湘江乌龙嘴断面监测数据统计(9月)
采样日期:2017.9.4 | ||||||||||
监测 项目 | 单位 | 采样位置 | 最低值 | 最高值 | 平均值 | Ⅲ类水质标准 | 超标率 % | 单项水质类别 | ||
左 | 中 | 右 | ||||||||
水温 | 摄氏度 | 24.7 | 24.7 | 24.7 | 24.7 | 24.7 | 24.7 | / | / | / |
电导率 | ms/m | 20.5 | 21.0 | 18.9 | 18.9 | 21.0 | 20.1 | / | / | / |
pH | 无量纲 | 7.62 | 7.92 | 7.83 | 7.62 | 7.92 | 7.62~7.92 | 6~9 | 0.00 | Ⅰ |
溶解氧 | mg/L | 7.0 | 6.9 | 6.7 | 6.7 | 7.0 | 6.9 | ≥5 | 0.00 | Ⅰ |
高锰酸盐指数 | mg/L | 2.3 | 2.1 | 2.3 | 2.1 | 2.3 | 2.2 | ≤6 | 0.00 | Ⅱ |
化学需氧量 | mg/L | 12 | 11 | 12 | 11 | 12 | 12 | ≤20 | 0.00 | Ⅰ |
生化需氧量 | mg/L | 2.5 | 2.4 | 2.4 | 2.4 | 2.5 | 2.4 | ≤4 | 0.00 | Ⅰ |
氨氮 | mg/L | 0.52 | 0.64 | 0.44 | 0.44 | 0.64 | 0.53 | ≤1.0 | 0.00 | Ⅲ |
总磷 | mg/L | 0.08 | 0.07 | 0.08 | 0.07 | 0.08 | 0.08 | ≤0.2 | 0.00 | Ⅱ |
总氮 | mg/L | 1.72 | 1.73 | 1.70 | 1.70 | 1.73 | 1.72 | ≤1.0 | / | / |
铜 | mg/L | 0.001ND | 0.001ND | 0.001ND | 0.001ND | 0.001ND | 0.001ND | ≤1.0 | 0.00 | Ⅰ |
锌 | mg/L | 0.05ND | 0.05ND | 0.05ND | 0.05ND | 0.05ND | 0.05ND | ≤1.0 | 0.00 | Ⅰ |
氟化物 | mg/L | 0.421 | 0.377 | 0.401 | 0.377 | 0.421 | 0.400 | ≤1.0 | 0.00 | Ⅰ |
硒 | mg/L | 0.0004ND | 0.0004ND | 0.0004ND | 0.0004ND | 0.0004ND | 0.0004ND | ≤0.01 | 0.00 | Ⅰ |
砷 | mg/L | 0.0003ND | 0.0003ND | 0.0003ND | 0.0003ND | 0.0003ND | 0.0003ND | ≤0.05 | 0.00 | Ⅰ |
汞 | mg/L | 0.00004ND | 0.00004ND | 0.00004ND | 0.00004ND | 0.00004ND | 0.00004ND | ≤0.0001 | 0.00 | Ⅰ |
镉 | mg/L | 0.0001ND | 0.0001ND | 0.0001ND | 0.0001ND | 0.0001ND | 0.0001ND | ≤0.005 | 0.00 | Ⅰ |
六价铬 | mg/L | 0.004ND | 0.004ND | 0.004ND | 0.004ND | 0.004ND | 0.004ND | ≤0.05 | 0.00 | Ⅰ |
铅 | mg/L | 0.002ND | 0.002ND | 0.002ND | 0.002ND | 0.002ND | 0.002ND | ≤0.05 | 0.00 | Ⅰ |
氰化物 | mg/L | 0.001ND | 0.001ND | 0.001ND | 0.001ND | 0.001ND | 0.001ND | ≤0.2 | 0.00 | Ⅰ |
挥发酚 | mg/L | 0.0003ND | 0.0003ND | 0.0003ND | 0.0003ND | 0.0003ND | 0.0003ND | ≤0.005 | 0.00 | Ⅰ |
石油类 | mg/L | 0.02 | 0.02 | 0.01 | 0.01 | 0.02 | 0.02 | ≤0.05 | 0.00 | Ⅰ |
阴离子表面活性剂 | mg/L | 0.05ND | 0.05ND | 0.05ND | 0.05ND | 0.05ND | 0.05ND | ≤0.2 | 0.00 | Ⅰ |
硫化物 | mg/L | 0.005ND | 0.005ND | 0.005ND | 0.005ND | 0.005ND | 0.005ND | ≤0.2 | 0.00 | Ⅰ |
粪大肠菌群 | 个/L | 9200 | 9200 | 9200 | 9200 | 9200 | 9200 | ≤10000 | 0.00 | Ⅲ |
断面水 质类别 | Ⅲ类 | 主要 污染物 | / |