Imagine a textile mill in Gazipur on an ordinary morning. Orders are confirmed, workers are on the floor and the machines are ready. Yet the production manager is watching a different gauge: the depth from which the factory must pump water.

The pump has to work harder than it did a year earlier. Electricity costs rise. Nearby residents complain that their shallow wells yield less water.

Nothing in the factory has technically broken. But its operating environment has.

This is the emerging business of water security in Bangladesh. Industrial growth, especially in textiles, dyeing, washing, leather, food processing and pharmaceuticals, depends on reliable water. Apparel alone earned USD 39.35 billion in exports in FY2024-25, up 8.8% from the previous year, according to BGMEA data. Yet the resource behind much of that production is still managed as if it were unlimited.

Experts at a WaterAid-TBS roundtable in November 2025 said groundwater in Gazipur, the country’s main manufacturing hub, was falling by 2-3 metres a year. The rate varies across locations and aquifers, but the business signal is clear: factories are drawing from a shared reserve faster than existing governance can manage it.

A HIDDEN INDUSTRIAL SUBSIDY

For years, an industrial user could largely treat groundwater as free. The factory paid for the tube well, pump, electricity and treatment, but not for the resource itself or the depletion imposed on other users.

That is a hidden subsidy. It lowers private production costs while shifting part of the bill to households, farmers, future factories and public authorities. When a community must drill deeper or buy water, the factory’s balance sheet does not record that cost.

The government recognised the distortion in 2025. At an AmCham dialogue, then water resources adviser Syeda Rizwana Hasan said an industrial water policy was being developed to assign costs to groundwater use. However, the World Bank’s January 2026 appraisal for the Metro Dhaka Water Security and Resilience Programme said pricing and enforcement tools were still absent, while the draft policy remained under consultation.

This gap matters because technology will struggle to compete with an underpriced resource. A factory will not readily invest in advanced recycling if pumping fresh groundwater remains cheaper, simpler and weakly monitored.

EFFICIENCY IS NOT ENOUGH

Bangladesh’s factories have shown that substantial savings are possible. By 2024, the IFC-led Partnership for Cleaner Textile had worked with more than 450 textile and garment factories, helping reduce freshwater use by 35 billion litres and wastewater discharge by 29 billion litres annually.

Those gains matter, but efficiency is not the same as conservation.

A factory may use less water for each kilogram of fabric while expanding total production. If water use per unit falls by 20% but output rises by more than 25%, total water use still increases. Sustainability reports that publish only water intensity can therefore show improvement while total extraction rises.

Factories and regulators need to track both water used per unit of output and total annual withdrawal. Without the second number, Bangladesh cannot know whether industrial growth is becoming genuinely less dependent on groundwater.

SCARCITY IS ALSO POLLUTION

Bangladesh is not only running short of water. It is losing usable water through pollution.

The World Bank estimated in 2026 that more than 7,000 factories in greater Dhaka generate about 2,400 million litres of industrial effluent a day, much of it discharged untreated into rivers and canals. It placed the combined environmental, health and economic cost of river pollution in Dhaka at $2.83 billion a year.

This creates a damaging loop. Polluted rivers become too costly or unsafe to use, so factories pump more groundwater. Greater pumping deepens depletion, while untreated discharge further destroys the surface-water alternative.

An effluent treatment plant does not automatically break that loop. It may treat wastewater for discharge without returning it to production. The World Bank also found that many factories either did not operate their treatment plants or used them intermittently amid weak enforcement. Compliance should therefore be measured by how much wastewater is treated, reused and independently verified, not simply whether a factory owns an ETP.

Apparel alone earned USD 39.35 billion in exports in FY2024-25, up 8.8% from the previous year, according to BGMEA data. Yet the resource behind much of that production is still managed as if it were unlimited.

THE REUSE CASE

Recent work suggests reuse is technically possible at meaningful scale.

A 2024 peer-reviewed study at a denim facility in Manikganj tested treated wastewater in dyeing and washing. It estimated that full reuse could save about 619,230 cubic metres of groundwater a year at that facility while meeting fabric-quality requirements used by North American and European buyers.

A separate SMEP-funded pilot reported in February 2026 that a modular plant at Zaber & Zubair Fabrics could recycle up to 85% of textile wastewater. The project estimated operating costs of $0.12-$0.30 per cubic metre for 70% recycling and brine management, while a plant processing 100 cubic metres an hour could require $0.9-$2 million in capital.

Those figures explain why adoption is uneven. Large exporters may finance such systems and recover costs through lower pumping, treatment and compliance risks. Smaller wet-processing units may lack the capital, technical staff or certainty of long-term orders.

The hardest part is managing the concentrated brine, chemicals and salts left behind. Full zero-liquid discharge is possible but remains energy-intensive and expensive. Reuse is therefore not a machine that can be bought and forgotten. It requires maintenance, skills, monitoring and a viable outlet for residual waste.

Rainwater harvesting can help with cleaning, cooling, toilets, landscaping and groundwater recharge. But rainfall and water availability vary sharply between the monsoon and dry seasons. A factory needs adequate roof area, storage and treatment to turn rainfall into a dependable source. It should be part of a water portfolio, not a substitute for efficiency and reuse.

FROM FACTORY TO AQUIFER

Water security cannot be solved factory by factory when hundreds of users draw from the same aquifer.

A highly efficient plant remains exposed if neighbouring factories pump without limits. A recycled-water system cannot protect a production cluster if pollution makes every nearby river unusable. The relevant unit of management is therefore the aquifer, river catchment or industrial cluster.

The World Bank’s 2026 programme proposes groundwater-stress assessments, allocation rules, licensing, monitoring and pricing, alongside a blended-finance facility for effluent treatment and reuse. This is stronger than relying on voluntary corporate projects because it links individual investment to a shared water budget.

Bangladesh should require large industrial users to install tamper-resistant meters and disclose total withdrawal, discharge and reuse. Charges should reflect local water stress rather than one flat national rate. New industrial capacity should be approved only after assessing whether the cluster has sustainable water and treatment capacity.

For smaller factories, common treatment and reuse infrastructure may be more practical than separate advanced plants. Public finance can absorb early infrastructure costs, but factories should pay transparent service fees linked to the volume and pollution load they generate.

Buyers also have a role. Global brands cannot demand lower water use and traceable wastewater while squeezing supplier prices and shortening contracts. The SMEP pilot proposed an experimental 1% retail surcharge and verified “water credits” to help finance upgrades. The model is unproven, but it raises the right question: who should pay for standards that benefit the whole supply chain?

It estimated that full reuse could save about 619,230 cubic metres of groundwater a year at that facility while meeting fabric-quality requirements used by North American and European buyers.

A NEW OPERATING RISK

Water security should now sit beside energy, gas, logistics and foreign exchange in factory planning.

Every large water user needs a water balance, stress-tested against deeper pumping, higher prices, dry-season shortages and stricter discharge rules. Banks should examine a borrower’s water source and reuse plan before financing expansion. Buyers should ask for absolute withdrawal data, not only efficiency claims. Regulators should protect household drinking water before allocating scarce groundwater to industrial growth.

The risk is not that Bangladesh will suddenly have no water. It is that reliable, clean and affordable water will disappear first where industrial demand is most concentrated.

A factory can have workers, machinery and orders and still become a stranded asset if its water source fails. Businesses that understand this early will not treat recycling as charity or compliance. They will treat it as protection of production itself.