|   含水层  |       Na+  |       Ca2+  |       Mg2+  |       
  |       
  |       
  |       pH  |    
|   四含 (N = 10)  |       360~871 (659)  |       4~143 (69)  |       2~104 (47)  |       74~336 (195)  |       837~1247 (1070)  |       106~915 (457)  |       7.9~9.1 (8.6)  |    
|   煤系 (N = 14)  |       435~783 (564)  |       0.4~7 (4)  |       0.6~7 (3)  |       104~243 (164)  |       23~602 (228)  |       566~1233 (824)  |       8.1~9.1 (8.6)  |    
|   太灰 (N = 6)  |       858~943 (918)  |       97~148 (122)  |       87~144 (114)  |       268~307 (288)  |       1853~2060 (1978)  |       293~365 (337)  |       7.3~9.2 (8.5)  |