28主要水系干流果按监测断面统计

2—8主要水系干流水质状况评价结果(按监测断面统计)(2006年)EvaluationofRiverWaterQualitybyWaterSystem(byMonitoringSections)(2006)监测断面分类水质断面占全部断面百分比(％)个数(个)ProportionofMonitoredSectionWaterQuality(％)MainWaterNumberofⅠ类Ⅱ类主要水系SystemMonitoringGradeⅠGradeⅡSections(unit)长江ChangjiangRiver3116.167.7黄河HuangheRiver2222.7珠江ZhujiangRiver1513.353.3松花江SonghuajiangRiver11淮河HuanheRiver147.1海河HaiheRiver2辽河LiaoheRiver1315.4资料来源：国家环境保护总局。Source:StateEnvironmentalProtectionAdministration.分类水质断面占全部断面百分比(％)ProportionofMonitoredSectionWaterQuality(％)Ⅲ类Ⅳ类Ⅴ类劣Ⅴ类GradeⅢGradeⅣGradeⅤWorsethanGradeⅤ9.76.545.531.820.013.336.463.635.757.150.050.015.430.838.5