Table 1.

Values and significance scores of the ANOSIM and ADONIS functions

Grouping of samples	ANOSIM		ADONIS
	R	p Value	F	p Value
Overall comparison based on the different water typesa (i.e., GW, SW, PW [g & s], and HTW [g & s])	0.356	0.001***	1.970	0.001***
Comparison of the different water types based on the source of the source water (i.e., groundwater vs. surface water)
Source water	0.643	0.001***	3.589	0.001***
Processed water	0.390	0.002**	1.734	0.036*
Household tap water	0.177	0.069	1.419	0.040*
Comparison of the different sampling periods (i.e., April vs. November)
Groundwater	0.232	0.109	1.292	0.100.
Surface water	0.694	0.026*	1.994	0.036*
Processed water (produced from GW)	0.185	0.144	1.255	0.069.
Processed water (produced from SW)	0.676	0.050*	2.053	0.032*
Household tap water (produced from GW)	−0.157	0.811	1.062	0.335
Household tap water (produced from SW)	−0.037	0.500	0.917	0.500

^aDifferent water types: GW, groundwater; SW, surface water; PW, processed water; and HTW, household tap water; g or s, originating from groundwater or surface water, respectively. Significance levels: 0 ‘***’ 0.001 ‘**’ 0.01 ‘*’ 0.05