Water Resources
The most critical environmental problem that Thailand is facing presently, is the water pollution. Despite the annual southwest monsoon, Thailand is subject to drought, particularly the northeastern region. As of 2002, Thailand had less available water per person than any other country in Asia, and nearly one third of its water was “unsuitable for human consumption.” Unconsumable water was also a result of increasing untreated domestic sewage, industrial wastewater and solid hazardous wastes.
Like air pollution, water pollution is most serious in the populous Central Region, with high levels of industrial and domestic wastewater. The depletion of the water table around Bangkok has led to land subsidence.
Coastal waters also face challenges. The Gulf of Thailand is primarily polluted by domestic wastewater, and further by waste from industry and tourism. In addition to the Gulf, high pollution levels were found at the mouths of the Chao Phraya, Tha Chin, Pak Panang, Pattani and Ranong rivers. Coastal water quality in most areas, however, are within acceptable standards.
Water pollution has become obvious in many areas. In 1997, hundreds of thousands of fish and other aquatic life in the Nam Phong River died as a result of industrial river pollution. Large amounts of arsenic were found in the groundwater in the Nakhon Si Thammarat province, a result of mining industry in the area. Pollution affects the marine environment. Red tides, caused by excessive algae growth and a result of pollution, oil spills, and invasive species are some of the factors that are affecting Thailand's marine biodiversity.
Another major pollution is the heavy metals that have seeped into the rivers of Thailand for many years. In Chao Phraya estuary, mercury levels have far exceeded the normal standards, and such high concentration of heavy metal on the river bed poses a serious threat to ecosystems.
Read more about this topic: Environmental Issues In Thailand
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