NWSS Wastewater Monitoring in the U.S.
![National Wastewater Surveillance System graphic](/nwss/images/WastewaterWeb_WastewaterWatch.png?_=91770)
Wastewater (sewage) can be tested to detect traces of infectious diseases circulating in a community, even if people don’t have symptoms. You can use these data as an early warning that levels of infections may be increasing or decreasing in your community.
Wastewater Monitoring Data
![WastewaterWeb_Hero_2 Wastewater hero](/nwss/images/WastewaterWeb_Hero_2.png?_=85728)
CDC’s National Wastewater Surveillance System (NWSS) program collects and displays wastewater data from communities across the United States.
Wastewater detections of the virus that causes mpox in the past 4 weeks, United States
2025-02-13