What Producers Need to Know Right Now
If your company sells products in California, you've likely heard about California's Extended Producer Responsibility (EPR) law. But while most conversations focus on recycling rates and producer fees, there's a separate, equally important requirement with imminent deadlines: Source Reduction.
This guide breaks down what source reduction means in California, what's required of your company, what you need to do right now, and how rePurpose can help, even while the regulations are still being finalized.
What Is Source Reduction Under California's EPR Law?
Source reduction is the requirement to reduce plastic at the source, before it ever becomes waste. Under California's EPR law (SB 54), producers are required not just to fund recycling infrastructure, but to actively reduce the amount of plastic packaging they put into the market in the first place by 25% by 2032 collectively as a producer community.
Noncomplying producers could face up to $50,000 in penalty per day. CAA will publish a bonus / malus schedule on May 1st, 2026 (tentative).
This is a fundamentally different ask from traditional EPR. It requires producers to change their packaging, not just pay into a system. And critically, it introduces binding targets, formal plans, and annual reporting obligations that apply to every covered producer.
The first milestone: a 10% plastic reduction by January 2027, measured against your 2023 packaging baseline.
California’s Targets At A Glance
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How Is Source Reduction Measured in California?
What Are the Approved Source Reduction Pathways?
Every source reduction action must be attributed to one of five approved pathways. Here's what each one means in practice:
Can Post-Consumer Recycled (PCR) Content Count Toward Source Reduction?
Yes, PCR is listed as an alternative compliance pathway, meaning it can help you meet source reduction targets. But there are important conditions:
- Third-party certification required: PCR must be certified through the Association of Plastic Recyclers (APR) PCR Certification Program.
- Only incremental PCR counts: If you were already using PCR in 2023, that's baked into your baseline. Only additional PCR above your 2023 level earns credit.
- PCR is considered a near-term "low-hanging fruit" by CAA, and producers are actively encouraged to incorporate it to meet early milestones.
What Is My Source Reduction Target?
Source reduction targets are based on 2023 data – not relative source reduction, but actual source reduction. This makes early action especially important for growing brands. California uses two metrics to track source reduction progress. Both must be met simultaneously. You cannot reduce plastic weight while increasing component count and still be compliant.
The Two Core Metrics
- Plastic Material Weight: The total weight of plastic in your packaging, measured against your 2023 baseline.
- Number of Components: The count of individual plastic packaging components, also measured versus 2023 levels.
Net Source Reduction is a Key Compliance Metric
1. Net Source Reduction (The Actual Reduction - compared to 2023 Baseline)
What it is:
The actual reduction in total plastic supplied into California compared to 2023 — with no adjustments for sales growth.
What it’s for:
This is the state’s primary measurement of progress. It shows whether less plastic is entering the California market than in 2023.
2. Source Reduction Activity (The Effort)
What it is:
All actions a producer takes to reduce plastic — such as redesign, elimination, reuse conversion, or material changes. This is a CAA metric to track the reductions, even if sales growth nullifies the actual target.
What it’s for:
This is a reporting metric. It documents the producer’s efforts and is included in:
- The Initial Source Reduction (ISR) Plan
- The Annual Source Reduction Report
This is the activity tracking, not the compliance outcome.
What Are Producers Required to Submit — and When?
There are three distinct deliverables producers are responsible for, each with different deadlines. It's important to understand how they differ from one another.
What Is an Individual Source Reduction (ISR) Plan?
Every producer must develop a formal, written plan detailing how they will achieve their source reduction targets. The plan must include enforceable agreements with the CAA, meaning producers are legally committing to how they'll hit their targets.
ISR Plan: Key Facts
- Deadline: No later than August 1, 2026 (exact date TBD pending finalized regulations)
- Reviewed individually: CAA will review each producer's plan separately
- Binding agreements: Plans become enforceable commitments with CAA
- Historical reductions (2013–2022): You can claim credit for actions taken before the baseline year, but these must be backed by solid data and evidence. Without documentation, they count as zero.
What Is the Annual Source Reduction Report?
Separate from the ISR Plan, producers must submit an Annual Source Reduction Report every year. This is essentially a progress report tracking actual source reduction activity across each pathway (lightweighting, bulking, right-sizing, etc.) against the forecasts mentioned in the source reduction plan.
Annual Source Reduction Report: Key Facts
- First due date: May 31, 2026 (covering 2025 data)
- Ongoing: Required every year thereafter
- Unusual timing this year: The first annual report deadline comes before the ISR Plan itself this year.
- Covers: 2025 supply data and source reduction pathway activity and continues annually
What Are the Key Deadlines Producers Should Know?
