Surveillance for Waterborne Disease Outbreaks Associated With Drinking Water — United States, 2011–2012
Abstract
Advances in water management and sanitation have substantially reduced waterborne disease in the United States, although outbreaks continue to occur (1). Public health agencies in the U.S. states and territories report information on waterborne disease outbreaks to the CDC Waterborne Disease and Outbreak Surveillance System (http://www.cdc.gov/healthywater/surveillance/index.html). For 2011–2012, 32 drinking water–associated outbreaks were reported, accounting for at least 431 cases of illness, 102 hospitalizations, and 14 deaths. Legionellawas responsible for 66% of outbreaks and 26% of illnesses, and viruses and non-Legionella bacteria together accounted for 16% of outbreaks and 53% of illnesses. The two most commonly identified deficiencies† leading to drinking water–associated outbreaks were Legionella in building plumbing systems (66%) and untreated groundwater (13%). Continued vigilance by public health, regulatory, and industryprofessionals to identifyandcorrectdeficiencies associatedwithbuildingplumbingsystemsandgroundwater systems could prevent most reported outbreaks and illnesses associated with drinking water systems. This report provides information on drinking water– associated waterborne disease outbreaks in which the first illness occurred in 2011 or 2012 (http://www. cdc.gov/healthywater/surveillance/drinking-surveillancereports.html), and summarizes outbreaks reported to the Waterborne Disease and Outbreak Surveillance Systemthrough the electronic National…
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