Table 2.

Point estimates of correlations between fecal indicators and the proportion of contaminations obtained in the MST analysis of raw water samples.

Response 1	Response 2	Mean	Median	Std	2.5% CI	97.5% CI
WB-MST	DM-MST	-0.237	-0.228	0.187	-0.621	0.132
	LB-MST	-0.073	-0.066	0.192	-0.490	0.293
	E. coli	0.093	0.099	0.210	-0.356	0.482
	Enterococci	-0.339	-0.343	0.195	-0.702	0.046
	Coliforms	-0.174	-0.162	0.186	-0.572	0.180
DM-MST	LB-MST	0.763	0.762	0.076	0.621	0.905
	E. coli	0.050	0.047	0.102	-0.151	0.256
	Enterococci	0.158	0.154	0.109	-0.059	0.372
	Coliforms	0.400	0.398	0.082	0.239	0.560
LB-MST	E. coli	0.260	0.257	0.096	0.071	0.451
	Enterococci	0.093	0.093	0.111	-0.115	0.312
	Coliforms	0.398	0.393	0.080	0.239	0.554
E. coli	Enterococci	0.736	0.741	0.069	0.584	0.855
	Coliforms	0.540	0.541	0.082	0.372	0.691
Enterococci	Coliforms	0.536	0.539	0.089	0.339	0.693

The three MST library setups are: without background (WB-MST), with a local background (LB-MST), and background selected through clustering analysis (DM-MST). Mean, Median, Std, 2.5 and 97.5% Credible Intervals (CI) refer to respective posterior point estimates.