The sacred river that serves 500 million people faces a toxic crisis

Countries & Cities · Published 15 October 2026 Swipe more like this →

In short: The Ganges is more than just India's longest river; it is a lifeline for nearly half the nation. Yet, despite its spiritual status and massive infrastructure spending, the water remains dangerously contaminated, creating a public health emergency where water-borne diseases remain a leading cause of child mortality.

The scale of the Ganges' pollution is staggering. It flows through 100 cities with over 100,000 residents, and three-quarters of all sewage in the northern plains remains completely untreated before entering the water. Research from 2022 revealed that a mere 37% of the daily 72,368 million litres of produced sewage undergoes treatment. This domestic waste is compounded by industrial discharge; for instance, tanneries in Kanpur use toxic chromium compounds that now exceed recommended maximum levels by more than 70 times.

The environmental toll is visible in both chemistry and biology. In some tributaries like the Pandu River, copper concentrations are a thousand times higher than in uncontaminated water due to fly ash from coal plants. This creates a hazardous environment for wildlife: the endangered Ganges river dolphin faces habitat fragmentation from dams, while the vulnerable Ganges softshell turtle—a long-lived species at a high trophic level—is particularly susceptible to accumulating heavy metals.

The crisis is also one of hydrology and history. While an 1916 agreement recognized the right to uninterrupted flow, modern irrigation demands have diverted much of the river's base flow. To combat this, some experts propose constructing storage reservoirs with a capacity of 100 Tmcft to maintain a minimum environmental flow of 5,000 cusecs during the eight-month dry season. Without these measures, the river continues to struggle under the weight of industrial waste, agricultural runoff, and the disposal of human remains.

Public health consequences are immediate. Studies have linked the river's water to cholera, hepatitis, and dysentery, with some estimates suggesting a 66% incidence rate of water-borne diseases in certain areas. In cities like Varanasi, where 40,000 bodies are cremated annually, many remain only half-burnt due to high wood costs, further contributing to the river's organic load and ecological decay.

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