Poor Oversight Of Contaminated Industrial Sites In India Poses Serious Public Health Risk, Warns Study

In a stark warning on the state of environmental governance in India, a new study has flagged that the absence of robust regulation and reliable data on contaminated industrial sites is exposing millions to long-term health risks, even as large tracts of polluted land remain unidentified and unmonitored.

The research, led by the University of Bristol and published in the journal Environmental Development, highlights a troubling gap between hazardous waste generation and the official recognition of contaminated sites in the country. It has called for urgent policy reforms, stronger monitoring systems, and better coordination among regulatory agencies to prevent a silent public health crisis.

“Contaminated sites are often invisible environmental problems. Pollutants may accumulate slowly in soil and groundwater, but the effects can last for generations if not properly managed,” said Jagannath Biswakarma, the lead author of the study. He pointed out that existing regulations remain fragmented across sectors, rendering them ineffective in addressing the scale and complexity of the problem.

According to various estimates, India generates an estimated 15.66 million metric tonnes of hazardous waste annually. Yet, the number of officially recorded contaminated or potentially contaminated sites remains fewer than 200. In contrast, countries with far smaller industrial footprints have significantly more comprehensive inventories. Switzerland, for instance, has nearly 39 times more recorded contaminated sites despite being vastly smaller in both size and industrial activity.

Researchers say this disparity suggests that a large number of polluted sites in India remain unidentified, raising concerns about unchecked exposure to toxic substances. These include heavy metals such as lead, cadmium, and mercury, along with industrial chemicals, petroleum by-products, pesticides, fertilisers, and dyes—many of which can persist in the environment for decades.

Over time, such contaminants can seep into groundwater, enter food chains, and accumulate in human and animal tissues, increasing the risk of chronic illnesses, including neurological disorders, cancers, and organ damage. The threat is particularly acute in densely populated areas, where industrial activity often coexists with residential settlements.

“Many contaminated sites are located in or near habitations, where pollution remains hidden but continues to pose risks for years,” said Kavitha Sambasivam of the Vellore Institute of Technology. She noted that the management of such sites currently falls under multiple regulatory domains, including soil protection, groundwater management, hazardous waste rules, and public health systems, often with little coordination between them.

This fragmented approach, the study argues, results in gaps in accountability and weak enforcement, allowing contamination to persist without adequate remediation. In the absence of a centralised database or systematic monitoring, policymakers and local authorities are often unable to assess the full extent of environmental and health risks.

To address these shortcomings, the researchers have proposed an integrated framework termed Contaminated Site Monitoring, Assessment, and Remediation (CS-MAR). The model advocates a comprehensive approach that includes nationwide identification and mapping of contaminated sites, centralised environmental data systems, risk-based prioritisation of clean-up efforts, and stronger inter-agency coordination.

The framework also emphasises community engagement and public transparency, enabling affected populations to access information and participate in monitoring efforts. Drawing on international examples such as the United States’ Superfund programme and regulatory models in Europe and Australia, the study suggests that India can adapt global best practices to strengthen its own systems.

However, researchers caution that policy transfer is not straightforward and must be tailored to local institutional and socio-economic conditions.

“Environmental governance systems differ widely between countries. Real progress will depend on institutional coordination, political commitment, and sustained investment in environmental monitoring,” said Asif Qureshi of the Indian Institute of Technology, Hyderabad.

The study also underlines the importance of building technical capacity and leveraging emerging technologies for environmental monitoring and remediation. Public-private partnerships, it suggests, could play a role in scaling up clean-up efforts and improving compliance.

At a broader level, the findings highlight the need to bridge the gap between scientific research, environmental data, and policy action. Developing a national inventory of contaminated sites, improving transparency, and strengthening regulatory oversight are seen as essential first steps.

The authors warn that failure to act could have long-term consequences not only for environmental sustainability but also for public health. “As pollutants continue to accumulate silently in ecosystems, the burden of disease linked to environmental exposure is likely to rise.”

Without urgent and coordinated intervention, contaminated industrial sites could become a major but under-recognised driver of health risks in India, warns the study.