Water quality targets are set for major rivers and lakes throughout the country and the government is striving to achieve them. As shown in <Table 3-2> and <Table 3-3>, the ambient water quality standard for the living environment is established for river and lake, respectively. It consists of seven grades and one of the grade is assigned to each river reach and lake as the water quality target. In addition, the ambient water quality standard for the human health protection is established for 20 chemicals. as shown in <Table 3-4>, The standard for human health protection is applicable to both rivers and lakes. As a reference of the aquatic ecosystem, indicator species of fish and benthic organisms are specified for each grade of the water quality standard.
Water quality targets for living environment have been specified for 114 river reaches and 49 lakes nationwide to be achieved by 2015. A survey in 2013 indicated that 92 of the 114 river reaches (80.7%) meet the target, while only 6 of the 49 lakes (12.2%) do.
In terms of human health protection, the annual average concentration for each parameter should not exceed the ambient water quality standard. Since 2007, when the water quality standard for human health protection is established, all parameters have satisfied, the standard and accomplished the target at all of the 114 river reaches and 49 lakes until 2012.
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Last modified : 2017-12-12 08:38
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