Environmental Product Declarations (EPDs) are valuable tools for understanding a product’s environmental performance, but not all EPDs are created equal. To ensure the information is reliable and actionable, it’s essential to assess the quality and adherence to standards within the EPD.

Here’s a detailed guide on what to look for to evaluate the quality and standards of an EPD.

1. Reference Standards: The Foundation of a Reliable EPD

The reference standards used in an EPD are crucial for its credibility. These standards provide a consistent framework for calculating and reporting environmental impacts, ensuring that data from different EPDs is comparable.

What to Look For:

• ISO Standards: Look for mentions of ISO 14040/14044 (life cycle assessment), ISO 14025 (type III environmental declarations), and ISO 21930 (construction works).
• EN 15804: Commonly used in construction EPDs, this European standard ensures a standardized approach to reporting impacts across lifecycle stages.
• Consistency Across Products: Ensure the standards align with those commonly used in the product category you’re evaluating.

Why It Matters: Adherence to recognized standards ensures the methodology is robust and that the results can be trusted. Without these, comparing EPDs across products becomes unreliable.

2. Period of Validity: Ensuring Data is Up-to-Date

EPDs are based on current manufacturing processes, energy sources, and supply chain data, all of which can change over time. The period of validity ensures that the information remains relevant for a specific timeframe.

What to Look For:

• A clearly stated validity period, typically 5 years for third-party verified EPDs.
• Check whether the EPD has expired. If it has, the data may no longer accurately reflect the product’s environmental performance.

Why It Matters: Outdated EPDs may no longer align with the actual environmental impacts of the product, especially if production processes or materials have changed.

3. Verification: Third-Party Validation for Credibility

Third-party verification adds an extra layer of trust and ensures the EPD follows established guidelines and methodologies.

What to Look For:

• A clear statement indicating the EPD is third-party verified.
• The name of the verifier or certification body and details of their accreditation.
• A summary of the verification process to confirm transparency.

Why It Matters: Third-party verification ensures the data is not only accurate but also unbiased. It provides assurance that the EPD meets rigorous standards.

4. Environmental Data Summary: Focus on Key Impact Indicators

The environmental data summary is the heart of an EPD, presenting the product’s quantified environmental impacts.

Key Indicators to Focus On:

• GWP-total (Global Warming Potential, total): This is the most critical measure for carbon footprint, capturing emissions across the entire A1–A3 lifecycle.
• GWP-fossil: Provides a detailed breakdown of emissions from fossil fuel use.
• Other Indicators: Depending on your priorities, also review acidification potential (AP), eutrophication potential (EP), and ozone depletion potential (ODP).

Why It Matters: These metrics help you pinpoint areas where a product’s environmental performance stands out or falls short. Focusing on A1–A3 data allows you to assess impacts from raw materials, manufacturing, and transport—key areas where clients can often make improvements.

5. Declared Unit: The Basis for Fair Comparisons

The declared unit defines the scope of the environmental data presented. It’s a standard reference point that allows for meaningful comparisons between products.

What to Look For:

• Clearly stated declared unit (e.g., kilograms, cubic meters, or square meters).
• Ensure the unit matches your intended use or evaluation criteria.

Why It Matters: Without a consistent declared unit, comparing the environmental impacts of different products is like comparing apples to oranges.

6. LCA Background and Data Quality: Assessing the Reliability of the Analysis

The quality of the life cycle assessment (LCA) is a critical determinant of an EPD’s value.

What to Look For:

• A description of the LCA methodology, including system boundaries and assumptions.
• Details on the sources of data, such as primary data (from the manufacturer) versus secondary data (from databases).
• A discussion of data quality, including its age, geographic relevance, and representativeness.

Why It Matters: High-quality LCA data ensures that the EPD is based on accurate and relevant information, enhancing its reliability.

7. Lifecycle Modules Covered: Understanding the Scope

EPDs vary in the lifecycle stages they cover. Knowing the scope is essential to interpret the results properly.

What to Look For:

• A clear breakdown of the lifecycle modules included (e.g., A1–A3, A4, etc.).
• Ensure the modules covered align with the product’s intended application and your evaluation goals.

Why It Matters: An EPD covering A1–A3 provides insights into production impacts, while one including A4 or later stages helps assess transportation or end-of-life impacts.

8. Transparency and Accessibility

A good EPD is transparent and easy to understand, providing all necessary information without ambiguity.

What to Look For:

• Clearly structured sections (e.g., general information, lifecycle assessment, environmental data summary).
• Easy access to supporting details and explanations for complex data.

Why It Matters: Transparency ensures that you can fully understand and trust the data presented, enabling informed decision-making.