United States
1,060 plants, exporters and sites on record across 55 regions, grouped by the region each register publishes. Regional names are as the register writes them and are not translated.
| Region | On record | Localities |
|---|---|---|
| Washington | 251 | 13 |
| Massachusetts | 232 | 7 |
| United States | 88 | 17 |
| Alaska | 80 | 16 |
| California | 78 | 14 |
| Florida | 53 | 12 |
| Oregon | 48 | 10 |
| Maine | 30 | 7 |
| New Jersey | 24 | 10 |
| New York | 19 | 6 |
| Virginia | 14 | 7 |
| Rhode Island | 13 | — |
| Florida, United States | 8 | — |
| Louisiana | 8 | 3 |
| Georgia | 7 | 5 |
| Illinois | 7 | 4 |
| Texas | 7 | 4 |
| Michigan | 6 | 5 |
| Washington, United States | 6 | — |
| Wisconsin | 6 | 4 |
| Hawaii, United States | 5 | — |
| Missouri | 5 | 3 |
| South Carolina | 5 | 4 |
| Utah | 5 | 2 |
| MA | 4 | 2 |
| Minnesota | 4 | 3 |
| North Carolina | 4 | 3 |
| Alabama | 3 | 1 |
| New Hampshire | 3 | 1 |
| Ohio | 3 | 2 |
| Pennsylvania | 3 | 2 |
| Arkansas | 2 | 1 |
| Colorado | 2 | 1 |
| Connecticut | 2 | 2 |
| Delaware | 2 | 1 |
| Idaho | 2 | 1 |
| Maryland | 2 | 2 |
| WA | 2 | 2 |
| Alaska, United States | 1 | — |
| CA | 1 | 1 |
| California, United States | 1 | — |
| FL | 1 | 1 |
| Indiana | 1 | 1 |
| Kansas | 1 | 1 |
| LA | 1 | 1 |
| Louisiana, United States | 1 | — |
| ME | 1 | 1 |
| Mississippi | 1 | 1 |
| Nebraska | 1 | 1 |
| NJ | 1 | 1 |
| North Dakota | 1 | 1 |
| PA | 1 | 1 |
| South Dakota | 1 | 1 |
| Tennessee | 1 | 1 |
| Texas, United States | 1 | — |