The Buy Clean Lesson: In the US, It Was Procurement That Made EPDs Mandatory

What ignited EPD numbers in America was not an environmental campaign; it was a tender rule. California’s Buy Clean act put two conditions on materials used in publicly funded projects: submit an EPD and keep your GWP under the cap. Since then, in the US, “EPD” has been the language of qualifying for tenders, not of producer marketing. This article summarises how the model works — from the primary source — and what it means for our side of the ocean.

How the model works

The Buy Clean California Act (AB 262; Public Contract Code 3500-3505) is administered by the state’s Department of General Services (DGS) and the Air Resources Board (CARB). The design has three parts:

• Scope: four material groups — structural steel, concrete reinforcing steel, flat glass and mineral wool insulation. It applies to public works contracts awarded on or after 1 July 2022.
• The document condition: the manufacturer must submit a facility-specific EPD independently verified to ISO 14025. Industry-average EPDs are not accepted — an average binds no one’s actual performance. Expired EPDs are rejected.
• The limit condition: the product’s GWP may not exceed the cap DGS publishes per material. The current limits took effect on 1 January 2025, and DGS reviews them every three years, with the option to tighten.

That last item is the system’s engine: the bar is not fixed — it descends. A producer under the limit today can fall out of tenders in the next cycle without improving data and process. The EPD stops being a reporting artefact and becomes a competitive instrument.

Why it worked

Because it attached demand to the right place. In voluntary schemes an EPD comes out of the marketing budget and sits at the bottom of the priority list. Under Buy Clean, without an EPD you cannot bid — the document becomes a precondition of the sales process. The producer’s question shifts from “should we get an EPD?” to “where is our GWP against the limit?” — and that pulls investment into data quality all by itself.

What it tells us

The same mechanism is arriving here under different names:

• In the EU: the new Construction Products Regulation has tied environmental sustainability to a verification system for all product families; environmental criteria entering green public procurement specifications is part of the same direction. CBAM already does the border version: no data means a high default value.
• For producers: “do you have an EPD, what is your product’s GWP?” is now a question for the sales team, not the sustainability department. The only way to be ready the day a GWP cap appears in a specification is to hold facility-specific, verified data before that day comes.

A verifier’s note: the most instructive part of Buy Clean is the “facility-specific” condition. The era of hiding behind the industry average is closing — closed in the US, closing in the EU. If you cannot speak with your own data, the average speaks for you; and the average usually speaks against you.

Source: California DGS — Buy Clean California Act (PCC 3500-3505; scope, facility-specific EPD condition, the 1 July 2022 and 1 January 2025 dates, the three-year review). Similar programmes are spreading across other US states and at federal level; this article uses the California model as the verified example.