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Southern rivers suffer heavy pollution
12/08/2010
The quality of water in the Sai Gon and Dong Nai rivers is deteriorating rapidly, and protective measures have been too slow, officials have said.
Vo Quang Chau, deputy general director of the Sai Gon Water Corporation (SAWACO), said that tests carried out in the two rivers this month found they failed all the five water quality criteria applied.
The results underscored the rising pollution levels in both rivers, especially in the Sai Gon River basin, he said.
The level of amonia was 28 times higher than the permitted standard while Chemical Oxygen Demands (COD), an indicator of organic pollutant in water, and bacteria levels exceeded permitted standards by 1.2-1.4 and 2-4 times, respectively, Chau said at a meeting held by the city's People's Committee on Thursday.
Salt water intrusion into the two rivers had also worsened, he said.
More than half of the river routes and urban canals linked to the two rivers with a combined length of 3,000km was polluted, and this had worsened the quality of water resources, an official of the HCM City Steering Centre of the Urban Flood Control Programme said at the meeting.
Discussing the main reasons for water pollution, a representative of the city's Environmental Police division said many enterprises were discharging untreated effluents directly into the rivers through underground pipelines, making it difficult for the police to uncover the violation.
The overlapping of responsibilities in the management of canals and rivers among different departments and agencies, a long-lasting problem, had also contributed to worsening environmental degradation, the meeting heard.
For example, the management of canals was shared by the city's departments of Transport, Natural Resources and Environment as well as Agriculture and Rural Development, participants noted.
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