Wastewater activity
A community signal from participating sewage-monitoring sites. It can include people who have not been tested.
PUBLIC HEALTH, IN PERSPECTIVE
What’s circulating
near you?
Follow virus and disease activity across the United States.
Clear maps. Useful trends. Public data.
Official public sources
9 diseases in focus
CDC surveillance · Free to explore
United States 50 states + D.C.
THE WATCH LIST
Choose a disease to explore COMMUNITY SIGNAL
COVID-19 activity map
Median activity at reporting wastewater sites · Sep 26, 2026
Select a state for a closer look
Very lowLowModerateHighVery highNo data
TAQ-calculated site medians. Coverage varies by state.
Reporting historyLatest available
Jul 4
A LITTLE CONTEXT GOES A LONG WAY
Signals. Not a diagnosis.
These measures answer different questions. Explore each disease on its own terms.
Reported cases
Cases submitted to public-health agencies. Counts can arrive late and change as records are reviewed.
Tests & outbreaks
Laboratory positivity and sentinel outbreak reports provide context. They do not measure everyone’s infection risk.
Sources, coverage & methodology
TAQ Bio follows nine diseases with useful public surveillance: common respiratory and gastrointestinal infections, vaccine-preventable diseases, and mosquito-borne viruses. This is an editorial watch list, not a ranking of the deadliest or most prevalent diseases. Whooping cough is bacterial.
CDC Wastewater / NWSS
COVID-19, influenza A and RSV. Weekly site data. TAQ calculates state medians from finite, categorized CDC values and a U.S. median across the available 50-state/D.C. medians. Differences in site inclusion and coverage can make these differ from CDC’s own displayed aggregates. These are not counts of infections.
Activity bands follow CDC thresholds published in August 2026. COVID: 2.6 / 4.9 / 7.9 / 11.6; influenza A: 2.4 / 5.5 / 10.2 / 15.6; RSV: 1.7 / 3.4 / 5.4 / 8.1. Each cutoff is inclusive. Influenza A surveillance does not identify a particular subtype or include influenza B.
CDC methodology ↗CDC NNDSS
Measles, pertussis, dengue and West Nile. Provisional weekly/YTD reports. Measles combines imported and indigenous reports. New York combines New York and NYC. U.S. totals use the official U.S. Residents row; territories are excluded. Dengue uses the Dengue category; the separate severe-dengue table is not added.
Unavailable, not reportable, not published and missing values remain unavailable. CDC’s “no cases reported” flag displays as zero; this does not demonstrate zero infections. Weekly reports must not be summed to reconstruct YTD.
NNDSS dataset ↗CDC NREVSS & NoroSTAT
hMPV: weekly national percent positivity among reported tests, with suppressed values kept unavailable. Norovirus: monthly releases of weekly suspected/confirmed outbreaks from 12 participating states. Individual state outbreak counts are not provided by that table.
Norovirus participants: Colorado, Michigan, Minnesota, Nebraska, New Hampshire, North Carolina, Ohio, Oregon, South Carolina, Tennessee, Virginia and Wisconsin. State selections do not change these national/network views.
NREVSS dashboard ↗NoroSTAT table ↗
Public sources require no paid data subscription. Sources are checked when the tracker loads, with caching for up to six hours. Source releases are generally weekly, or monthly for NoroSTAT. A dated verified copy remains visible when a source is unavailable; delayed reporting is labeled. Missing observations are not filled with estimated values. CSV downloads include the selected measure, reporting period and source.
U.S. coverage is the first release. Global data is not included because reporting schedules, measures and geographic coverage differ across countries. Map outlines: PublicaMundi MappingAPI U.S. state boundary GeoJSON. General information only; follow your local health department’s guidance for current local advice.