Overview
Data collected through the One Health Harmful Algal Bloom System (OHHABS) helps CDC and partners better understand harmful algal blooms and prevent associated human and animal illnesses.
OHHABS is a CDC surveillance system launched in 2016. State and territorial health departments and their designated environmental health or animal health partners can voluntarily report data to OHHABS.
OHHABS collects data on:
- Human illnesses
- Animal illnesses
- Harmful algal bloom events that occur in fresh, brackish, or salt waters
Find OHHABS data by year in the reports below.
Data reports
Fifteen states reported 372 HAB events, 95 human illnesses, and 102,071+ animal illnesses.
Sixteen states reported 368 HAB events, 117 human illnesses, and at least 2,715 animal illnesses.
Thirteen states reported 227 HAB events, 95 human illnesses, and at least 1,170 animal illnesses.
Fourteen states reported 242 HAB events, 63 human illnesses, and 367 animal illnesses.
MMWR. Morbidity and Mortality Weekly Report / Vol. 69 / No. 50 / P. 1889–1894
Supplemental tables and figures for the 2016-2018 One Health Harmful Algal Bloom System Report.