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Table 3 Descriptive statistics of Foggia province groundwater variables

From: Source apportionment of groundwater pollutants in Apulian agricultural sites using multivariate statistical analyses: case study of Foggia province

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