Import duty on Slag and ash n.e.c. in chapter 26; including seaweed ash (kelp) and ash and residues from the incineration of municipal waste (HS 2621)

Heading 2621 covers 2 tariff lines in LoadLoom's table; 2 of them clear duty-free under USMCA for goods made in Canada, the US or Mexico. Published US and Canadian rates below, verified October 2026. Pick the line that matches your goods for the worked example and border steps.

HS code	Goods	US duty	Canada duty	USMCA
2621.10	Slag and ash; ash and residues from the incineration of municipal waste	Free	Free	Free with certificate
2621.90	Slag and ash n.e.c. in chapter 26; including seaweed ash (kelp) but excluding ash and residues from the incineration of municipal waste	Free	Free	Free with certificate

This page is a free reference for shippers, not a customs ruling. Final classification and duty are determined by the licensed customs broker at entry, and government amounts are always billed at actual. Rates change with each tariff edition and trade action.

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Chapter 26: Ores, slag and ash · Every chapter