The latest scientific study of the lake's water quality, conducted in 2007 by Yangon University's zoology department, concluded that Inle was undergoing eutrophication, the presence of excessively rich nutrients from runoffs, which cause dense growth of plant life and death of animal life from lack of oxygen. The levels of phosphates and nitrates, prime components of chemical fertilizers, was found to be above acceptable World Health Organization levels — 20 milligrams of phosphate per litre of water, or four times the standard for safe drinking water. Arsenic was detected in one of the streams flowing into the lake.
Source: http://www.news.myanmaronlinecentre.com/2013/10/07/burma-tourism-blessing-or-a-curse-2/
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