California’s SB 253 is reshaping corporate climate reporting by making carbon emissions data subject to financial-level scrutiny. The law requires companies earning over $1 billion and operating in California to disclose Scope 1, 2, and 3 emissions with third-party assurance, pushing CFOs to treat sustainability data like audited financial records.
The regulation is also exposing major gaps in corporate data systems, especially around Scope 3 emissions tied to supply chains and logistics. Experts say businesses relying on spreadsheets and fragmented ESG reporting tools may struggle to meet new compliance standards as investors and regulators demand more transparent and defensible climate disclosures.