Table 2.

Level of anions in well water samples.

Sample	Cl− (mg/L)	F− (mg/L)	NO2− (mg/L)	NO3− (mg/L)	SO42− (mg/L)	SO2− (mg/L)	SiO2− mg/L	PO43− (mg/L)
B	29.4 ± 0.40	0.2 ± 0.10	0.011 ± 1.0 × 10−2	b/d	36.0 ± 1.0	0.10 ± 0.01	11.2 ± 0.2	2.90 ± 0.2080
BB	5.0 ± 0.12	0.8 ± 0.06	0.013 ± 6.0 × 10−4	0.62 ± 1.5 ×10−2	7.0 ± 0.6	0.06 ± 0.005	24.0 ± 2.0	0.67 ± 0.0058
PM	12.0 ± 0.15	0.3 ± 0.00	0.016 ± 1.5 × 10−5	b/d	37.0 ± 0.6	0.03 ± 0.01	15.0 ± 0.6	4.10 ± 0.0608
BHA	13.4 ± 0.10	0.3 ± 0.10	0.004 ± 1.5 × 10−5	0.080 ± 0.010	35.0 ± 1.0	0.06 ± 0.0	18.0 ± 1.0	9.90 ± 0.1
BHB	14.2 ± 0.15	0.3 ± 0.10	b/d	0.140 ± 0.010	31.0 ± 2.0	0.07 ± 0.0	18.0 ± 0.6	16.00 ± 1.5275
BHC	28.8 ± 0.06	0.3 ± 0.10	0.001 ± 0.0	0.040 ± 0.010	35.0 ± 1.0	0.08 ± 0.005	18.0 ± 1.0	10.00 ± 2.0
BHD	28.8 ± 0.75	0.3 ± 0.00	0.027 ± 1.5 × 10−2	0.003 ± 0.010	17.0 ± 1.0	0.08 ± .01	17.0 ± 0.6	15.00 ± 0.577
BHE	0.2 ± 0.12	0.2 ± 0.12	0.017 ± 1.5 × 10−3	0.320 ± 0.010	3.0 ± 0.0	0.09 ± 0.01	14.8 ± 0.06	12.00 ± 1.0
BHF	12.0 ± 0.15	0.3 ± 0.10	0.063 ± 4.2 × 10−3	0.968 ± 0.004	3.0 ± 0.6	0.07 ± 0.0	5.9 ± 0.1	4.10 ± 0.1528
CP	18.0 ± 0.10	0.1 ± 0.00	0.020 ± 1.0 × 10−2	0.090 ± 0.010	22.0 ± 2.0	0.03 ± 0.01	1.3 ± 0.1	4.32 ± 0.0800
WHO Limit	250	1.5	3.000	50.000	500	N/A	30	–

Abbreviation: N/A, No standard available.