1. biological assessment of water pollutant toxicity 
   水污染物毒性的生物评价
2. With regard to the items that are already specified in the national standards for discharge of water pollutants, they may establish more stringent local standards than the national standards. 
   对国家水污染物排放标准中已作规定的项目，可以制定严于国家水污染物排放标准的地方水污染物排放标准。
3. All local standards must be reported to the environmental protection department under the State Council for the record. 
   地方水污染物排放标准须报国务院环境保护部门备案。
4. The people's governments of provinces, autonomous regions and municipalities directly under the Central Government may establish their own local standards for the items that are not specified in the national standards for discharge of water pollutants. 
   　　省、自治区、直辖市人民政府对国家水污染物排放标准中未作规定的项目，可以制定地方水污染物排放标准；
5. Their facilities for treating water pollutants must be kept in normal operation; when such facilities are to be dismantled or left idle, the matter must be reported in advance to the environmental protection department of the local people's government at or above the county level for approval. 
   其水污染物处理设施必须保持正常使用，拆除或者闲置水污染物处理设施的，必须事先报经所在地的县级以上地方人民政府环境保护部门批准。

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