The regulations are still being finalized, which creates uncertainty, but also creates a narrow window to get your baseline data right. Here's the full timeline:
Why Does the 2023 Baseline Matter So Much?
Preceding the Annual Source Reduction Report and Individual Source Reduction Plan deadlines is the 2023 baseline report. Everything in California EPR source reduction is measured against your 2023 packaging baseline. Getting this right and getting it submitted correctly is arguably the single most important task you have right now.
The Baseline Window Is Short and Final
Producers will have a 30-day re-submission window in approximately April 2026 to correct their 2023 baseline reports. Once that window closes, you are permanently locked into those numbers.
Start preparing your baseline data / corrections now. A 30-day window is extremely tight for a complex, multi-SKU business.
What Happens with De-minimis Exemptions?
Some materials may eventually qualify for de-minimis exemptions (exclusions from reporting due to minimal environmental impact). However, these exemptions will NOT be finalized before the 2023 baseline re-submission or before ISR Plans are due.
What this means for you: report everything, assuming no exemptions exist. You will need to monitor regulations and adjust later if any exemptions are approved.
What Are the Penalties for Not Meeting Source Reduction Targets?
California is developing a "bonus/malus" mechanism for source reduction: a carrot-and-stick approach where producers who exceed their targets earn financial benefits, while those who fall short face penalties.
Bonus/Malus System: What We Know
- Publication date: CAA will publish the Bonus/Malus schedule on May 1, 2026.
- Maximum penalty: The statute allows for up to $50,000 per producer per day for failing to meet source reduction targets.
- Fee details: Illustrative base fees and estimated incentive ranges will also be released May 1, 2026.
Needs assessment dependency: Many fee determinations depend on CalRecycle's needs assessment data, which has not yet been released
Why Is California's Source Reduction Requirement More Complex Than Other States?
Even for experienced compliance teams, California's source reduction requirements introduce layers of complexity that set it apart from other EPR programs:
- All materials are included by default. Unlike some states, California covers all packaging materials unless a specific exemption is approved. There are no blanket carve-outs.
- Multiple calculation methods. Different equations apply depending on whether your reduction comes from a packaging change, a sales reduction, or a switch to reuse/refill. Managing this at scale across large SKU portfolios is complex.
- Reporting before planning. The Annual Source Reduction Report (due May 2026) is required before the ISR Plan (due August 2026).
- No sales growth relief. If your business grows, your absolute plastic footprint grows with it, and your reduction target does not adjust accordingly.
- Historical credits require ironclad documentation. Packaging changes made between 2013 and 2022 can count toward your baseline narrative, but only if you have clean, verifiable data. Estimates won't cut it.
What Should Producers Do Right Now to Prepare?
Given how quickly these deadlines are approaching, and how little room for error exists, here's where to focus your energy:
Immediate Action Checklist
1. Audit and finalize your 2023 baseline data. The April 2026 submission / re-submission window is short and high-stakes. Start now.
2. Incorporate PCR where possible. It's the most accessible near-term pathway for meeting early milestones.
3. Map your packaging changes to pathways. Begin categorizing any changes made since 2023 (or planned) against the five approved pathways.
4. Prepare for Annual Reporting. The May 31, 2026 report requires 2025 supply and source reduction pathway data — start tracking this now.
5. Monitor CAA guidance on ISR Plan development. Detailed guidance and a reporting workbook have been published. Stay current via the producer portal.
6. Don't wait to register. Delayed registration doesn't eliminate obligations. Producers who wait will face full historical back-reporting and back-pay when they eventually comply.
Need help checking off this list? rePurpose can guide you every step of the way. Our platform, along with our experienced compliance experts, helps you stay ahead of regulatory updates and deadlines (including reporting your 2023 baseline report), centralize and validate your packaging data, and generate accurate, audit-ready reports.
And with the CAA Individual Source Reduction Plan due no later than August 1st, rePurpose can help you build the source reduction strategy needed to create your plan and stay compliant with confidence.
The Bottom Line
California's plastic source reduction requirements are among the most demanding packaging regulations in the United States, and the regulations aren't even fully finalized yet. The combination of binding plans, annual reporting, tight baseline requirements, limited submission windows, and no adjustment for sales growth in terms of plastic reduction means that doing nothing is not a choice.
The producers who will navigate this most successfully are those who start their data preparation early, engage proactively with the ISR Plan process, and treat source reduction as an accelerator for packaging innovation.
Questions about your California EPR obligations? Reach out to our team for support with baseline data preparation, source reduction planning, and annual reporting.
This guide reflects information available as of March 2026. California's EPR regulations are still being finalized. Guidance, deadlines, and requirements are subject to change. Monitor CAA and CalRecycle communications for updates.
