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SB 54 covered material categories, explained
Covered material categories (CMCs) are the groups SB 54 uses to sort packaging and food service ware by material, so that reporting and fees can follow what each item is made of. CalRecycle publishes the current category list, so check it before you classify a component.
This guide explains what CMCs are, why the right one matters and how to classify a component with confidence. It is part of our California SB 54 guide.
What is a covered material category?
A covered material category is a group of materials that SB 54 treats alike. Instead of reporting every product on its own, producers report packaging by category. That is how the law can set rules, targets and fees across thousands of different products.
We do not reproduce the list here. It can change, and CalRecycle is the authority on it. Start from CalRecycle’s SB 54 packaging EPR page and check for current requirements.
How do CMCs group materials?
Categories group materials that are alike, so a component usually lands in a category based on what it is made of. The difficulty is that real components are not always one material. A tray can have a coating, a pouch can have several layers and a cap can combine plastics.
When a component mixes materials or carries a coating, the category is not always obvious from the material name alone. That is why you need more than a one-word description from the supplier.
Why does the right category matter?
The category links your data to the rules. Two reasons stand out:
- Reporting. Your reports are organized by material, so a component in the wrong category produces a wrong line in the report.
- Fees. CAA sets SB 54 fees, and they are based on material and recyclability. Fees are scheduled to begin in 2027. See SB 54 fees: what to expect from 2027.
Oregon’s per-pound fees show how much category choice can matter. In Oregon’s 2026 rates, uncoated paperboard is 8 cents per pound and plastic-coated paperboard is 48 cents per pound. That is an Oregon example, not California rates, but it shows why one line about a coating in a supplier spec is worth getting right.
How do you classify a packaging component?
- Get the exact material from the supplier, in writing.
- Ask about any coating, laminate or added layer, and what it is made of.
- If the component has more than one material, record each material and its weight.
- Check the material against CalRecycle’s current category list.
- If it still does not fit, ask CAA or CalRecycle before you guess, and write down the answer.
What classification pitfalls should you avoid?
- Going by the visible material. A carton looks like paper, but a plastic coating on the inside is part of the answer.
- Trusting marketing names. Words like “eco” or “barrier” describe a purpose, not a material.
- Copying last year’s category. If the supplier changed the material or the category list was updated, the old answer may no longer hold.
- Merging parts. A cap and its liner are different materials, so one line for both hides information.
How often should you recheck categories?
Recheck whenever a supplier changes a material or a coating, and before each reporting cycle. Definitions and lists can be updated, so check CalRecycle for current requirements each time and note the date you checked next to the category you chose.
What should you ask suppliers so the category is clear?
Most category problems start with a vague spec. These follow-up questions turn common vague answers into usable ones.
| What the spec says | What to ask next |
|---|---|
| “Plastic film” | Which polymer is it, and how many layers does the film have? |
| “Paperboard” | Is there a coating or laminate, and what is it made of? |
| “Barrier” or “eco” packaging | What is the actual material, and which layer provides the barrier? |
| One weight for a multi-part component | What does each material weigh on its own? |
| No material listed | Please send the spec sheet or declaration for this component. |
Where is the official category list?
CalRecycle publishes it. Use CalRecycle’s SB 54 page as your starting point, and check it again before each reporting cycle, because categories and definitions can be updated.
Related guides
- SB 54 supply report: what data you need from each supplier
- California SB 54 explained: a plain-English guide for brands
- SB 54 fees: what to expect from 2027
Sources
- CalRecycle: SB 54 packaging EPR program
- Circular Action Alliance: California program page
- SB 54 statute text (Plastic Pollution Prevention and Packaging Producer Responsibility Act)
- CAA Oregon 2026 producer fee schedule (Internet Archive copy)
Last updated: November 2026
This guide is general information, not legal advice. Confirm current requirements with CalRecycle and CAA.