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标准值 序 | | | | | | | | | | | | 分类 | | Ⅰ类 | Ⅱ类 | Ⅲ类 | Ⅳ类 | Ⅴ类 | | 号 | | | | | | | | | | | 项目 | | | | | | | | | 1 | | 水温 (℃ ) | | | 人为造成的环境水温变化应限制在: | | | | | | | | | 周平均最大温升 ≤1 | | | | | | | | | 周平均最大温降 ≤2 | | | 2 | PH 值(无量纲) | | | | 6---9 | | | | | | | 饱和率 | | | | | | | | | | 90% | | | | | | 3 | 溶解氧 | ≥ | | (或 | 6 | 5 | 3 | 2 | | | | | | | | | | | | | | | 7.5) | | | | | | 4 | 高锰酸盐指数 | ≤ | 2 | 4 | 6 | 10 | 15 | | 5 | 化学需氧量 (COD) | ≤ | 15 | 15 | 20 | 30 | 40 | | 6 | 五 日 生 化 需 氧 量 | 3 | 3 | 4 | 6 | 10 | | | (BOD5) | ≤ | | | | | | | | 7 | 氨氮( NH3-N ) | ≤ | 0.15 | 0.5 | 1.0 | 1.5 | 2.0 | | | | | | 0.02 | 0.1 | 0.2 | 0.3 | 0.4 | | |
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| | | 9 | 总氮(湖、库、以 N 计) | 0.2 | 0.5 | 1.0 | 1.5 | 2.0 | | | ≤ | | | | | | | | |
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| | 11 | 锌 | ≤ | | 0.05 | 1.0 | 1.0 | 2.0 | 2.0 | | 12 | 氟化物 (以 Fˉ计 ) | ≤ | 1.0 | 1.0 | 1.0 | 1.5 | 1.5 | |
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