The 2,700-litre figure comes from the World Wildlife Fund’s accounting of the full water footprint of a single cotton garment, including the irrigation required for the cotton itself, the water used in dyeing and chemical treatment of the fibres, and the water consumed during fabric processing before the finished shirt reaches a retail rack. The figure is consistent across multiple authoritative sources and is now widely cited in academic and policy literature. The figure represents the volume required to produce one garment in the global average production environment. Garments produced in regions where cotton is irrigated by drip systems use less. Garments produced in regions where cotton is flood-irrigated, which remains the dominant practice in much of South and Central Asia, use more.
The 2,700-litre figure assumes a single T-shirt.
The same accounting framework gives approximately 9,000 to 10,000 litres of water per pair of jeans, approximately 25,000 litres per kilogram of cotton fibre, and approximately 125 to 150 litres per kilogram of fabric during dyeing and finishing alone. The pair of jeans is roughly the daily drinking water needs of 4,750 people.
Why a single garment needs so much water
Cotton is, by every available measurement, one of the thirstiest crops in commercial agriculture. The plant requires sustained irrigation through most of its growing cycle and is highly sensitive to salt, which restricts the kinds of water that can be used to grow it. Roughly 60 per cent of the total water footprint of a typical cotton garment is consumed before the cotton is even harvested.
The remaining 40 per cent is consumed at the textile-processing stage. After harvest, the cotton fibres are spun into yarn, woven into fabric, and then dyed, printed, treated, and finished. Each of these steps requires water both as a solvent and as a rinse medium. The 2018 Quantis International report on the global pollution impacts of the apparel industry identified dyeing and finishing as the single largest source of the industry’s water-related environmental impact, accounting for approximately 36 per cent of the total. Yarn preparation accounts for approximately 28 per cent. Fibre production accounts for approximately 15 per cent.
The water used in dyeing and finishing does not return to the local water system in the same condition it left. In Bangladesh, where approximately 1.5 trillion litres of water per year are used in garment factories and dyeing mills, the wastewater from textile processing is one of the largest single sources of industrial water pollution in the country. The same pattern holds in southern China, in Vietnam, in Turkey, and in the textile-processing regions of India and Pakistan. As Geographical Magazine set out in a 2026 review of the industry’s water footprint, the dyes, heavy metals, oils, phenols, and pesticide residues released by textile processing reach groundwater, agricultural irrigation systems, and the marine environment.
What it adds up to at industry scale
According to a 2019 analysis by the United Nations Conference on Trade and Development, summarised in coverage by United Nations News, the global fashion industry consumes approximately 79 to 93 billion cubic metres of fresh water annually, depending on the methodology of accounting. The figure represents approximately 4 per cent of global freshwater extraction. It is enough water, by the UN’s own framing, to meet the needs of approximately five million people for an entire year, or alternatively to fill approximately 32 to 37 million Olympic-sized swimming pools.
The same figure, taken alongside the global water-scarcity numbers, makes the analytical pivot direct. Approximately 2.2 billion people worldwide currently lack access to safe drinking water. The fashion industry’s annual water consumption, by either of the standard accounting frameworks, is sufficient on its own to provide every one of those 2.2 billion people with the World Health Organization’s minimum daily drinking water requirement for several decades.
The industry’s total emissions are equally striking. A 2018 announcement from the United Nations Framework Convention on Climate Change estimated total annual greenhouse gas emissions from textile production at approximately 1.2 billion tonnes of CO2-equivalent, which the announcement noted was more than the combined annual emissions of all international flights and maritime shipping. The same announcement projected that sector emissions could rise by more than 60 per cent by 2030 if the industry continued on its current trajectory.
Where the water is being drawn from
The water consumption is not evenly distributed across the planet. Cotton is grown in regions where it grows well, which in practice means hot, dry, and seasonally arid climates where irrigation is essential. The largest cotton-producing regions in the world include the Aral Sea basin in Uzbekistan, the Indus and Punjab regions of Pakistan, the Brahmaputra basin in northeast India, the Yangtze and Yellow River basins in China, and the Cotton Belt of the southern United States. Most of these regions are now classified as water-stressed by the World Resources Institute’s standard rating system. Several are in long-term decline.
