The municipal domestic sewage is a major source of the surface water pollution, which makes up 70.5% of the total sewage in Fuzhou.

福州市市区生活污水占总污水量的70.5%，是福州市地表水污染的重要来源。

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The result indicates that the pollution of surface water in Liaohe river basin is mainly the organic pollution, the point source polluted is weighter than the surface pollution.

结果表明：辽河流域地表水水质污染以有机污染为主， 点源污染重于面源污染。

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A lot of fertilizer applications have become an important source of non-point source pollution in rural area, which affects the safety of surface water for drinking.

化肥的大量施用已成为农村面源污染的一个重要来源，直接影响到农村村镇地表饮用水安全。

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