Food factories use a lot of water, run on a lot of energy, and create a lot of waste. These three resources are also where sustainability claims are most often tested, because they can be measured with meters, bills and weighbridge records.
For food manufacturers, getting these numbers right is no longer optional. Bursa Malaysia lists energy, water and waste management among the common sustainability matters for listed companies. Customers and lenders increasingly ask for the same data. And the numbers usually point straight to cost savings.
This guide explains which metrics to track for each area, how to present them, and the mistakes to avoid.
Key Takeaways
- Water, energy and waste are the most measurable and most comparable sustainability metrics in food manufacturing.
- Report both absolute totals and intensity (per tonne of product) to show real efficiency.
- Bursa Malaysia’s framework asks for three financial years of data for each indicator.
- Good data starts with sub-metering and consistent waste categories.
Why these three metrics?
Water, energy and waste connect directly to a food plant’s core processes: cleaning, cooking, cooling, drying and packing. They are also closely linked. Heating water uses energy. Wastewater treatment uses energy. Organic waste can become energy through biogas.
They matter for compliance too. Bursa Malaysia’s enhanced sustainability reporting framework sets 11 common sustainability matters for Main Market listed companies, including energy management, water management, waste management and emissions management. Companies must report data for each indicator across three financial years (Bursa Malaysia).
Under the Securities Commission’s National Sustainability Reporting Framework, listed issuers and large non-listed companies are also moving in phases to ISSB-based disclosures between 2025 and 2027 (Securities Commission Malaysia, 2024). Energy data feeds straight into the emissions figures those standards require.
Metric 1: Water
Food manufacturing depends on clean water for ingredients, cleaning-in-place, cooling and steam. Water is also a local risk: supply disruptions and rising tariffs affect operations directly.
What to report:
- Total water withdrawn (megalitres), split by source: municipal supply, groundwater, surface water, rainwater.
- Water intensity: cubic metres per tonne of finished product.
- Wastewater discharged and its treatment level, with compliance against Department of Environment discharge limits.
- Water recycled or reused, as a volume and a share of total use.
Where savings usually hide: cleaning cycles, cooling tower losses, leaks and condensate that is not returned to boilers.
Metric 2: Energy
Energy is often the largest environmental cost in a food plant, and the main source of Scope 1 and Scope 2 emissions.
What to report:
- Total energy consumed (megawatt-hours or gigajoules), split by electricity, natural gas, diesel, LPG and biomass.
- Energy intensity: MWh or GJ per tonne of product.
- Renewable share: on-site solar, green electricity tariffs, or certified renewable energy purchases.
- Linked emissions: Scope 1 from fuel burned on site, Scope 2 from purchased electricity.
Where savings usually hide: boilers and steam systems, refrigeration, compressed air leaks, and motors running without variable speed drives. Rooftop solar is now a common first step for Malaysian plants with large roof areas.
Metric 3: Waste
Waste is the most visible metric and often the most poorly measured. Many plants know what they pay for disposal but not what the waste actually is.
What to report:
- Total waste generated (tonnes), split into hazardous and non-hazardous.
- Waste by destination: reused, recycled, composted, sent to feed, recovered as energy, or landfilled.
- Waste diverted from disposal as a percentage of total.
- Food loss and waste, reported separately from packaging waste.
- Scheduled waste handled under the Environmental Quality (Scheduled Wastes) Regulations.
Why diversion matters: a plant that sends 70% of its waste to animal feed and compost tells a very different story from one that landfills the same tonnage, even if total waste is equal.
Absolute vs intensity: report both
Absolute figures show your total impact. Intensity figures show efficiency. Each can mislead on its own.
If production grows 20%, total water use will probably rise even if the plant becomes more efficient. Intensity (water per tonne of product) shows whether each unit is getting cheaper to make in resource terms. If production falls, absolute use may drop while efficiency worsens.
A simple reporting table for each metric looks like this:
| Indicator | FY2024 | FY2025 | FY2026 | Target |
|---|---|---|---|---|
| Total water withdrawn (ML) | ||||
| Water intensity (m³/tonne) | ||||
| Total energy (MWh) | ||||
| Energy intensity (MWh/tonne) | ||||
| Total waste (tonnes) | ||||
| Waste diverted from disposal (%) |
Three years of data, a clear unit and a target: that is what readers and regulators look for.
What good reporting looks like in practice
Strong reports connect the numbers to actions and targets. Ajinomoto Malaysia’s approach to responsible food manufacturing in Malaysia, for example, sets out water efficiency and wastewater treatment as priorities, reports food waste tonnages at its facilities, and pairs them with a target to cut food waste by 75% by 2031. It also reports on packaging changes, such as moving from plastic pallets to paper slip-sheets.
The pattern is useful for any manufacturer: state the metric, show the number, explain the action, set the target.
Common mistakes to avoid
- Estimating from bills only. Utility bills give totals but not where the resource is used. Sub-meter major lines and utilities.
- Inconsistent boundaries. Include every site and warehouse you control, or state clearly what is excluded.
- Changing units year to year. Pick units and keep them.
- Mixing food waste and packaging. They have different causes and solutions.
- No baseline. Without a base year, targets and progress cannot be judged.
- Reporting without context. Explain big changes, such as a new line, a plant closure or a change in method.
How to get started
- Set the boundary. Decide which sites and activities are included.
- Collect 12 months of data. Use bills, meter readings and waste contractor records.
- Install sub-meters on the biggest users: boilers, chillers, CIP systems and wastewater plants.
- Standardise waste categories with your contractors so every tonne has a destination.
- Calculate intensity using a consistent production figure.
- Set targets for each metric, with a base year.
Conclusion
Water, energy and waste are the metrics every food manufacturer can measure, and the ones stakeholders expect to see first.
- Track absolute totals and intensity side by side.
- Report three years of data with consistent units.
- Link every number to an action and a target.
Done well, these three metrics give a clear picture of how efficiently a plant turns resources into food, and where the next savings will come from.