Canada supplies 71.8% of U.S. imports of Heavy Water (Deuterium Oxide), across 9 countries (year to date through August 2026).
HHI 5,637 of 10,000 · HHI above 1,800. The sum of each country’s squared percentage share; one country with everything scores 10,000.
9 countries supplying this product to the U.S.
| Rank# | Country | Value | Share | YoY | Duty |
|---|---|---|---|---|---|
| 1 | Canada | $1.9M | 95.1% | -6.0% | 0.0% |
| 2 | Germany | $65K | 3.2% | +1285.2% | 10.0% |
| 3 | Israel | $22K | 1.1% | -86.1% | 12.5% |
| 4 | Switzerland | $12K | 0.6% | -23.8% | 12.5% |
| 5 | United Kingdom | -- | 0.0% | +3.8% | -- |
| 6 | Belgium | -- | 0.0% | -27.2% | -- |
| 7 | France | -- | 0.0% | -99.0% | -- |
| 8 | India | -- | 0.0% | -90.3% | -- |
| 9 | South Korea | -- | 0.0% | +1685.1% | -- |
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.