Assessment of the Nutrients in the Leachate and the Groundwater Quality for Drinking and Farming around the Nkolfoulou Landfill in Yaoundé, Cameroon

Table 4

Physicochemical characteristics of groundwater in the long dry season.

Parameter	Sampling point													Mean	SD
	T (°C)	23.5	23.4	23.5	23.4	23.6	23.5	23.3	23.4	23.4	23.5	23.4	23.5			23.5	23.5	0.08
pH	5.8	6.1	5.3	5.6	5.4	5.3	5.2	5.2	5.4	5.6	5.9	6.0	5.9	5.6	0.32
EC (μS/cm)	100	100	40	30	110	90	30	30	130	100	80	30	100	75	37
TDS (mg/L)	40	40	20	10	50	40	10	10	60	40	40	10	40	32	17
Turbidity (NTU)	8.3	0.7	1.3	1.3	12.6	0.9	9.4	0.7	3.2	2.2	4.6	0.8	3.3	3.8	3.9
TSS (mg/L)	59.43	5.00	9.29	9.29	90.00	6.43	67.14	5.00	22.86	15.71	32.5	7.00	23.21	27.14	27.75
TH (mg/L)	26.00	24.09	26.89	33.64	34.21	21.51	16.42	39.45	49.16	36.84	16.02	32.61	22.01	29.14	9.61
TA (mg·/L)	33.3	23.8	29.3	28.5	38.0	19.0	28.5	36.1	90.3	47.6	19.0	33.3	23.8	34.7	18.5
(mg/L)	2.54	2.42	1.90	0.48	0.48	0.53	6.97	2.67	22.83	5.66	1.84	2.59	1.93	4.07	5.95
(mg/L)	2.29	1.86	1.52	1.55	2.70	0.70	3.90	2.58	5.71	2.60	2.01	2.71	1.88	2.46	1.24
(mg/L)	2.87	3.03	1.12	0.66	3.80	0.20	2.34	3.40	6.05	0.61	2.35	3.36	2.27	2.47	1.59
(mg/L)	5.69	4.65	8.92	12.39	7.43	8.29	2.72	10.19	9.71	13.75	2.54	7.52	5.07	7.61	3.44
(mg/L)	0.12	0.03	0.02	ND	0.02	0.02	0.51	0.22	0.26	0.05	0.07	0.29	0.08	0.14	0.15
(mg/L)	0.63	1.27	3.04	4.25	3.57	2.53	7.18	3.77	11.76	3.02	2.38	2.06	3.41	3.76	2.88
(mg/L)	0.04	0.06	0.03	0.04	0.05	0.03	0.02	0.05	0.03	0.03	0.07	0.05	0.08	0.04	0.02
(mg/L)	0.22	0.67	0.51	0.42	0.34	0.52	0.45	1.80	0.95	3.72	1.26	1.81	0.53	1.02	0.97
(mg/L)	0.17	3.26	1.21	1.77	0.73	0.48	0.87	3.22	0.24	0.61	0.87	1.61	1.54	1.28	1.01
(mg/L)	ND	0.03	ND	ND	ND	0.01	0.02	ND	ND	ND	ND	ND	ND	0.02	0.01
(mg/L)	40.6	29.0	35.7	34.8	46.4	23.2	34.8	44.0	110.1	58.0	23.2	40.6	29.0	42.3	22.6
WQI	69.27	14.40	19.02	16.61	87.59	17.10	114.50	36.65	53.44	26.39	43.43	40.16	36.92	44.27	30.28
SAR	0.22	0.21	0.16	0.04	0.04	0.05	0.75	0.18	1.41	0.41	0.20	0.20	0.18	0.31	0.38

ND = not detected; SD = standard deviation.