Assessment of organochlorine pesticide residues in soils and drinking water sources from cocoa farms in Ghana

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Table 2 Result of detected organochlorine pesticide residues in soil samples

Sites	Nkrankwanta (S1)		Diabaa (S2)		Krakrom (S3)		Kwakuanya (S4)		Total mean	US MRLs
Pesticides (mg kg⁻¹)	Range	Mean ± SD	Range	Mean ± SD	Range	Mean ± SD	Range	Mean ± SD	Mean ± SD
Lindane	ND–0.03	0.03 ± 0.00	ND	ND	ND–0.04	0.04 ± 0.00	ND–0.05	0.05 ± 0.00	0.04 ± 0.01	0.04 (Max)
Dieldrin	ND	ND	0.02–0.03	0.02 ± 0.00	ND–0.02	0.02 ± 0.00	0.01–0.03	0.02 ± 0.01	0.02 ± 0.00	0.02 (Max)
Beta-HCH	ND–< 0.01	<0.01	ND–0.03	0.03 ± 0.00	ND–0.05	0.05 ± 0.00	ND–0.04	0.04 ± 0.00	0.03 ± 0.01	0.03 (Max)
p,p′-DDT	ND–0.02	0.04 ± 0.02	ND–0.02	0.02 ± 0.00	ND	ND	ND–0.03	0.03 ± 0.00	0.03 ± 0.01	0.05 (Max)

SD standard deviation, ND not-detected, limit of detection = 0.005 mg/kg, US MRLs United States maximum residue limits for pesticides in agricultural soils