Groundwater Quality Assessment in a Karst Coastal Region of the West Aurunci Mountains (Central Italy)

Table 4

Statistical summary of saturation indices of minerals in groundwater using PHREEQC. BEX index and some ionic ratios of interest in the study area.

Sample codes	Parameters	Calcite	Dolomite	Halite	Na/Cl (meq/l)	Cl/HCO3 (meq/l)	BEX (BEXd)
TUL	Minimum	-0.030	-1.250	-7.690	0.400	0.155	-1.393
	Maximum	0.440	-0.300	-6.880	0.942	0.553	1.083
	Mean	0.203	-0.752	-7.333	0.583	0.353	-0.012
	STD	0.134	0.269	0.306	0.164	0.126	0.810
TER	Minimum	0.450	-0.030	-6.560	0.410	0.588	-2.825
	Maximum	0.720	0.500	-6.490	0.433	0.628	-2.419
	Mean	0.585	0.235	-6.525	0.421	0.608	-2.622
	STD	0.191	0.375	0.049	0.016	0.028	0.287
MAZ	Minimum	-0.290	-1.770	-9.360	0.450	0.051	-0.028
	Maximum	0.530	0.530	-8.860	1.092	0.118	1.111
	Mean	0.229	-0.661	-9.058	0.751	0.077	0.565
	STD	0.216	0.571	0.142	0.171	0.015	0.250
CAP	Minimum	-0.180	-1.670	-9.490	0.533	0.065	0.047
	Maximum	0.600	0.220	-8.950	1.109	0.553	0.083
	Mean	0.229	-0.714	-9.204	0.772	0.428	0.065
	STD	0.201	0.504	0.137	0.155	0.205	0.010