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

Table 1

Rotated matrix with four components and characteristic parameters. Data from [21].

Parameters	Components
	1	2	3	4
Mg^2+	.874	.063	.072	.139
Ca^2+	.811	.231	−.045	−.043
Na^+	−.143	.188	.870	.271
Cl^−	.353	.707	.206	−.051
HCO3^−	.572	.095	.699	−.091
SO4^2−	.030	.872	.074	.237
F^−	.067	.145	.150	.956
Explained variance	37.433	20.260	12.694	10.770
Cumulative % of variance	37.433	57.693	70.386	81.156