The Centers for Disease Control, or CDC, has released its most recent Surveillance report on disease outbreaks spread by drinking water. This report covers all months in 2007 and 2008--the most recent years for which complete data is available. In the report we learn that 36 outbreaks were directly associated with drinking water and those outbreaks sickened more than 4000 Americans. At least 3 people died as a result of those outbreaks.
By far, the most common illnesses involved acute gastrointestinal illnesses. More than 61% of all drinking-water-associated outbreaks--22 in all--had "tummy bugs" as their main problem. Coming in at a distant 2nd were acute respiratory infections, or ARIs, which were implicated in 12 outbreaks or 33% of the total. Skin irritation and hepatitis tied for 3rd place. They were each blamed for 1 outbreak each.
The vast majority of these outbreaks were blamed on problems that occurred at some point in the water treatment process. Only 13 outbreaks occurred outside the control of a municipal water system. And only 1 of
those was ultimately linked to a pluming problem.
As for the various germs that caused these outbreaks, most of them--9, in fact--were caused by bacteria. Viruses were to blame in 5 outbreaks and parasites took the blame in another 2. The improper use of chemicals caused 1 and a combination of bacteria and viruses caused another. In 3 cases the exact cause was never actually identified.
So what did the CDC learn from all this info? Well, one thing experts know is that we aren't seeing fewer outbreaks and that's even taking into consideration that government agencies have been collecting data like this since 1971. The second is that
Legionella continues to the be our main threat when it comes to water-borne diseases.
So, who else has the urge to go check their water filters?