Fluoride in the Serra Geral Aquifer System: Source Evaluation Using Stable Isotopes and Principal Component Analysis

Table 2

Cluster central scores, dominant components and hydrochemical groups. Data from [21].

Component	Cluster
	1	2	3	4	5	6	7	8	9
CaMg	1.614	−0.613	−0.228	0.511	−0.152	−0.724	2.042	−0.722	−1.720
SO4	0.987	4.411	−0.377	−1.198	−0.113	9.303	−0.236	−0.260	−0.348
Na	−0.892	3.032	−0.881	−0.667	−0.305	−0.845	1.092	1.653	2.691
F	−0.330	−1.357	1.244	6.986	−0.250	2.849	0.285	−0.034	4.786
Cases	22	2	19	3	212	2	11	36	2
Hydrochemical group	CaMg	SO4Na	F	F	Meteoric	SO4F	CaMg	Na	NaF