中国水利统计年鉴2019-1-152018年河流水质状况(按水资源分区分)

Rivers,LakesandWaterResources221-152018年河流水质状况（按水资源分区分）WaterQualityofRiversof2018(byWaterResourcesSub-region)水资源一级区Grade-ⅠWaterResourcesRregions评价河长分类河长占评价河长百分比/％/千米PercentageofClassedRiverLengthtotheTotalAssessed/％AssessedRiverLengthⅠ类Ⅱ类Ⅲ类Ⅳ类Ⅴ类劣Ⅴ类/kmClass-ⅠClass-ⅡClass-ⅢClass-ⅣClass-ⅤInferiortoClass-Ⅴ全国Total262364.28.751.021.98.74.25.5松花江区SonghuaRiver16633.11.420.653.19.78.07.2辽河区LiaoheRiver5519.21.421.636.714.36.519.5海河区HaiheRiver15495.32.125.515.017.415.025.0黄河区YellowRiver23043.111.944.117.88.75.212.3淮河区HuaiheRiver24431.80.817.842.223.29.36.7长江区YangtzeRiver85897.97.261.219.77.62.02.3其中:太湖流域AmongWhich:TaihuLake6219.310.132.440.011.06.5东南诸河区SoutheastRivers14340.88.162.121.76.00.81.3珠江区PearlRiver32491.74.665.616.86.33.03.7西南诸河区SouthwestRivers21085.511.672.013.22.50.20.5西北诸河区NorthwestRivers23425.834.554.36.60.32.41.9