Table 3 Descriptive statistics of Foggia province groundwater variables
Parameter | Average | Median | Mode | Standard deviation | Minimum | Maximum |
|---|---|---|---|---|---|---|
pH | 7,22 | 7,18 | 7,00 | 0,24 | 6,79 | 7,93 |
Electrical conductivity (mS/cm) | 2,74 | 1,93 | 3,40 | 2,02 | 0,46 | 10,34 |
Total dissolved solids (TDS) (mg/l) | 1751 | 1236 | 2320 | 1290 | 294 | 6620 |
Dissolved oxygen (ppm) | 4,08 | 4,01 | 3,15 | 1,16 | 0,53 | 7,68 |
Na+ (mg/l) | 279 | 190 | 90 | 266 | 20 | 1450 |
Ca++ (mg/l) | 108 | 87 | 60 | 75 | 17 | 480 |
Mg++ (mg/l) | 45 | 35 | 20 | 35 | 8 | 240 |
K+ (mg/l) | 22,4 | 19,0 | 20,0 | 14,5 | 2,0 | 96,0 |
Chemical oxygen demand (COD) (mg/l) | 8,4 | 6,0 | 0,5 | 9,5 | 0,5 | 49,0 |
Cl- (mg/l) | 503,5 | 294,4 | 209,5 | 537,9 | 44,3 | 2765,9 |
NO3- (mg/l) | 8,9 | 4,7 | 0,2 | 12,2 | 0,2 | 67,0 |
SO42- (mg/l) | 102,2 | 70,3 | 48,0 | 99,0 | 7,3 | 632,2 |
HCO32- (mg/l) | 293,6 | 292,8 | 219,6 | 91,1 | 91,5 | 579,5 |
Vital organism 22°C (UFC/ml) | 101 | 44 | 12 | 162 | 1 | 1286 |
Vital organism 36°C (UFC/ml) | 100 | 46 | 16 | 160 | 1 | 1440 |