Table 7 Example of WQI calculation...

Table 7

Example of WQI calculation

Parameter	WHO standard, S_n	1/S_n	∑ 1/S_n	K = 1/(∑ 1/S_n)	W_n = K/S_n	Ideale value, V₀	Estimated value, V_n	V_n/S_n	V_n/S_n × 100 = Q_n	W_n × Q_n
pH	8.5	0.1176	0.2451	4.0792	0.4799	7	6.55	0.300	30.00	14.40
EC	400	0.0025	0.2451	4.0792	0.0102	0	592	1.48	148.00	1.51
TDS	500	0.0020	0.2451	4.0792	0.0082	0	297	0.59	59.40	0.48
TH	500	0.0020	0.2451	4.0792	0.0082	0	311.1	0.62	62.23	0.51
Calcium ions	200	0.0050	0.2451	4.0792	0.0204	0	96.9	0.48	48.45	0.99
Magnesium ions	100	0.0100	0.2451	4.0792	0.0408	0	16.8	0.17	16.80	0.69
Sodium ions	50	0.0200	0.2451	4.0792	0.0816	0	4.37	0.09	8.73	0.71
Potassium ions	20	0.0500	0.2451	4.0792	0.2040	0	3.25	0.16	16.27	3.32
Bicarbonates	125	0.0080	0.2451	4.0792	0.0326	0	339	2.71	271.20	8.85
Chlorides	250	0.0040	0.2451	4.0792	0.0163	0	13.1	0.05	5.25	0.09
Nitrates	250	0.0040	0.2451	4.0792	0.0163	0	16.8	0.07	6.72	0.11
Sulfates	50	0.0200	0.2451	4.0792	0.0816	0	10.5	0.21	21.00	1.71

		0.245			1.0000					33.36

Parameter	WHO standard, S_n	1/S_n	∑ 1/S_n	K = 1/(∑ 1/S_n)	W_n = K/S_n	Ideale value, V₀	Estimated value, V_n	V_n/S_n	V_n/S_n × 100 = Q_n	W_n × Q_n
pH	8.5	0.1176	0.2451	4.0792	0.4799	7	6.55	0.300	30.00	14.40
EC	400	0.0025	0.2451	4.0792	0.0102	0	592	1.48	148.00	1.51
TDS	500	0.0020	0.2451	4.0792	0.0082	0	297	0.59	59.40	0.48
TH	500	0.0020	0.2451	4.0792	0.0082	0	311.1	0.62	62.23	0.51
Calcium ions	200	0.0050	0.2451	4.0792	0.0204	0	96.9	0.48	48.45	0.99
Magnesium ions	100	0.0100	0.2451	4.0792	0.0408	0	16.8	0.17	16.80	0.69
Sodium ions	50	0.0200	0.2451	4.0792	0.0816	0	4.37	0.09	8.73	0.71
Potassium ions	20	0.0500	0.2451	4.0792	0.2040	0	3.25	0.16	16.27	3.32
Bicarbonates	125	0.0080	0.2451	4.0792	0.0326	0	339	2.71	271.20	8.85
Chlorides	250	0.0040	0.2451	4.0792	0.0163	0	13.1	0.05	5.25	0.09
Nitrates	250	0.0040	0.2451	4.0792	0.0163	0	16.8	0.07	6.72	0.11
Sulfates	50	0.0200	0.2451	4.0792	0.0816	0	10.5	0.21	21.00	1.71

		0.245			1.0000					33.36