every prevention service register?
Not merely because it provides prevention services. Applicable organisational obligations and conditions must be checked.
Is offsetting the same as reducing?
No. Offsets are communicated separately and do not remove physical emissions from the inventory.
Can visits be removed to reduce emissions?
Changes must preserve technical and healthcare suitability; environmental targets do not justify inadequate prevention.
