ISO 14025: a guide to environmental product declarations (EPDs)

In a marketplace increasingly sensitive to environmental concerns, companies need robust ways to communicate product sustainability. ISO 14025, part of the ISO 14000 family, provides the principles and procedures for creating Type III environmental declarations, enabling businesses to present credible, transparent data about a product's life-cycle impacts.

This article examines how ISO 14025 works, its benefits for corporate sustainability and best practices for implementation.

What is ISO 14025?

ISO 14025 outlines the principles and procedures for developing Type III environmental declarations, also known as Environmental Product Declarations (EPDs). These declarations offer quantified environmental data (for example, carbon footprint, water use and waste generation), based on life cycle assessments (LCAs). Unlike marketing labels that may emphasise a single attribute, EPDs provide multi-criteria information, giving stakeholders a holistic view of a product's ecological impacts.

The current edition in force is ISO 14025:2006. ISO has a revision under development, expected to be published around 2026, but the principles described here remain the basis of every Type III declaration.

Core elements of ISO 14025

1. Transparency: ensures all data is presented in a clear, unbiased manner, including study boundaries, data sources and assumptions.
2. Comparability: follows standardised Product Category Rules (PCRs) to allow meaningful comparisons between similar products.
3. Life-cycle perspective: requires an LCA covering stages from raw material extraction to end-of-life disposal or recycling.
4. Verification: involves independent auditing to validate the accuracy and credibility of the data.

Why ISO 14025 matters for businesses

1. Market differentiation: products with an EPD can stand out in B2B and B2C markets where sustainability criteria influence buying decisions.
2. Regulatory compliance: some government procurement policies and green building standards (for example, LEED) increasingly favour products with third-party verified EPDs.
3. Risk management: a rigorous LCA reveals hotspots, the areas with the largest environmental impacts, guiding targeted improvements and risk mitigation.
4. Stakeholder trust: transparent declarations build credibility with investors, regulators and consumers seeking authentic sustainability.

Developing an environmental product declaration

1. Conduct a life cycle assessment

Follow ISO 14040 and ISO 14044 to gather data on energy use, raw materials, emissions and waste for each life-cycle stage. Define the scope (cradle-to-gate or cradle-to-grave) and the functional unit clearly.

2. Identify the relevant Product Category Rules (PCRs)

PCRs specify how to perform the LCA and what indicators to report, ensuring consistency across EPDs for similar product types (for example, concrete, textiles or packaging).

3. Compile the declaration

Present the quantitative results, including global warming potential, acidification potential, resource depletion and other environmental impacts defined by the PCR.

4. Verification and registration

Engage an accredited EPD programme operator to review and verify your EPD. After approval, the EPD is published in a registry, making it accessible to stakeholders.

Key metrics in an EPD

• Global warming potential (GWP): measured in CO₂ equivalents.
• Eutrophication potential: indicates nutrient runoff leading to algae blooms in water bodies.
• Ozone depletion potential: reflects emissions of ozone-depleting substances.
• Photochemical ozone creation potential (POCP): assesses smog-forming substances such as VOCs and NOx.
• Resource depletion: tracks the use of non-renewable resources, from fossil fuels to metals and minerals.

Sectors embracing ISO 14025

• Building and construction: EPDs are increasingly a requirement in LEED, BREEAM and other green building rating systems.
• Furniture and interiors: large procurement contracts often specify EPDs for office equipment and furnishings.
• Electronics: as technology companies race to reduce their carbon footprints, EPDs help communicate progress to consumers and regulators.
• Packaging: major retailers encourage suppliers to validate sustainable packaging claims through EPDs.

Challenges to implementation

1. Data collection: gathering reliable, up-to-date inputs across complex global supply chains can be time-consuming.
2. Cost and expertise: conducting an LCA and preparing an EPD requires specialised skills and sometimes significant financial investment.
3. Evolving standards: PCRs differ across regions, and new guidelines may emerge, requiring frequent updates.
4. Comparability limits: even with PCRs, variations in product functionality or performance can limit direct comparisons.

Best practices

1. Start small: pilot the EPD process with a flagship product or a key market segment to build internal expertise.
2. Use digital tools: employ LCA software such as Sphera LCA for Experts (formerly GaBi) or SimaPro to streamline data analysis and scenario testing.
3. Engage suppliers early: collaboration with upstream partners ensures accurate data on raw materials and transport.
4. Communicate the benefits: clearly explain to customers, investors and employees why EPDs matter and how they support continual improvement in sustainability.

Future outlook

As circular economy principles gain traction, EPDs may expand to include metrics on product durability, recyclability and recycled content. Digital innovations, such as blockchain, could also automate parts of the verification process, improving real-time transparency and trust.

Rising consumer awareness and government mandates suggest that EPDs, and the ISO 14025 framework underpinning them, will play an even larger role in shaping sustainable product markets.

ISO 14025: a standardised method for issuing EPDs

ISO 14025 gives companies a standardised method for issuing Environmental Product Declarations, showcasing verifiable, life-cycle data on a product's environmental impacts. This transparency not only meets regulatory and market demands but also drives internal improvements by identifying key areas for sustainability innovation. In an economy increasingly defined by climate awareness, ISO 14025 is a reliable benchmark for companies striving to excel in environmental stewardship.