28主要水系干流统计2007年

Ⅰ类GradeⅠⅡ类GradeⅡ长江ChangjiangRiver10312.648.5黄河HuangheRiver4420.5珠江ZhujiangRiver339.142.4松花江SonghuajiangRiver422.47.1淮河HuanheRiver867.0海河HaiheRiver626.512.9辽河LiaoheRiver3732.4资料来源：环境保护部。Source:MinistryofEnvironmentalProtection.2-8主要水系干流水质状况评价结果(按监测断面统计)(2007年)EvaluationofRiverWaterQualitybyWaterSystem(byMonitoringSections)(2007)主要水系MainWaterSystem监测断面个数(个)NumberofMonitoringSections(unit)分类水质断面占全部断面百分比(％)Proportion0fMonitoredSectionWaterQuality(％)Ⅲ类GradeⅢⅣ类GradeⅣⅤ类GradeⅤ劣Ⅴ类WorsethanGradeⅤ20.43.97.86.843.29.14.522.730.315.23.014.352.44.819.018.639.59.325.66.59.711.353.110.810.85.540.5资料来源：环境保护部。Source:MinistryofEnvironmentalProtection.2-8主要水系干流水质状况评价结果(按监测断面统计)(2007年)EvaluationofRiverWaterQualitybyWaterSystem(byMonitoringSections)(2007)分类水质断面占全部断面百分比(％)Proportion0fMonitoredSectionWaterQuality(％)