COVID Levels in Washington
In the week ending 10 October 2026, wastewater virus levels in Washington were High or Very High for COVID-19 at 21 of 26 sites, Flu A at 0 of 26 sites, RSV at 0 of 25 sites. COVID-19 was High or Very High at 81% of the state's sampling sites. Source: CDC wastewater surveillance.
Very High High Moderate Low Very Low
Sampling sites in Washington 26
| Counties served | People served | COVID-19 | Flu A | RSV |
|---|---|---|---|---|
| King, Pierce | 896,000 | Very High | Low | Very Low |
| King, Snohomish | 789,000 | Very High | Low | Very Low |
| Pierce | 295,855 | Very High | Very Low | Very Low |
| King, Snohomish | 288,000 | High | Very Low | Very Low |
| Spokane | 225,000 | Very High | Very Low | Very Low |
| Snohomish | 173,800 | Very High | Very Low | Very Low |
| Clark | 162,100 | High | Very Low | Very Low |
| Clark | 120,000 | Very High | Very Low | Very Low |
| Spokane | 120,000 | Very High | Very Low | Very Low |
| Thurston | 119,790 | Very High | Very Low | — |
| Yakima | 117,072 | Very High | Very Low | Very Low |
| Clark | 81,140 | Very High | Very Low | Very Low |
| Franklin | 73,000 | High | Very Low | Very Low |
| Pierce | 43,000 | High | Very Low | Very Low |
| Snohomish | 37,650 | Very High | Moderate | Very Low |
| Whitman | 35,812 | Moderate | Low | Very Low |
| Skagit | 35,600 | Very High | Very Low | Very Low |
| Walla Walla | 33,000 | Moderate | Very Low | Very Low |
| Island | 24,180 | High | Very Low | Very Low |
| Kittitas | 21,761 | Moderate | Very Low | Very Low |
| Snohomish | 20,000 | Moderate | Very Low | Very Low |
| Benton | 15,000 | Very High | Very Low | Very Low |
| Snohomish | 10,150 | Very High | Low | Very Low |
| Jefferson | 10,000 | Very High | Very Low | Very Low |
| Grant | 8,475 | Low | Very Low | Very Low |
| Island, Snohomish | 7,125 | Very High | Low | Very Low |
When levels are high where you live
- Stay current on vaccines for COVID-19 and flu, and RSV if you are 75+, 50–74 with risk factors, pregnant, or have an infant.
- Test if you have symptoms; antivirals for COVID-19 and flu work best in the first days and are meant for people at higher risk.
- A well-fitting mask in crowded indoor places and better ventilation cut the risk for you and for people around you.
- Stay home when sick. Outbreak news is in our epidemic record.
What this page shows, and what it misses
CDC's weekly wastewater viral activity level for each sampling site — a treatment plant or a point upstream — compared with that site's own baseline, in five categories from Very Low to Very High. State rows count sites; CDC's own state level, on its map, weighs sites differently and can differ from what these counts suggest. Places not on a sewer system, and sites that did not report this week, are not covered. Wastewater shows community spread, not the number of cases.
Data: Centers for Disease Control and Prevention, National Wastewater Surveillance System, "CDC Wastewater Viral Activity Level for SARS-CoV-2, Influenza A and RSV" (data.cdc.gov) — public domain U.S. Government work.