Understanding ISPM-15: What Every Exporter Needs to Know

ISPM-15 stands for International Standards for Phytosanitary Measures No. 15. It's a set of guidelines developed by the International Plant Protection Convention (IPPC) to prevent the spread of invasive insects and diseases through wood packaging materials used in international trade.

The regulation applies to all wood packaging materials — pallets, crates, dunnage, and any other solid wood used in shipping — that cross international borders. If your business exports products on wood pallets, those pallets must be ISPM-15 compliant. Non-compliant shipments can be refused entry, quarantined, or destroyed at the destination port, all at the shipper's expense.

Compliance requires that wood packaging materials be treated using an approved method. The most common method is heat treatment (HT), where the wood core temperature is raised to at least 56°C (133°F) for a minimum of 30 minutes. This kills any pests living in or on the wood. The other approved method is methyl bromide fumigation (MB), but this is being phased out in many countries due to environmental concerns.

Once treated, the pallet receives an official IPPC stamp — a mark that includes the country code, producer number, treatment code (HT or MB), and the IPPC symbol. This stamp is what customs officials look for when inspecting incoming shipments. Without it, your pallet is considered non-compliant.

At Bakersfield Pallet Co., our heat treatment facility is certified and inspected annually. We maintain detailed temperature logs for every batch, and each treated pallet receives our unique facility stamp. We can process both new and recycled pallets to ISPM-15 standards.

A few important things to keep in mind: The ISPM-15 stamp must be clearly visible on at least two opposite sides of the pallet. If a pallet is repaired after treatment, and the repair involves adding new untreated wood, the entire pallet must be re-treated. And the regulation applies even if the pallets are empty — so if you're returning empty pallets internationally, they still need to be compliant.

Common mistakes we see: Businesses assume that because their pallets were compliant when purchased, they'll remain compliant forever. But stamps can fade, especially on pallets stored outdoors. If customs can't read the stamp, they may treat the pallet as non-compliant. We recommend checking your stamps before every international shipment.

The cost of ISPM-15 treatment is relatively modest — typically $2-5 per pallet depending on volume. Compare that to the cost of having a container refused at port: storage fees, re-treatment costs, shipping delays, and potential loss of perishable goods. Prevention is far cheaper than the cure.

If you're not sure whether your current pallets are compliant, bring them to us. We can inspect, treat, and certify your pallets, usually within 24-48 hours. For businesses with regular international shipping needs, we offer standing treatment schedules to ensure you always have compliant inventory on hand.