We found 20 public water systems in Wahkiakum county (ordered by population size).
| Name | Areas served | Population served | Contaminant count | Violation count |
|---|---|---|---|---|
| Cathlamet Water Dept | County of Wahkiakum | 1,637 | 0 | 178 |
| Puget Island | County of Wahkiakum | 1,282 | 0 | 4 |
| Western Wahkiakum | County of Wahkiakum | 815 | 0 | 25 |
| West Side Water Works | County of Wahkiakum | 208 | 0 | 80 |
| Wahkiakum Fairgrounds | County of Wahkiakum | 116 | 0 | 0 |
| Duck Inn | County of Wahkiakum | 100 | 0 | 0 |
| Skamokawa Vista Park | County of Wahkiakum | 87 | 0 | 0 |
| Skamokawa Silverman Sys | County of Wahkiakum | 70 | 0 | 0 |
| West Side Water Works | County of Wahkiakum | 65 | 0 | 0 |
| Central Skamokawa Water System | County of Wahkiakum | 49 | 0 | 0 |
| County Line Park | County of Wahkiakum | 42 | 0 | 0 |
| Grays River Water Dept | County of Wahkiakum | 42 | 0 | 0 |
| Crista Vista Water System | County of Wahkiakum | 36 | 0 | 0 |
| Elokomin Salmon Hatchery | County of Wahkiakum | 33 | 0 | 0 |
| Beaver Creek Trout Hatchery | County of Wahkiakum | 31 | 0 | 0 |
| Sleepy Hollow Water Co | County of Wahkiakum | 30 | 0 | 0 |
| Beaver Creek Trout Hatchery | County of Wahkiakum | 25 | 0 | 0 |
| Wahkiakum County Pud #1 | County of Wahkiakum | 25 | 0 | 0 |
| Elochoman Salmon Hatchery | County of Wahkiakum | 11 | 0 | 0 |
| Silverman's Emporium Water Sys | County of Wahkiakum | 3 | 0 | 0 |