Water Sources Quality in Urban Slum Settlement along the Contaminated River Basin in Indonesia: Application of Quantitative Microbial Risk Assessment

Table 3

Heavy metal concentrations from all types of water sources.

	Concentration in ng/gr (mean ± SD)
	Al	Mn	Cu	As	Pb
Borehole ()	5 ± 5	187 ± 287	4.5 ± 5.2	0.5± 0.2	0.2 ± 0.4
Dug well ()	47 ± 79	368 ± 497	3.4 ± 7.6	0.5 ± 0.5	0.2 ± 0.5
Spring ()	7	36	1.4	0.1	0
River ()	1374	552	4.7	0.8	1.2
Indonesian guideline for clean water	200	500	1000	50	50
WHO guideline for drinking water	200	500	1000	10	10