Table 1. P- values of general linear model for mixture distributions (PROC GLIMMIX) for water and biofilm samples.

		Trial	Drinking system type	Sampling point position
Water	HPC-22	0.2500	0.2864	-
	HPC-36	0.1652	0.7505	-
	Pseudomonads	0.3387	0.7855	-
	Bell counts	0.1056	0.0135	-
Biofilm	HPC-22	0.1012	0.0113	0.8107
	HPC-36	0.6337	<0.0001	0.1624
	Pseudomonads	0.1983	0.0122	0.8081
	Bacterial coverage	0.0061	0.0006	0.9410

Statistical significance with p<0.05