Aquatic Pollution and Coastal Management

Unit 4 : Pesticide pollution

4.3.Sources and Pathways of Pesticides
Anthropogenic activities provide the primary source of chlorinated hydrocarbon input into the aquatic environments.Chlorinated hydrocarbon enter the aquatic environment mainly by deliberate application or accidentally, while poly chlorinated biphenyls entry into the aquatic environment is indirect and principally accidental.

• Deliberate application – spraying of pesticides on agricultural crops, control of weeds, eradication of trash fish, etc.
• Dumping of waste/containers from public health agriculture and industrial usage
• Domestic and industrial effluents.
• Accidental spillage from agricultural and industrial sites, road and rail vehicles and ships
• Drainage and run – off from treated farm lands, garbage and industrial solid wastes dump
• Dumping of sewage sludge, municipal and industrial solid wastes
• Atmospheric input (dry deposition and precipitation) burning/incineration of domestic, municipal/industrial solid wastes; industrial emissions