Agricultural activities are one of the main income sources in Bangka Regency, but this activity also provides a dilemma for environmental conservation. Oil palm plantation activities always use fertilizers and pesticides, leaving organic contamination in the waters. Cases of poisoning against pesticides, especially organophosphate groups, have been widely reported. To avoid that preventive measures are required, so we must know the water quality and pollution load that contained in the water around the area of oil palm plantations. This study aims to monitor water quality based on chemical parameters (DO, BOD, COD, nitrate and phosphate levels), and the presence of pesticide residues in the waters around oil palm plantations in Bangka Regency. The results showed waters around oil palm plantations in Zed meet mild to moderate pollution (3.21-4.95 mg/L) based on DO parameters, meet class II water quality standards for BOD (2.37-2.68 mg/L), COD criteria (8.7-11.4 mg/L), nitrate (0.985 mg/L) and phosphate (<0.0313 mg/L). Waters around oil palm plantations in Sempan meet moderate pollution based on DO parameters (3.59-3.78 mg/L), and meeting the class II water quality standards for the criteria of BOD(2.37-2.47 mg/L), COD (8.68-9.56 mg/L), nitrate and phosphate. The results did not found any pesticide organophosphate residue.