Wastewater Monitoring Results for 2025-11-22

November 26, 2025

Monitoring wastewater is essential for detecting early trends in viral infections, as it reveals changes in infection rates even when clinical testing declines, thereby aiding public health preparedness. Recent data shows stable, medium-level concentrations of Influenza A and RSV, while Influenza B is undetected, with historical context provided to assess current levels.

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

Monitoring wastewater is crucial because it can reveal early trends in viral infections, as people excrete viruses in their urine and feces. This method allows for the detection of changes in infection rates, even when clinical testing decreases, thereby supporting public health preparedness.

The most recent data shows concentrations of 40.0 gc/L for both Influenza A and RSV, while Influenza B is not detected. Over the past 30 days, Influenza A and RSV levels have been stable, with concentrations remaining consistent with year-to-date averages. These levels are considered medium compared to historical data, and they do not necessarily indicate the severity of diseases.

Table 1 provides a summary of the combined activity of these viruses over the last seven days, reflecting current conditions. Table 2 offers a view of annual historical peaks, giving a long-term context. These tables help determine whether the current levels are unusual or within expected ranges.

RSV, or Respiratory Syncytial Virus, is a common respiratory virus. Influenza A and B are two types of flu viruses that cause seasonal epidemics. RNA is a molecule that carries genetic information. PCR, or Polymerase Chain Reaction, is a technique used to amplify small segments of DNA or RNA for analysis.


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)
2025-11-23 40 0 40
2025-11-22 40 0 40
2025-11-21 82,800 0 40
2025-11-20 40 0 0
2025-11-19 40 0 0
2025-11-18 40 0 0
2025-11-16 0 0 6,160


Table 2: Highest Yearly Influenza and RSV Levels Detected in Wastewater by Year (as of 2025-11-22)
year Date Influenza A (gc/L) Influenza B (gc/L) RSV (gc/L) Total (gc/L)
2025 2025-01-04 291600 45600 17360 354560
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.