Only One in Ten Ganges Stretches Showed Consistent Improvement

About 600 million people depend on the Ganges, and its basin generates more than 40% of India’s economic output. The river is also sacred to millions who believe bathing in it can bring salvation. Those roles make pollution more than an environmental problem: the river supports livelihoods and industry while carrying waste that threatens health and undermines the religious practices built around it.

In 2014, Narendra Modi made restoring the Ganges a central government priority. His administration launched Namami Gange to tackle sewage and toxic industrial waste, committing $4.5 billion to treatment plants and other infrastructure. More than a decade later, Bloomberg’s investigation combined nearly 2,000 kilometers of satellite analysis, reporting in key cities and independent water tests. Its broad finding is uneven progress: infrastructure has helped in some places, but pollution remains widespread, and only about one in ten river stretches showed consistent improvement in satellite data over the past decade.

Lou Del Bello, an editor at Bloomberg News, described the basic constraint: cities are growing quickly, making it harder to capture all the waste they produce. The government says it has made significant progress, while acknowledging that much remains to be done.

Haridwar offers one of the program’s stronger cases. Shruti Srivastava reported that the river there looks visibly cleaner than it did in 2015. The town has five sewage-treatment plants, and the government says every drain is connected.

Satellite analysis complicates that picture. Bloomberg tracked turbidity—the amount of light that can pass through the water—and found that parts of the river around Haridwar were becoming muddier in both pre- and post-monsoon seasons. The reporting linked year-round muddying to riverbed construction and sand mining. During major religious festivals, treatment facilities can also be overwhelmed: Srivastava cited a day when around 7.5 million people came to the river, a temporary surge that fixed infrastructure cannot readily accommodate.

Turbidity is only one indicator. Satellite images can track changes in turbidity, algae and water temperature, but they cannot measure chemicals, heavy metals, pathogens, dissolved oxygen or fecal coliform. A river may look clearer on satellite measures without being safe for people to use.

That distinction matters in downstream communities. Residents of Jana Village described skin lesions and stomach problems. One farmer, Ram Kishore Nishad, showed reporters nail deformities and said stomach trouble left him unable to eat properly. He also said pollution had damaged livelihoods: his family used to grow flowers, and he believed the polluted water had ended that work. He described how the village’s environment could affect marriage prospects when families came to consider an alliance.

In Kanpur, the investigation found evidence of both improvement and continuing discharge. The city’s largest drain—described as one of Asia’s largest—had been tapped or stopped from flowing into the river, a major government achievement. But more than a dozen other drains still released raw sewage, and residents told reporters some were opened at night to avoid scrutiny. The reporting team visited one drain around 8 p.m. and saw black water flowing directly into the river.

Kanpur’s satellite patterns also varied by season: the water showed some improvement in the pre-monsoon period but became muddier after the monsoon. At the same time, smaller factories were seen dumping waste through open drains. Kings International, a large leather exporter, said it treated wastewater on site before sending it to a treatment plant. Its managing director, Taj Alam, said the leather industry faced a stigma and was required to follow directions that did not apply elsewhere. The company’s account sits alongside the investigation’s observation of untreated discharges elsewhere in the city.

Independent sampling made the limits of visible progress concrete. Testing for Bloomberg by scientists at the Indian Institute of Technology Kharagpur found that Kanpur river water exceeded government standards for bathing. An irrigation channel used for agriculture showed severe pollution from treated tannery wastewater.

In Jana Village, a drinking-water well contained fluoride at 4.40 milligrams per liter, against a stated limit of 1.0, and nitrate at 98.33 milligrams per liter, against a limit of 45. The investigation noted that prolonged excessive fluoride exposure can damage bones and high nitrate can impair blood’s ability to carry oxygen. Professor Abhijit Mukherjee warned that arsenic in irrigation water can be taken up by crops and then consumed. Limited disease tracking, however, leaves the scale of health effects unclear.

Satellite trends around Varanasi were more consistently favorable for turbidity, even as the city urbanized. The contrast captures the program’s central tension: government investment can improve water conditions, while rapid urban growth adds pressure on sewage systems. Varanasi, Modi’s parliamentary constituency and a showcase for Namami Gange, has seen major investment and a transformed waterfront. Yet independent studies cited in the reporting found the water unsafe for human use. The government says it aims to make the Ganges fit for bathing by the 2029 election.

Some pollution is bound up with religious practice. Cremation ashes—and sometimes bodies—enter the river, while pilgrims and politicians may believe its sacred waters can cleanse any amount of waste. Vishwambhar Mishra said 40,000 to 50,000 people take a holy dip there each day. He described the difficulty of telling worshippers the river is unhealthy: “Ganga is not merely a river. For us, she is our mother.”

The pressures extend beyond what treatment plants can address. Shivanand Saraswati said sand removal had changed the river’s flow and removed habitat used by turtles to lay eggs. Reporting also described groundwater extraction as a compounding pressure on the water that feeds the river.

The government said it had fitted at least 249 treatment plants with real-time sensors to monitor compliance. A former government official, speaking anonymously, told Bloomberg that plant officials had repeatedly manipulated data to avoid fines. Water minister C. R. Patil denied the allegations, saying electronic, video and electricity monitoring would detect untreated releases. He also said pollution-related health concerns had disappeared or declined, and that patient tracking was the responsibility of state governments. The health ministry did not respond to requests for comment.

The government told Bloomberg it had achieved “a remarkable improvement in every stretch” and remained hopeful that newer treatment technology would make the river fit for bathing “for all” before the 2029 election. Yet only about half of the funds allocated to Namami Gange had been spent through 2025, and industries continued to flout pollution rules. Taken together, the reported growth, ongoing discharges and satellite trends suggest that local infrastructure gains have not yet translated into consistent improvement across the river.