The impact of sewage effluents on water quality of Lake Hawassa, Ethiopia

BMC Chemistry

Table 6 The mean, maximum (Max), minimum (Min) and the associated standard deviation (SD) values corresponding to the various physicochemical parameters measured in water samples from four different areas of Lake Hawassa in wet seasons

Parameter		Sample Site				Parameter		Sample Site
Parameter		Tikur Wuha	Haile Resort	Gudumale	Hiteta	Parameter		Tikur Wuha	Haile Resort	Gudumale	Hiteta
EC	Mean	137.3	137.7	137.8	137.2	Cu	Mean	0.326	0.330	0.320	0.033
	SD	0.8	0.1	0.1	0.1		SD	0.01	0.01	0.009	0.005
	Min	136.0	137.5	137.5	137.1		Min	0.31	0.31	0.31	0.03
	Max	138.5	137.9	137.9	137.2		Max	0.34	0.34	0.34	0.04
TRB	Mean	11.7	22.8	12.1	19.2	K	Mean	28.9	9.4	9.2	25.0
	SD	0.2	0.7	0.2	0.1		SD	0.6	0.2	0.08	1.7
	Min	11.5	21.0	11.9	19.1		Min	28.0	9.0	9.1	23.0
	Max	11.9	23.2	12.3	19.3		Max	29.5	9.5	9.3	27.0
T	Mean	25.3	24.3	24.2	22.9	Fluoride	Mean	4.08	5.19	4.19	7.42
	SD	0.1	0.1	0.3	0.2		SD	0.008	0.08	0.01	0.08
	Min	25.1	24.2	23.4	22.7		Min	4.07	5.11	4.17	7.30
	Max	25.4	24.4	24.4	23.2		Max	4.09	5.32	4.20	7.50
TDS	Mean	87.8	88.3	88.3	98.8	Nitrite	Mean	0.007	0.018	0.016	0.005
	SD	0.4	0.1	0.1	0.8		SD	0.001	0.002	0.005	0.001
	Min	87.4	88.2	88.2	98.0		Min	0.006	0.015	0.011	0.004
	Max	88.5	88.4	88.4	100		Max	0.008	0.020	0.027	0.006
pH	Mean	9.3	9.3	9.2	9.1	Nitrate	Mean	1.62	79.2	89.2	39.3
	SD	0.1	0.04	0.1	0.1		SD	0.08	0.7	1	0.09
	Min	9.1	9.2	9.1	9.0		Min	1.5	78	87	39.2
	Max	9.4	9.3	9.4	9.2		Max	1.7	80	90	39.4
Fe	Mean	0.064	0.064	0.062	0.015	Sulfate	Mean	11.3	17.7	18.1	6.2
	SD	0.01	0.005	0.01	0.001		SD	0.2	0.3	1.3	1.2
	Min	0.04	0.06	0.05	0.013		Min	11.1	17.3	17.0	5.0
	Max	0.08	0.07	0.08	0.017		Max	11.5	18.0	20.0	8.0
Mn	Mean	0.58	0.61	0.61	0.66	Phosphate	Mean	0.23	0.24	0.24	0.28
	SD	0.11	0.08	0.08	0.10		SD	0.01	0.01	0.01	0.04
	Min	0.4	0.5	0.5	0.5		Min	0.21	0.23	0.23	0.24
	Max	0.7	0.7	0.7	0.8		Max	0.24	0.25	0.24	0.38
Cr	Mean	0.031	0.030	0.026	0.020
	SD	0.007	0.009	0.005	0.004
	Min	0.02	0.02	0.02	0.015
	Max	0.04	0.04	0.03	0.029

ISSN: 2661-801X