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Maricopa County, AZ Single-Use Items: Polystyrene Foam Rules (2026)

Few Restrictions

Verified 2 weeks ago|Source: Arizona Revised Statutes section 9-500.38 →

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Key Facts

Preemption statute: ARS section 9-500.38
County foam ban: None for private use
County facilities: Voluntary procurement preference
Litter rules: MCESD environmental code

City-specific rules exist: Phoenix, and Mesa have their own polystyrene foam rules rules that differ from Maricopa County's county-level regulations. If you live in one of those cities, check the city-specific page instead.

Summary

ARS section 9-500.38 preempts Maricopa County from banning expanded polystyrene foam cups, plates, or clamshells. Restaurants and grocers may freely use EPS foam containers, and the county limits restrictions to its own facilities through procurement policy.

Full Breakdown

The 2015 Cooler Heads Prevail Act, ARS section 9-500.38, defines auxiliary containers broadly to include plastic foam food service ware, so Maricopa County cannot ban or tax expanded polystyrene cups, plates, bowls, trays, or clamshells used by private businesses. Restaurants, food trucks, and convenience stores may continue to offer EPS foam takeout countywide. Maricopa County government has adopted internal procurement preferences that steer county facilities and contractors toward recyclable and compostable food ware, but those rules do not bind private retailers. The county Climate and Sustainability efforts set voluntary reduction goals rather than mandates. State-shared revenue penalties under ARS section 41-194.01 keep the preemption sharp.

Violations & Fines

There is no private-business penalty for using EPS foam in Maricopa County. Improper disposal in county trash or stormwater can trigger MCESD solid-waste or litter fines under county environmental code.

Frequently Asked Questions

Can my Maricopa County restaurant use foam takeout clamshells?

Yes. ARS section 9-500.38 preempts any county ban on expanded polystyrene food service ware. The county may not require restaurants to switch to compostable containers.

Are foam coolers sold in Maricopa County stores legal?

Yes. Retail sale of foam coolers is unrestricted under state preemption. Buyers are encouraged to recycle through voluntary programs at participating retailers and waste haulers across the county.

How does Maricopa County compare?

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Maricopa County, AZ Single-Use Items: Polystyrene Foam Rules (2026)

Key Facts

Summary

Full Breakdown

Violations & Fines

Frequently Asked Questions

Sources & Official References

Related Maricopa County Ordinances

Parking Rules: Loading Zones

Parking Rules: Curb Color Rules

Fire Regulations: Smoke Detectors

Home Business: Home Occupation Permits

Short-Term Rentals: Night Caps

Rental Inspections: Lead-Hazard Inspections

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