EPA told to study corporate supply-chain emissions—but no mandate to report
S. 3928 — SCOPE Act of 2026 · Filed by Adam Schiff (D-CA) · Introduced Feb 26, 2026 · Referred to committee
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What it does
This bill directs the EPA to study and publish guidance on how large polluting facilities should calculate and report their indirect greenhouse gas emissions (Scope 3 emissions)—emissions from their supply chains and product use, not just their own operations. The EPA will set reporting thresholds, calculation methods, and data quality standards within one year, but the bill does not mandate reporting itself, only recommends it.
Why we flagged it
The bill's core function is to mandate EPA research and guidance on Scope 3 emissions reporting—a transparency and standardization measure, not a regulatory mandate. It is procedural and informational, not a direct emissions cap or tax.
What the text implies
- The bill's real impact hinges on EPA's discretion to set thresholds and methodologies. A high threshold could render the guidance toothless; a low one could impose significant compliance costs on mid-size firms.
- Scope 3 emissions are notoriously difficult to measure and verify (they include supply-chain and consumer-use emissions). Guidance without mandatory reporting may create a patchwork of voluntary standards, reducing comparability.
The full analysis lists 4 implications of this text.
Who stands to gain
Environmental consulting firms (emissions accounting and verification services); Software vendors (emissions tracking and reporting platforms); Large corporations with complex supply chains (if EPA sets high thresholds, reducing reporting burde