There are industry-average EPDs and product-specific EPDs. The product-specific ones are for products produced by one manufacturer. The industry-average EPDs are for products produced by multiple manufacturers who all make the same product; it is an average of all their environmental impacts. They join together to provide data and support the creation of the industry-wide EPD. The type of EPD should be clearly stated on the document. Often an industry-wide EPD is released by a trade association, while a product-specific one is released by a single manufacturer.
Both types of EPD are accepted for LEED credit, but industry-wide EPDs count for fewer points toward your total.
How do you recognize each type of EPD?