Canada supplies 36.6% of U.S. imports of Ash and Slag, Including Seaweed Ash (Kelp), across 15 countries (year to date through September 2026).
HHI 2,249 of 10,000 · HHI above 1,800. The sum of each country’s squared percentage share; one country with everything scores 10,000.
15 countries supplying this product to the U.S.
| Rank# | Country | Value | Share | YoY | Duty |
|---|---|---|---|---|---|
| 1 | Canada | $1.0M | 61.6% | +15.2% | 0.0% |
| 2 | Turkey | $253K | 15.2% | -40.5% | 12.5% |
| 3 | Netherlands | $213K | 12.8% | +460.3% | 1.0% |
| 4 | Poland | $108K | 6.5% | +85.0% | 10.0% |
| 5 | Mexico | $30K | 1.8% | -42.6% | 0.0% |
| 6 | Kazakhstan | $29K | 1.8% | +31.2% | 12.5% |
| 7 | France | $6K | 0.3% | +339.1% | 10.0% |
| 8 | Japan | -- | 0.0% | +194.4% | -- |
| 9 | New Caledonia | -- | 0.0% | +11.5% | -- |
| 10 | Finland | -- | 0.0% | -- | -- |
| 11 | South Africa | -- | 0.0% | +412.5% | -- |
| 12 | India | -- | 0.0% | -69.7% | -- |
| 13 | Pakistan | -- | 0.0% | -- | -- |
| 14 | Vietnam | -- | 0.0% | +465.6% | -- |
| 15 | China | -- | 0.0% | -28.2% | -- |
Duty is the duty Census calculated on this month's imports for consumption from each country, as a share of their customs value. It applies the rates in force, additional duties such as Section 301, 232 and IEEPA included and claimed trade-agreement preferences netted out, so it is an observed rate rather than a statutory one. It is an estimate, not duty collected: antidumping and countervailing duties, fees and later refunds are not in it. YoY compares year-to-date value with the same months last year.