经过技术改造，废水处理系统的各项主要水质指标均达到了国家污水综合排放标准。
Through these technical alterations, the main indexes of water quality of the waste water disposal system met the national comprehensive standards on waste water emmision.
沱江干流的几个主要水质指标与10年前相比呈继续恶化的趋势，干流的水污染仍未得到控制。
The main indexes of water quality in most part of the river were worse than those 10 years ago.
研究表明，水质43.7%的化学需氧量(测量水质有机化合物的主要指标)、67%的含磷量和57%含氮量应归咎于农业。
According to the study agriculture is responsible for 43.7% of the nation's chemical oxygen demand (the main measure of organic compounds in water) 67% of phosphorus and 57% of nitrogen discharges.
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