Why California’s New Climate Reporting Laws Matter: SB 253, SB 261, and SB 252

By: Nichole Fandino

California is once again leading the country. This time, the state is turning environmental goals into enforceable California climate reporting laws. Through Senate Bills 253, 261, and 252, California has taken a major step forward. Consequently, the state is now holding businesses accountable for their climate risks and emissions. Furthermore, these new rules aren’t just about basic regulation. Instead, they mark a massive shift in how we measure, report, and respond to corporate climate responsibility.

What Prompted These New California Climate Reporting Laws?

First, these requirements come after years of intense political debate. Lawmakers have worked closely with the California Air Resources Board (CARB) and other stakeholders to build this framework. Behind it is growing pressure from environmental groups and investors. They universally agree on one thing: voluntary climate reporting is simply no longer enough. Because climate change drives significant financial risk, the public deserves transparency. Therefore, they need a clear picture of each company’s role in the crisis.

Related: California’s 2026 Environmental Laws: What Manufacturers and Product-Based Businesses Need to Do Now

What the California Climate Reporting Laws Require

SB 253: The Climate Corporate Data Accountability Act

Specifically, this law requires large companies doing business in California to report their greenhouse gas emissions. This mandate includes direct emissions as well as indirect emissions from the entire value chain. Historically, these indirect emissions are the hardest to measure. Since we are now in 2026, the initial reporting phases for these requirements have officially begun. Additionally, independent third parties must verify this data.

SB 261: Climate Risk Disclosure

In addition, SB 261 pushes the boundaries even further. It requires large businesses to disclose exactly how climate change affects their operations and long-term strategy. Moreover, companies must detail the specific steps they are taking in response. These disclosures must follow well-established international standards, such as the Task Force on Climate-Related Financial Disclosures (TCFD).

SB 252: Fossil Fuel Divestment by Public Pensions

Conversely, SB 252 targets public investment rather than private companies. It directs CalPERS and CalSTRS—California’s major pension funds—to divest from fossil fuel holdings by 2030. Although it doesn’t impose new rules directly on businesses, it highlights a crucial financial trend. Ultimately, public investment is swiftly moving away from carbon-heavy industries.

What This Means for Businesses

Undoubtedly, these California climate reporting laws will reshape the broader business landscape. For companies already focused on sustainability, these rules help level the playing field. Meanwhile, smaller businesses may also feel a noticeable ripple effect. Larger corporations will inevitably start asking for emissions data from their smaller suppliers.

However, for the big businesses directly covered by these laws, the new workload is substantial. Tracking indirect emissions—known as Scope 3—is incredibly complex. Consequently, many companies must upgrade their systems and hire specialized consultants. Critics argue that the rules might create more paperwork than actual progress. Nevertheless, California’s position remains firm: climate risk is financial risk.

Related: California Idle Oil Wells: Environmental Risks and Regulations

What Comes Next

At the federal level, progress has been notably slower. The SEC has proposed its own climate disclosure rules. However, those federal rules remain in limbo due to ongoing political gridlock. If that federal delay continues, California’s rules will likely become the default national standard.

For covered companies, the deadlines are no longer in the distant future. Because it is 2026, the first reports are actively coming due. As a result, businesses are currently upgrading systems and lining up third-party verifiers. Still, significant gaps remain, especially regarding Scope 3 data collection.

Ultimately, businesses that wait run the risk of falling behind. These California climate reporting laws signal a strict new expectation. Companies must fully understand and disclose their climate risks to stay competitive today.

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