Quality and Safety of Rural Community Drinking Water Sources in Guto Gida District, Oromia, Ethiopia

Table 3

Risk level classification of rural community’s drinking water from unprotected and protected sources according to WHO [16].

Source	n	Total coliform				Faecal coliform
		0	1–10	11–100	>100	0	1–10	11–100	>100
Unprotected well (%)	8	0	0	87.5	12.5	12.5	37.5	50	0
Protected well (%)	8	0	12.5	87.5	0	25	62.5	12.5	0
Unprotected spring (%)	8	0	0	100	0	12.5	50	37.5	0
Protected spring (%)	8	0	25	75	0	37.5	62.5	0	0

Bacterial colonies <1, “very low risk”; 1–10, “low risk”; 11–100, “medium risk”; >100, “high risk” or “very high risk,” n: number of water samples analyzed.