Although Covid levels detected in wastewater remain low or very low in most states, many are seeing an increase. 

Wastewater Viral Activity Levels for Covid by State for week ending Dec 13, 2025. 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, transformed to the linear scale.
Chart: Bob HawkinsSource: CDC National Wastewater Surveillance SystemGet the dataCreated with Datawrapper