Countdown

California SB 253 — First Scope 1+2 Emissions Reports

Monday, August 10, 2026 · 61 days away

United States Regulatoryscheduled

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Event overview

First mandatory disclosure of Scope 1 and Scope 2 greenhouse-gas emissions by US-domiciled companies with >$1B revenue doing business in California under SB 253 (Climate Corporate Data Accountability Act).

Date: 2026-08-10
Country / jurisdiction: US
Region: United States
Category: Regulatory
Status: scheduled

Confirmation checklist

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Date signal

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Local time

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Calendar action

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Next useful path

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Source trail

Source trail for California SB 253 — First Scope 1+2 Emissions Reports

Verify source

Primary source

calepa.ca.gov

Last reviewed

2026-04-30

Tracker status

scheduled

Date precision

Single-date event without a reliable public start time; date-first countdown only.

Schema posture

Event structured data is emitted because the record is single-date and scheduled or confirmed.

This is an expected date. Use reminders and monitoring, but verify the source before making travel, purchase, publication, or staffing decisions.

Primary citation

The current date signal points to calepa.ca.gov. The source URL is shown visibly on the page so readers can verify late changes instead of relying only on the timer.

Freshness and review

Source policy was reviewed on 2026-04-30. Live countdown values are render-time snapshots; editorial source fields update when the tracked event dataset changes.

Operational detail

The record does not carry a reliable public start time yet, so the page avoids implying a midnight or all-day start.

Weak-date handling

The page can support calendar actions and Event schema, while still telling readers to check the source for operational changes.

What this countdown tracks

The clock above counts down to the first mandatory disclosure deadline under California's SB 253, the Climate Corporate Data Accountability Act, on Monday, August 10, 2026. By this date, US-domiciled companies with more than $1 billion in global revenue that "do business in California" must publish their Scope 1 and Scope 2 greenhouse-gas emissions for fiscal year 2025, verified by an accredited third-party assurance provider at limited-assurance level.

About this regulation

SB 253 was signed by Governor Gavin Newsom on October 7, 2023 and amended by SB 219 in September 2024 to give CARB additional rulemaking flexibility on the deadline structure. The California Air Resources Board (CARB) is responsible for the implementing regulation, which was put out for public comment in late 2024 and finalized in 2025 after several stakeholder workshops. The law applies to roughly 5,400 companies based on California Department of Tax and Fee Administration (CDTFA) revenue thresholds and broad "doing business" criteria from the California Revenue and Taxation Code.

The disclosure regime is two-tiered. Scope 1 (direct emissions from owned operations) and Scope 2 (purchased electricity, steam, heating, cooling) reports begin in 2026 covering FY2025. Scope 3 (value-chain emissions) reports begin in 2027 covering FY2026. Reports must use the GHG Protocol as the foundational standard with CARB-specified accreditation for assurance providers. The law was upheld in federal court in early 2025 against a US Chamber of Commerce challenge alleging First Amendment violations; the appeal continues but did not block 2026 implementation.

What changes

By August 10, 2026:

Filings published on a publicly searchable registry maintained by CARB or a designated reporting body.
Scope 1 and 2 in metric tons CO2e, with limited assurance.
Penalties up to $500,000 per reporting year for non-filing; reasonable-best-efforts safe harbor for first cycle.
Scope 3 reporting begins in 2027 and ramps up to "reasonable assurance" by 2030.
Methodology: must use the GHG Protocol Corporate Standard.

Past milestones

March 2025: CARB final implementing regulation adopted.
October 2024: Governor Newsom signs SB 219 amending implementation timelines.
October 2023: Newsom signs SB 253 (and the companion SB 261 climate-related financial-risk law).
January 2024: California Chamber of Commerce files First Amendment challenge in federal court.
January 2025: District court denies preliminary injunction.

How to follow

Official rulemaking docs at ww2.arb.ca.gov/rulemaking, with the SB 253 / SB 261 docket on the CARB Public Documents portal. Industry tracking from PwC, Deloitte, KPMG, EY, and the Sustainable Business Council of California. Coverage from Bloomberg Green, Reuters Sustainable Business, and the LA Times Climate.

Pair this with peer disclosure-regime pages: CSRD Wave 2 first reporting 2028, EU EUDR application 2026, EU CRA application 2027, GDPR 10-year evaluation 2028, and EU CBAM first certificate surrender 2026.

FAQ

When are the first SB 253 reports due? Monday, August 10, 2026, covering FY2025 Scope 1 and Scope 2 emissions. Where does the law apply? Companies "doing business in California" with global revenue over $1B — applying broadly to US Fortune 1000 companies. Why does SB 253 matter? It is the first US jurisdiction to impose mandatory, verified Scope 1+2 (and later Scope 3) emissions disclosure on private companies, complementing the SEC climate-disclosure rule paused in 2024. Does it apply to non-US companies? Yes, if they are doing business in California and meet the revenue threshold, regardless of state of incorporation.

