Bacteriological contamination of groundwater in relation to septic tanks location in Ashanti Region, Ghana

Figures & data

Figure 1. Study area.

Table 1. Bacterial loads in sampled boreholes (BH), closed wells (CW) and open wells (OW)

Latitudes	Longitudes	Borehole (BH)/open well (OW)/closed well (CW) number	Non-faecal coliforms (CFU/100 mL)	Salmonella (CFU/100 mL)	E. coli (CFU/100 mL)	Faecal coliforms CFU/100 mL)	Total coliforms (N/100)	Distances (m)
6.6598650	−1.5600850	BH1	12	1	0	1	13	12.02
6.6599464	−1.5607316	BH2	4	0	0	0	4	21.47
6.6601000	−1.5588450	BH3	12	1	0	1	13	11.93
6.6602080	−1.5614966	BH4	4	1	1	2	6	38.87
6.6609883	−1.5586033	OW1	12	6	2	8	20	29.14
6.6611400	−1.5633267	CW2	2	0	0	0	2	39.14
6.6613584	−1.5622016	CW3	7	2	0	2	9	32.52
6.6624265	−1.5591000	CW4	10	2	0	2	12	21.19

Table 2. Bacterial isolates in sampled water

Bacterial isolates	No. of OWs	No. of CWs	No. of Boreholes	%
E. coli	1	0	0	25
Faecal coliform	1	2	3	75
Non-faecal coliform	1	3	4	100
Salmonella	1	2	3	75

Figure 2. A graph showing the various bacterial contaminant counts in the well/boreholes.

Figure 3. Correlation graph of distance vs. E. coli.

Figure 4. Correlation graph of distance vs. faecal coliform.

Figure 5. Correlation graph of distance vs. non-faecal coliform.

Figure 6. Correlation graph of distance vs. total coliform.

Figure 7. Correlation graph of distance vs. salmonella.