When Water Turns into Poison

Ali Nawaz Rahimoo

Tharparkar: Water — the most essential ingredient of life — is under severe strain in Tharparkar, Sindh’s arid desert district. Already crippled by chronic scarcity, Thar now faces an even deadlier challenge: the contamination of its limited groundwater sources. This deepening crisis threatens not only public health and livelihoods but also the fragile desert ecosystem that sustains over 1.6 million people.

A Dry Land of Dependence

Spread across nearly 20,000 square kilometres, Tharparkar’s landscape is vast, barren, and almost entirely devoid of rivers or canals. With an average annual rainfall of just 100–300 millimetres, its people have always depended on underground water drawn from wells and aquifers.

But today, that very source of life has become unsafe. Scientific studies reveal alarming levels of fluoride, arsenic, lead, mercury, and selenium — all exceeding the World Health Organization (WHO) safety standards.

A recent study by Mehran University of Engineering and Technology detected excess fluoride in eight out of nine test sites and unsafe arsenic levels in several others. Fluoride concentrations reached as high as 49 mg/L — nearly 50 times the WHO limit of 1.0 mg/L — while arsenic levels far exceeded the safe threshold of 0.01 mg/L.

Such exposure can cause dental and skeletal fluorosis, kidney failure, and irreversible bone deformities, especially among children.

The problem isn’t new. A 2010 joint study by Dow University of Health Sciences (DUHS), Pakistan Council for Scientific and Industrial Research (PCSIR), and local NGO AWARE (Association for Water, Applied Education & Renewable Energy) found that over 80 percent of Thar’s groundwater was unfit for human consumption. AWARE’s earlier analysis (2003–2008) revealed that more than half of Thar’s population used water with total dissolved solids (TDS) exceeding 5,000 mg/L, with one village, Naroowari, recording a shocking 20,000 mg/L — far above the WHO limit of 1,500 mg/L.

Broken Promises of Clean Water

In response, the Sindh Public Health Engineering Department and other government programmes installed thousands of reverse osmosis (RO) and ultrafiltration (UF) plants across the province, with Tharparkar hosting the largest number.

Yet, the ground reality remains grim. Only about 101 RO plants are currently functional, while hundreds have broken down due to poor maintenance, lack of spare parts, or irregular power supply.

For most households, the failure of these plants has meant little change. Women and children still walk long distances to fetch water from deep wells, often waiting hours as the levels recede. Many continue to drink untreated, contaminated water because nearby filtration units have been abandoned.

The Human Cost of Neglect

In Vohari village, a mother of three named Soni shares her daily ordeal:

“We drink from the same well our animals use. My children often suffer from stomach illness, and I have constant pain in my joints.”

Her story echoes across Thar, where groundwater — once a lifeline — has turned into a slow poison. Health workers confirm that fluorosis, once rare, is now spreading across multiple union councils, while kidney and skin diseases are rising sharply.

Another resident, Marvi, from Village Khayari, located about 20 kilometres from Chachro, describes a similar struggle:

“We still walk more than 30 minutes to collect water from the only dug well. When the water level drops, we wait three or four hours for it to refill. We have been nomads for centuries — nothing has changed.”

The Human Fingerprints

While Thar’s geology naturally contains high fluoride, experts warn that the presence of arsenic, mercury, and lead suggests an added human cause. Environmentalists suspect that coal-mining operations, industrial waste, and poor disposal practices may be polluting the aquifers.

With the Thar Coal Project expanding, independent and transparent water testing has become critical to determine the extent of industrial contamination — and to hold polluters accountable.

What Needs to Be Done

Experts and activists are calling for both immediate relief and long-term solutions to prevent a full-blown humanitarian disaster. Their recommendations include:

• Emergency access: Expand water trucking, mobile filtration units, and household filters while non-functional plants are repaired.
• Public health response: Launch medical screenings for fluorosis and heavy-metal exposure and raise awareness about safe water practices.
• Accountability and regulation: Enforce environmental safeguards on industries and ensure transparency in all public water projects.
• Sustainable solutions: Promote rainwater harvesting, solar-powered filtration, managed aquifer recharge, and community-led maintenance instead of short-term, one-off installations.

Government commitment: Develop “sweet water” aquifers, invest in defluorination and desalination plants, and ensure reliable oversight of existing infrastructure.

A Test of Governance and Humanity

Tharparkar’s thirst is more than a natural crisis — it is a test of governance, accountability, and political will. Decades of neglect and poorly managed interventions have left one of Pakistan’s most vulnerable regions exposed to a preventable catastrophe.

If decisive and community-driven action is not taken, Thar’s silent suffering will only deepen — one poisoned well at a time.

But with genuine political commitment, innovation, and people-led solutions, this tragedy could yet become a story of resilience and renewal — a reminder that water is not a privilege, but a fundamental human right.

The writer is a social development professional based in Umerkot Sindh. He can be contacted on anrahimoo@gmail.com. 

The article is the writer’s opinion, it may or may not adhere to the organization’s editorial policy.