8-37  Sea Area with Water Quality Not Reaching Standard of Grade 1 (2015)|8-37SeaAreawithWaterQualityNotReachingStandardofGrade1(2015)|(sq.km)|Item|SeaAreawith|SeaAreawith|SeaAreawith|SeaAreawith|WaterQuality|WaterQuality|WaterQuality|WaterQuality|atGrade2|atGrade3|atGrade4|BelowGrade4|Total|54120|36900|23570|40020|BohaiSea|12010|8090|4750|4060|HuanghaiSea|15570|9490|8020|4680|DonghaiSea|22050|9410|9000|26670|NanhaiSea|4490|9910|1800|4610