COVID Levels in Missouri
In the week ending 10 October 2026, wastewater virus levels in Missouri were High or Very High for COVID-19 at 1 of 18 sites, Flu A at 0 of 18 sites, RSV at 1 of 18 sites. COVID-19 was High or Very High at 6% of the state's sampling sites. Source: CDC wastewater surveillance.
Very High High Moderate Low Very Low
Sampling sites in Missouri 18
| Counties served | People served | COVID-19 | Flu A | RSV |
|---|---|---|---|---|
| Cass, Jackson, Johnson | 490,000 | Low | Very Low | Very Low |
| Saint Louis | 451,367 | Moderate | Very Low | Low |
| Saint Louis, Saint Louis City | 306,647 | Very Low | Very Low | Moderate |
| Saint Charles, Saint Louis | 174,537 | Moderate | Very Low | Very Low |
| Saint Louis | 115,895 | Moderate | Very Low | Low |
| Jefferson, Saint Louis | 66,738 | Very High | Very Low | Very Low |
| Jackson, Johnson, Wyandotte | 61,250 | Very Low | Very Low | Very Low |
| Saint Charles | 44,852 | Very Low | Very Low | Moderate |
| Callaway, Cole | 41,153 | Very Low | Very Low | Very Low |
| Cape Girardeau, Scott | 33,540 | Moderate | Very Low | Very Low |
| Greene | 22,818 | Low | Very Low | Moderate |
| Clay, Platte | 13,940 | Moderate | Very Low | Very Low |
| Clay, Platte | 12,855 | Low | Very Low | Very Low |
| Clay | 12,000 | Very Low | Very Low | Very Low |
| Howell | 12,000 | Moderate | Very Low | Very High |
| Barry, Lawrence | 9,100 | Low | Very Low | Very Low |
| Vernon | 8,082 | Moderate | Very Low | Very Low |
| Dent | 4,512 | Very Low | Very 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.