This document analyzes heavy metal contamination in the River Kabul in Pakistan and its impact on fish populations. Water and fish samples were collected from 9 sites along the river and tested for various heavy metals and physicochemical parameters. Results found elevated levels of zinc, copper, cadmium, lead, chromium, and manganese in water samples downstream of industrial and urban areas. Fish sampled from these sites also contained higher levels of heavy metals. Physicochemical testing of the water showed declining water quality. The study concludes the river water is unsuitable for drinking and irrigation due to heavy metal pollution from industries, and that heavy metal contamination poses risks to fish and human health. Recommendations include improving industrial wastewater treatment, reducing use of heavy