| Basin | Number of records | First year sampled | Last year sampled |
|---|---|---|---|
| Whidbey Basin | 0 | ||
| San Juan Islands and Georgia Strait Basin | 55 | 2019 | 2019 |
| North Central Puget Sound Basin | 124 | 2022 | 2022 |
| South Puget Sound Basin | 0 | ||
| South Central Puget Sound Basin | 326 | 2019 | 2022 |
| Strait of Juan de Fuca Basin | 0 | ||
| Hood Canal Basin | 31 | 2019 | 2021 |
This is a representation of all Olympia Oysters records, after a basic data cleaning process. It includes 21% of the existing data.