为保护和合理开发地下水资源，防止和控制地下水污染，保障人民身体健康，促进经济建设，特制订本标准。
表1 地下水质量分类指标
项目序号 | 类别 标准值 项目 | Ⅰ类 | Ⅱ类 | Ⅲ类 | Ⅳ类 | Ⅴ类 |
1 | 色(度) | ≤5 | ≤5 | ≤15 | ≤25 | >,25 |
2 | 嗅和味 | 无 | 无 | 无 | 无 | 有 |
3 | 浑浊度,(度) | ≤3 | ≤3 | ≤3 | ≤10 | >,10 |
4 | 肉眼可见物 | 无 | 无 | 无 | 无 | 有 |
5 | pH | 6,5～8,5 | 5,5～6,5,8,5～9 | <,5,5,>,9 | ||
6 | 总硬度(以CzCO3,计)(mg/L) | ≤150 | ≤300 | ≤450 | ≤550 | >,550 |
7 | 溶解性总固体(mg/L) | ≤300 | ≤500 | ≤1000 | ≤2000 | >,2000 |
8 | 硫酸盐(mg/L) | ≤50 | ≤150 | ≤250 | ≤350 | >,350 |
9 | 氯化物,(mg/L) | ≤50 | ≤150 | ≤250 | ≤350 | >,350 |
10 | 铁(Fe)(mg/L) | ≤0,1 | ≤0,2 | ≤0,3 | ≤1,5 | >,1,5 |
11 | 锰(Mn)(mg/L) | ≤0,05 | ≤0,05 | ≤0,1 | ≤1,0 | >,1,0 |
12 | 铜(Cu)(mg/L) | ≤0,01 | ≤0,05 | ≤1,0 | ≤1,5 | >,1,5 |
13 | 锌(Zn)(mg/L) | ≤0,05 | ≤0,5 | ≤1,0 | ≤5,0 | >,5,0 |
14 | 钼(Mo)(mg/L) | ≤0,001 | ≤0,01 | ≤0,1 | ≤0,5 | >,0,5 |
15 | 钴(Co)(mg/L) | ≤0,005 | ≤0,05 | ≤0,05 | ≤1,0 | >,1,0 |
16 | 挥发性,酚类,(以,苯酚,计)(mg/L) | ≤0,001 | ≤0,001 | ≤0,002 | ≤0,01 | >,0,01 |
17 | 阴离子合成洗涤剂(mg/L) | 不得检出 | ≤0,1 | ≤0,3 | ≤0,3 | >,0,3 |
18 | 高锰酸盐指数(mg/L) | ≤1,0 | ≤2,0 | ≤3,0 | ≤10 | >,10 |
19 | 硝酸盐,(以N计)(mg/L) | ≤2,0 | ≤5,0 | ≤20 | ≤30 | >,30 |
20 | 亚硝酸盐(以N计)(mg/L) | ≤0,001 | ≤0,01 | ≤0,02 | ≤0,1 | >,0,1 |
21 | 氨氮(NH4)(mg/L) | ≤0,02 | ≤0,02 | ≤0,2 | ≤0,5 | >,0,5 |
22 | 氟化物,(mg/L) | ≤1,0 | ≤1,0 | ≤1,0 | ≤2,0 | >,2,0 |
23 | 碘化物,(mg/L) | ≤0,1 | ≤0,1 | ≤0,2 | ≤1,0 | >,1,0 |
24 | 氰化物,(mg/L) | ≤0,001 | ≤0,01 | ≤0,05 | ≤0,1 | >,0,1 |
25 | 汞(Hg)(mg/L) | ≤0,00005 | ≤0,0005 | ≤0,001 | ≤0,001 | >,0,001 |
26 | 砷(As)(mg/L) | ≤0,005 | ≤0,01 | ≤0,05 | ≤0,05 | >,0,05 |
27 | 硒(Se)(mg/L) | ≤0,01 | ≤0,01 | ≤0,01 | ≤0,1 | >,0,1 |
28 | 镉(Cd)(mg/L) | ≤0,0001 | ≤0,001 | ≤0,01 | ≤0,01 | >,0,01 |
29 | 铬(六价)(Cr6+)(mg/L) | ≤0,005 | ≤0,01 | ≤0,05 | ≤0,1 | >,0,1 |
30 | 铅(Pb)(mg/L) | ≤0,005 | ≤0,01 | ≤0,05 | ≤0,1 | >,0,1 |
31 | 铍(Be)(mg/L) | ≤0,00002 | ≤0,0001 | ≤0,0002 | ≤0,001 | >,0,001 |
32 | 钡(Ba)(mg/L) | ≤0,01 | ≤0,1 | ≤1,0 | ≤4,0 | >,4,0 |
33 | 镍(Ni)(mg/L) | ≤0,005 | ≤0,05 | ≤0,05 | ≤0,1 | >,0,1 |
34 | 滴滴滴(μg/L) | 不得检出 | ≤0,005 | ≤1,0 | ≤1,0 | >,1,0 |
35 | 六六六,(μg/L) | ≤0,005 | ≤0,05 | ≤5,0 | ≤5,0 | >,5,0 |
36 | 总大肠菌群(个/L) | ≤3,0 | ≤3,0 | ≤3,0 | ≤100 | >,100 |
37 | ≤100 | ≤100 | ≤100 | ≤1000 | >,1000 | |
38 | 总σ放射性(Bq/L) | ≤0,1 | ≤0,1 | ≤0,1 | >,0,1 | >,0,1 |
39 | 总β放射性(Bq/L) | ≤0,1 | ≤1,0 | ≤1,0 | >,1,0 | >,1,0 |