National Outbreak Reporting System (NORS)

NORS - National Outbreak Reporting System logo

The National Outbreak Reporting System (NORS) is a web-based platform used by local, state, and territorial health departments in the United States to report all waterborne, foodborne, and enteric (intestinal) disease outbreaks to CDC. These outbreaks can be spread by contact with environmental sources, infected people or animals, or other means. Waterborne disease and outbreak reporting to the Waterborne Disease and Outbreak Surveillance System (WBDOSS) transitioned from a paper-based system to NORS in 2009.

Nearly 100,000 people in the United States get sick from foodborne, waterborne, and enteric illness outbreaks each year, according to information reported in NORS. Use NORS Dashboard to explore national surveillance data from outbreaks and learn more about what causes these outbreaks, how often they occur, and where they occur.