Arsenic poisoning is a real problem in Bangladesh. A recent paper in Nature 2008, vol 454 p 263 indicates that many other areas in SE Asia may be troubled by arsenic pollution of the water.
A map of contamination indicates that the Myanmar Irrawaddy Delta may be contaminated by arsenic. Many of these countrey’s wells are polluted. Arsenic poisoning can cause skin lesions and cancer.
The reason is that the deltas fill with relatively new sediments only 10,000 years old. These are more likely to release arsenic.
3.5 million people live in these regions.
Ledford 2009 Irrawaddy may be poisoned by arsenic Nature vol 454 pp 263
- Martin Eastwood