Par*		 Unit Fissured-karstic aquifer Karstic aquifer Porous aquifer
Max Min Mean SD Max Min Mean SD Max Min Mean SD
pH   8.3 7.2 7.5 0.2 7.9 7.3 7.6 0.2 8.0 7.5 7.8 0.2
Eh mV 428 317 381 30 391 354 369 13 398 328 367 26
T °C 22.5 21.2 21.8 0.3 22.3 21.3 21.8 0.3 22.4 21.5 21.9 0.3
EC µS 857 477 563 73 1319 407 810 293 1355 313 652 397
TDS mg/L 557 310 366 47 857 264 526 190 880 203 423 258
LDO mg/L 7.0 5.3 6.3 0.6 7.1 6.3 6.8 0.3 7.1 6.6 6.9 0.2
Ca mg/L 114.5 4.0 70.2 19.7 118.3 28.6 79.4 30.7 88.4 12.9 50.9 30.7
Mg mg/L 45.1 4.1 24.7 8.3 66.4 17.6 38.1 19.1 74.7 11.4 31.5 25.4
Na mg/L 117.6 1.1 10.7 26.1 74.9 3.4 27.0 21.5 96.5 4.0 36.6 33.4
K mg/L 2.4 0.3 0.8 0.4 4.0 0.8 1.3 0.9 2.1 0.5 1.1 0.7
HCO3 mg/L 465.7 259.8 341.6 44.7 500.9 252.5 357 80.4 532.1 172.3 311 154.9
SO4 mg/L 99.0 10.6 22.7 18.4 272.2 15.1 81.8 82.2 185.5 14.7 51.8 66.9
Cl mg/L 17.0 4.3 6.6 3.4 98.4 5.7 31.8 30.1 114.1 5.1 31.2 44.3
NO3 mg/L 10.6 0.2 3.6 2.8 41.0 1.8 14.0 12.8 23.0 0.1 10.8 7.6
F- mg/L 0.9 0.01 0.1 0.2 2.9 0.1 0.8 0.9 1.4 0.1 0.5 0.5
Li µg/L 10.0 0.8 2.7 2.5 47.9 2.5 12.2 13.0 25.4 2.6 10.7 7.9
Si mg/L 11.4 4.5 6.4 1.6 29.0 7.7 13.4 6.0 20.2 9.9 14.3 4.1
B mg/L 0.3 0.01 0.03 0.1 0.2 0.02 0.1 0.1 0.2 0.01 0.1 0.1
Al µg/L 10.0 0.7 1.6 1.9 2.7 1.2 1.6 0.4 2.8 1.1 1.8 0.6
Mn µg/L 4.4 0.3 0.6 1.2 3.6 0.04 0.8 1.2 16.7 0.1 3.9 6.4
Fe µg/L 69.1 0.2 3.9 14.2 2.3 0.4 1.3 0.6 15.9 0.8 4.4 5.8
Ni µg/L 8.7 0.1 1.5 1.8 2.3 0.1 1.1 0.7 31.7 0.01 5.4 12.9
Cu µg/L 1.8 <0.001 0.5 0.5 3.7 <0.001 0.7 1.0 0.9 <0.001 0.2 0.5
Zn mg/L 1.4 0.02 0.3 0.3 1.2 0.03 0.3 0.3 0.5 0.1 0.2 0.1
Se µg/L 8.0 0.3 1.1 1.6 2.3 0.3 1.1 0.8 2.4 0.2 0.7 0.9
Sr mg/L 4.3 0.1 0.4 0.9 26.2 0.3 6.1 8.4 1.9 0.2 1.0 0.5
Cd µg/L 0.1 0.003 0.02 0.03 0.1 0.002 0.02 0.02 0.02 0.001 0.01 0.01
As µg/L 1.8 0.2 0.5 0.4 2.1 0.3 1.1 0.5 2.3 0.3 0.9 0.7
Ba mg/L 0.3 0.02 0.03 0.05 0.18 0.03 0.09 0.06 0.13 0.02 0.05 0.02
Pb µg/L 1.3 0.02 0.19 0.3 1.7 0.02 0.2 0.5 0.1 <0.001 0.04 0.03
U µg/L 3.3 0.4 1.3 0.7 3.5 0.6 1.4 0.8 1.9 0.8 1.2 0.4
Na % 90.5 1.2 8.5 20.6 41.3 2.7 15.8 12.4 49.7 4.4 23.4 16.3
SAR meq/L 8.4 0.02 0.5 1.8 1.4 0.1 0.6 0.4 1.7 0.1 0.8 0.7
RSC meq/L 3.7 -1.8 0.1 1.1 1.5 -4.2 -1.3 1.9 2.3 -1.8 0.3 1.4
SSPP meq/L 62.6 -3.6 3.0 13.1 4.8 0.2 1.1 1.6 2.5 -5.5 -0.2 2.8
* Parameters
Table 5: Basic statistics of the chemical analysis and field parameters of groundwater samples in the three aquifers during wet season (SD means standard deviation, SAR is sodium adsorption ratio, RSC is residual sodium carbonate, SSPP is soluble sodium percentage possible).
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