Gathering unsafe water in India |
This development had a profound effect on public health. Cholera, dysentery, and typhoid fever were among the common epidemics suffered in London, New York, and other major western cities before what I’ll term the safe water infrastructure was in place. Now those diseases are largely unknown in the west. I’m guessing that for most readers of this blog, safe water is taken largely for granted, as it was by our parents and even our grandparents. In fact, a resident of New York or London probably thinks that the word cholera is quaint and foreign, when as little as 100 years ago it would have caused mortal dread.
Unsafe Water
This isn’t the case everywhere though. Cholera still afflicts millions of people worldwide each year, and a major outbreak occurred in Haiti after the massive, crippling 2010 earthquake. This is because even now, in 2012, billions of people across the globe still lack access to clean drinking water and modern sanitation. Here are a few eye-opening statistics from the World Health Organization (WHO):
- 900 million people lack access to drinking-water from improved water sources (13% of the world population);
- 2.6 billion people lack access to improved sanitation facilities (37% of the world population);
- 2.2 million children die worldwide each year from unsafe water.
- Unsafe water is a major risk factor for diarrheal disease, which is the second leading contributor to the global disease burden.
Here are a couple of maps, taken directly from the U.N.’s 2010 Global Annual Assessment of Sanitation and Drinking-Water (GLAAS) report that illustrate the current safe water crisis (click on them to enlarge):
The top map shows the state of improved sanitation. The pink colored countries are where less than 50% of the population has access to improved sanitation; the light green colored countries are where less than 75% of the population has access to improved sanitation. The first category includes the great majority of sub-Saharan Africa as well as south Asia. The second category includes China, the world’s most populous nation. Less than 90% of the populations of Brazil, Russia, Argentina, and Mexico have access to improved sanitation.
The bottom map shows the state of improved drinking water. The pink colored countries are where less than 50% of the population has access to improved drinking-water; the light blue colored countries are where less than 75% have access; and the medium blue colored countries are where less than 90% have access. The first and second categories include the great majority of sub-Saharan Africa. The third category includes India and China, the world’s two most populous nations. Not surprisingly, all of these nations, including India and China, fare very poorly in the U.N.’s Human Development Index, which attempts to quantify overall quality of life by country [3]. This is hardly surprising; it’s difficult to imagine human development being high where safe water is a luxury.