Table 3.

Results of detected organochlorine pesticide residues in drinking water samples with respect to distances to cocoa farm

Distance	0–15 m		16–30 m		Above 30 m		Total mean	WHO MRLs
Pesticides (µg l−1 )	Range	Mean ± SD	Range	Mean ± SD	Range	Mean ± SD	Mean ± SD
Lindane	ND	ND	ND–0.04	0.03 ± 0.01	ND	ND	0.03 ± 0.00	2.00 (Max)
α-Endosulfan	ND–0.03	0.03 ± 0.01	ND–0.03	0.02 ± 0.01	ND	ND	0.03 ± 0.00	0.01 (Max)
Dieldrin	ND–0.03	0.03 ± 0.00	ND	ND	ND	ND	0.03 ± 0.00	0.03 (Max)
p,p′-DDT	ND–0.03	0.03 ± −0.00	ND–0.05	0.04 ± 0.01	ND	ND	0.04 ± 0.01	2.00 (Max)
Endosulfan-sulfate	ND–0.04	0.03 ± 0.01	ND	ND	ND	ND	0.03 ± 0.01	0.01 (Max)
Heptachlor	ND–0.03	0.02 ± 0.01	ND–0.04	0.02 ± 0.01	< 0.01–< 0.01	<0.01	0.02 ± 0.00	0.03 (Max)

SD standard deviation and ND non-detected, Limit of detection = 0.01 µg/L, WHO MRLs World Health Organization maximum residue limit for pesticides in water