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How do industrial waste and agricultural runoff affect the Ganges River?

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Physical map showing the Brahmaputra and Ganges river basins and their drainage networks across northern India, Bangladesh, Nepal, Bhutan, Tibet (China), and Myanmar. The map uses color shading to indicate elevation, from the high Himalayas in brown and white to lowland plains in green, and marks major rivers, tributaries, glaciers, dams, irrigated areas, and regions subject to flooding. An inset locator map highlights the region within South Asia. — Ganges River The Brahmaputra and Ganges river basins and their drainage network.

Industrial waste and agricultural runoff are primary contributors to the severe degradation of the Ganges River.12

The impact of these pollutants is exacerbated by the fact that large volumes of the river's water are diverted for agricultural use, leaving insufficient flow to assimilate chemical and metallic waste. The consequences include:1

Toxicity and Contamination: The river contains high levels of toxic substances, including arsenic, cadmium, and chromium, alongside disease-causing bacteria.32
Environmental Degradation: Industrial effluents and chemical runoff from modern agricultural activities significantly lower water quality, threatening both human health and aquatic life.12

Protecting the health of the Ganges is a moral imperative, as the river is central to the lives and religious practices of millions. While past initiatives like the Ganga Action Plan were largely unsuccessful, current efforts under the Namami Gange program are working to improve water quality through sewage treatment infrastructure and ecological conservation.2