Polystyrene Foam Rules in San Mateo, CA (2026)

California state rule: San Mateo does not have a local ordinance for polystyrene foam rules. This topic is governed by California state law and applies uniformly across the state.

Summary

California restricts expanded polystyrene food containers statewide through SB 54 (2022) packaging requirements under Public Resources Code 42040-42081. The law mandates that polystyrene foodware achieve 25 percent recycling by 2025 or face statewide sales prohibition.

Full Breakdown

SB 54 (Plastic Pollution Prevention and Packaging Producer Responsibility Act, 2022) codified at Public Resources Code 42040-42081 requires producers to ensure all single-use packaging and plastic foodware is recyclable or compostable by 2032. Expanded polystyrene foodware is prohibited from sale unless producers demonstrate at least 25 percent recycling rate by January 2025, escalating to 65 percent by 2032. CalRecycle certified that polystyrene failed to meet the 25 percent threshold, triggering the statewide ban. Local governments may impose stricter rules but cannot authorize prohibited products.

Violations & Fines

Producers face civil penalties up to $50,000 per day per violation under Public Resources Code 42081 enforced by CalRecycle and the Attorney General.

Frequently Asked Questions

Is expanded polystyrene foodware banned in California?

Yes. SB 54 prohibits sale of expanded polystyrene foodware because it failed to achieve the 25 percent recycling rate by January 2025 required under Public Resources Code 42040-42081.

Can California cities still pass their own foam bans?

Yes. Many cities have stricter local foam bans, and they remain valid. State law sets a floor that cities can exceed but not undermine.

How does San Mateo compare?

See how San Mateo's polystyrene foam rules rules stack up against other locations.

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San Mateo, CA Single-Use Items: Polystyrene Foam Rules (2026)

Key Facts

Summary

Full Breakdown

Violations & Fines

Frequently Asked Questions

Sources & Official References

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