Wastewater virus levels
Covid wastewater level 4.7, as of 24 Oct 2026. Wastewater virus level, national. Wastewater virus levels and the other weird recession indicators are on one page, each with its latest reading.
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CDC wastewater data (National Wastewater Surveillance System, dataset atcp-73re). Each sewage site gets a weekly viral activity level that compares it with that site's own baseline; 1 is the lowest the scale goes.
CDC publishes this per site. The national figure here is our summary: the median level of all sites reporting that week, for COVID (SARS-CoV-2), flu A and RSV. Sites report late, so the newest week or two have fewer sites and move a lot. This shows the newest week with at least 90% as many sites as a full week (the most sites any of the last 8 weeks had).
Source: CDC NWSS. As of 24 Oct 2026.