This week, Covid activity levels in wastewater are moderate or low in most states but higher in states in the West and South.

Wastewater Viral Activity Levels for Covid by State for week ending Oct 17, 2026. Hover the cursor over a State to find more details.

The Wastewater Viral Activity Level is a calculated measure that aggregates wastewater sample data to get state, regional, and national levels and see trends over time. The value associated with the Wastewater Viral Activity Level is the number of standard deviations above the baseline from the past 24 months, transformed to the linear scale.
Chart: Bob HawkinsSource: CDC National Wastewater Surveillance SystemGet the data