Waterborne Outbreaks Summary Reports

Overview

State, local, and territorial health departments in the United States report waterborne disease outbreaks to CDC through the National Outbreak Reporting System (NORS). CDC summarizes these data, available in the reports below. Find more waterborne disease outbreak data on CDC's BEAM Dashboard.

Data summary reports

Read summaries of reported waterborne disease outbreaks, including outbreaks linked to recreational water, drinking water, other water exposures, and unknown water exposures.

2021-nors-report cover
2021 Annual Surveillance Report
2021 Waterborne Disease Outbreaks Annual Surveillance Report
Download
Download
2015-nors-report cover
2015 Annual Surveillance Report
2015 Waterborne Disease Outbreaks Annual Surveillance Report
Download
Download

Drinking water

Surveillance of Waterborne Disease Outbreaks Associated with Drinking Water — United States, 2015–2020
MMWR. Surveillance Summaries / Vol. 73 / No. 1 / P. 1–23

Recreational water

Outbreaks Associated with Treated Recreational Water — United States, 2015–2019
MMWR. Morbidity and Mortality Weekly Report / Vol. 70 / No. 20 / P. 733–738

Top 5 causes of recreational water outbreaks—United States, 1971–2020‎

1. Cryptosporidium


2. Pseudomonas


3. Legionella


4. Shigella


5. Norovirus


Explore waterborne disease outbreak data on CDC's BEAM Dashboard.

More data

Print
Content Source:
National Center for Emerging and Zoonotic Infectious Diseases (NCEZID)