How to Collect Data for your Carbon Footprint

Struggling to collect data for your carbon footprint? You’re not alone. One of the biggest challenges organisations face when measuring their carbon footprint is knowing where to start with data collection. What data do you need? Where do you find it? How do you ensure accuracy? Without clear guidance, the process can feel overwhelming.

How to collect the right data

Identify key data sources

Start by mapping out all activities in your organisation contributing to carbon emissions. Key areas to focus on include water usage (extraction, consumption, wastewater treatment), supply chain operations (purchased goods and services), waste management (recycling, landfill waste), business travel (flights, car mileage, public transport), and energy consumption (electricity, gas, fuel use). The more comprehensive your data collection, the more accurate your carbon footprint assessment will be.

Engage stakeholders

Data collection is a team effort. Work with departments such as facilities management, procurement, HR, and finance to gather relevant data. These teams hold key information like procurement records, travel logs, and utility bills. Collaboration ensures that all necessary data points are captured for a complete analysis.

Set timeframes for data collection

Decide on a reporting period — typically annual data collection is recommended to track progress over time. Consider collecting data monthly or quarterly to reduce year-end workload. Align data collection across all departments for consistency.

Ensure data accuracy

Reliable data leads to meaningful insights. Verify calculations and correct any inconsistencies. Cross-check data with original documents (invoices, utility bills, travel records). Document your process: sources used, assumptions made, and how data was collected. Proper documentation helps with audits, future reporting, and refining your data collection process.

The difference between activity-based and spend-based data

Activity data measures direct resource use (e.g. kWh of electricity used, miles travelled, tonnes of waste produced) and provides the most accurate footprint calculation. It enables informed emission reduction strategies. Spend data estimates emissions based on financial expenditure (e.g. the amount spent on fuel, business travel, or electricity). It is useful when activity data is unavailable but less accurate due to price fluctuations. Best practice: prioritise activity data for the most precise footprint calculation and use spend data only when necessary.

Common challenges and how to overcome them

Struggling to find the right data? Establish standardised templates and processes for data collection across your organisation. Consider implementing a centralised data management system that all departments can access. Concerned about data accuracy? Regularly audit data collection methods, automate processes where possible, and collaborate with suppliers to improve data accuracy. Lack the time or resources? Align carbon accounting with financial reporting cycles and integrate data collection into existing workflows.

Collecting carbon data doesn’t have to be complicated. Compare Your Footprint’s Data Helper Tool guides you through every step, helping you identify what data you need, learn the best collection methods, and improve data quality for more reliable carbon accounting.