Date confidence

Scheduled date

California SB 253 — First Scope 1+2 Emissions Reports is tracked as a scheduled event. The date is suitable for countdown and calendar use, while final logistics should still be checked against the linked source.

Source

https://www.calepa.ca.gov/

Source host: calepa.ca.gov
Date precision: Single scheduled date from the linked source
Schema posture: Event startDate emitted because the record is single-date and scheduled/confirmed
Planning boundary: Use as a monitoring aid until the source trail is stronger

Structured data posture

This page emits Event structured data because the tracked record has a single scheduled or confirmed date. The linked source remains the final reference for time, venue, and operational changes.

Countdown evidence

Retention class

Date-first scheduled countdown

Evidence score

5/10 record signals

City-page readiness

Held to date-first

Evidence score5/10 signals present: primary source URL; tracked date; schema-safe date; place context; related event cluster
Date and schemaSchema-safe single date: Single-date event without a reliable public start time; date-first countdown only. Event structured data is emitted because the record is single-date and scheduled or confirmed.
Local-time readinessDate-first only: The record is not used as a city-local event page until it has a reliable time, timezone, and non-windowed date.
Record completeness1 concrete fields: country US
Weak-field watchlist4 fields to improve: verified public start time; venue; manual official-source note; historical sequence
Source freshnesscalepa.ca.gov; reviewed 2026-04-30: Related crawl path: Taylor Swift–Travis Kelce Wedding (Rumoured), EU AI Act — High-Risk & GPAI Enforcement Begins, EU AI Act GPAI Rules Go Live, EU AI Act — GPAI Penalties Begin.

Planning notes

How to use this California SB 253 — First Scope 1+2 Emissions Reports countdown

Countdown pages are useful when they are honest about what is known, what is merely expected, and what still needs checking. This page keeps the live timer separate from the source confidence and structured-data posture.

Date confidence

California SB 253 — First Scope 1+2 Emissions Reports is tracked as scheduled for Monday, August 10, 2026; the countdown can support reminders while final logistics still belong to calepa.ca.gov. The page can emit precise Event structured data because the tracked record has a single scheduled or confirmed date.

What could change

Watch for date shifts, venue or access updates, broadcast windows, registration rules, and source corrections. The current precision is: Single-date event without a reliable public start time; date-first countdown only..

Local-time usefulness

No reliable source start time is attached yet, so the page stays date-first and avoids implying a midnight start. 61 days remain at render time.

Category context

California SB 253 — First Scope 1+2 Emissions Reports sits in Regulatory with country US. Related countdown links should help users compare similar events, not create unverified event-city pages.

Catalog-specific details

No creator, platform, league, brand, fixture, family, or alternate-name detail is attached to this event record.

Series and expectation notes

No series history, end date, or what-to-expect field is attached.

Priority note

This page is kept specific through source confidence, category, region, date precision, and update notes rather than generic countdown filler.

Verification trail

source URL https://www.calepa.ca.gov/. trust checks: Source host: calepa.ca.gov, Date precision: Single scheduled date from the linked source, Schema posture: Event startDate emitted because the record is single-date and scheduled/confirmed, and Planning boundary: Use as a monitoring aid until the source trail is stronger. no manual editorial context is attached yet.

Record completeness

present fields: country US. missing or weak fields: verified public start time, venue, manual official-source note, and historical sequence

Related crawl path

Nearby retained events: Taylor Swift–Travis Kelce Wedding (Rumoured), EU AI Act — High-Risk & GPAI Enforcement Begins, EU AI Act GPAI Rules Go Live, EU AI Act — GPAI Penalties Begin, and AARO UAP Historical Record Report Vol. II. These links should support topical discovery without creating unverified event-city pages.

Review boundary: this page tracks the public date signal, source link, category, region, and calendar posture. It does not replace official ticketing, exchange, broadcaster, organizer, court, regulator, or government notices.

Source reviewed Apr 30, 2026. The countdown record is intentionally labeled as scheduled or expected; use the source link and any range notes before treating the date as final.

Live values rendered at Jun 6, 5:46 AM UTC.

Related planning pages

Countdown hubAll currently tracked countdowns.Regulatory countdownsRelated events in this category.2026 countdownsEvents tracked for the same calendar year.United States countdownsRegion-specific countdown pages.SourcesHow we cite and review date sources.Speculative datesHow expected and windowed dates are labeled.

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