Wastewater Monitoring Results for 2026-04-06

April 8, 2026

Wastewater monitoring offers an early community-wide signal of respiratory virus activity by tracking viral genetic material shed by infected individuals. Recent measurements show RSV RNA present at 8.58 gene copies per liter, while Influenza A and B were not detected, with this data providing both current and historical context for public health preparedness.

Photo: CDC, woman-holding-laboratory-appratus, on Unsplash.com, licensed under Unsplash License.

Wastewater monitoring provides an early signal of respiratory virus activity in the community. When people are infected, they shed viral genetic material in their feces and urine. Tracking these levels in wastewater helps detect trends even when individual testing rates change. This surveillance supports public health preparedness by offering a community-wide snapshot.

The most recent measurement shows RSV RNA at 8.58 gene copies per liter of wastewater. For context, this level is based on a 7-day combined sample. Influenza A and Influenza B RNA were not detected in this measurement. These levels do not indicate disease severity.

The data is presented in two tables. Table 1 shows the combined viral activity over the last seven days, providing a view of current conditions. Table 2 provides the annual historical peaks for each virus, offering long-term context. This helps show whether current levels are unusual compared to past seasons.

A brief glossary: RSV is a common respiratory virus that can cause cold-like symptoms. Influenza A and Influenza B are viruses that cause seasonal flu. RNA is the genetic material of these viruses. PCR is a lab method used to detect and measure this RNA.


Table 1: Latest Influenza A, Influenza B, and RSV Levels in Wastewater (last7 Days)
Date Influenza A (gc/L) Influenza B (gc/L) RSV (gc/L)
2026-04-06 0 0 3,432
2026-04-05 0 0 40
2026-04-04 0 0 40
2026-04-03 0 0 40
2026-04-02 0 0 40
2026-03-31 0 0 3,352
2026-03-29 0 0 11,840


Table 2: Highest Yearly Influenza and RSV Levels Detected in Wastewater by Year (as of 2026-04-06)
year Date Influenza A (gc/L) Influenza B (gc/L) RSV (gc/L) Total (gc/L)
2026 2026-02-26 0 488000 30800 518800
2025 2025-12-05 456000 0 44400 500400
2024 2024-10-01 0 0 219200 219200
2023 2023-12-07 50800 1008 828000 879808
2022 2022-12-01 263200 77200 1052000 1392400
2021 2021-11-21 0 0 66400 66400

Data source: Abwassermonitoring: Influenza und RSV
Additional resources: Infectious Diseases Dashboard (IDD), OGD-BS Dashboard: Virenmonitoring im Abwasser

🤖 This text was generated with the assistance of AI. All quantitative statements are derived directly from the dataset listed under Data Source.