Data from the Netherlands show that wastewater levels closely track Covid prevalence and testing outcomes.

Comparison of weekly Covid wastewater levels, estimated prevalence, and percent of positive tests in the Netherlands: Jan 8, 2023 to Sep 20, 2026.

Estimated prevalence is determined from positive test results provided by volunteers in the weekly Infection Radar survey, adjusted to reflect the demographics of the Netherlands’ population.
Chart: Bob HawkinsSource: Netherlands Infection Radar DashboardGet the data