The Aral Sea, once the world’s fourth-largest saline lake, has been documented by NASA’s Earth Observatory in serial satellite imagery since the early 1960s. In 1960, before the Soviet Union began the irrigation diversion project that has since become one of the most-studied environmental disasters of the twentieth century, the Aral Sea covered approximately 68,000 square kilometres. The lake was fed by two major rivers, the Amu Darya and the Syr Darya, which descended from the mountains of Central Asia. The Soviet authorities diverted both rivers to irrigate cotton plantations in what is now Uzbekistan, Turkmenistan, and Kazakhstan. By 2007, the lake had shrunk to approximately 10 per cent of its original surface area. The exposed seabed, contaminated with the agricultural pesticides and fertilisers that had been washed downstream for decades, has become the Aralkum Desert. Approximately 40,000 to 60,000 fishermen lost their livelihoods. The autonomous Karakalpakstan region of northwestern Uzbekistan, which had drawn approximately half its economic activity from fishing and related industries, has not recovered.
The Aral Sea was destroyed for cotton. The cotton, in turn, was destined for textile processing in the same broad region, before being shipped onward to the global garment manufacturing centres in Bangladesh, Vietnam, and elsewhere. Some of the cotton was eventually turned into T-shirts that now sit in wardrobes across Europe, North America, and East Asia. The water that the Aral Sea once held is now in the air, in the soil, and in clothing that has, in many cases, already been discarded.
The microplastic and waste sides of the same industry
The water consumption is one of three distinct environmental costs the fashion industry produces at scale. The second is microplastic pollution. Approximately 500,000 tonnes of microfibres are shed into the ocean each year through the washing of synthetic clothing, by the UNCTAD figure cited in the same 2019 UN analysis. The figure is equivalent in mass to approximately 50 billion plastic water bottles, or approximately 3 million barrels of oil. The microfibres do not biodegrade. They have now been detected in fish, in seabirds, in commercial shellfish, in human placenta tissue, and in the human bloodstream.
The third cost is textile waste itself. As Earth.Org’s 2026 analysis of the industry’s environmental impact sets out, the global apparel industry now produces approximately 92 million tonnes of textile waste per year, with the figure projected to rise to approximately 134 million tonnes by 2030. Approximately 85 per cent of all textiles eventually end up in landfill or incineration. A substantial proportion of the discarded clothing from the wealthy world is shipped to the developing world. In Chile, the Atacama Desert has become a recognised destination for textile waste, with at least 39,000 tonnes of unsold or discarded clothing now sitting on the desert floor in the region around the port of Iquique. Satellite imagery has documented the textile mountain in successive years.
The acceleration of the past five years has been driven primarily by the ultra-fast-fashion business model pioneered by Shein and now followed by Temu and a growing number of imitators. Shein’s emissions, by the 2025 Fossil Free Fashion Scorecard, rose by approximately 170 per cent over the two-year period to 2024. The company now produces, by the same scorecard’s accounting, annual emissions comparable to those of a small developed country.
What the disclosure gap looks like
The figures cited above are the figures that the industry’s environmental impact can be estimated from publicly available data. The full footprint is, by every available assessment, larger.
Three specific gaps recur across the disclosure landscape. The first is the gap between the water used in primary production (cotton irrigation, textile dyeing) and the water used in the entire supply chain (transport, retail, consumer washing). Almost no corporate sustainability report includes the latter. The second is the gap between aggregated industry figures and facility-level figures. A company-wide annual water-consumption total reveals nothing about whether the company’s textile-processing plant in a drought-affected region of Bangladesh is straining the local groundwater. The third is the gap between the major brands that publish any environmental disclosures and the much larger number of mid-tier and ultra-fast-fashion brands that publish none. Shein, despite being one of the largest single fashion companies in the world by sales volume, did not begin publishing any environmental reporting until 2022 and has since been criticised by the Changing Markets Foundation and others for the partial nature of what it does publish.
The figures the academic and NGO literature has been able to produce are, in significant part, estimates of what the brands themselves have not been willing to publish.
What is at stake
The global fashion industry has been on a continuous growth trajectory for approximately twenty years. Clothing production roughly doubled between 2000 and 2014 and has continued to grow since. The average consumer in the developed world now buys approximately 60 per cent more clothing than they did fifteen years ago, and keeps each item for approximately half as long. The industry has, in the same period, been the subject of multiple UN reports, multiple academic analyses, and multiple high-profile journalistic investigations, all of which have set out the environmental costs in detail. The disclosures have not slowed the growth.
The 2,700 litres of water in a cotton T-shirt is not, in the abstract, an enormous quantity. The total global production of cotton garments is, on the current accounting, more than 50 billion items per year. The 79 billion cubic metres of fresh water the industry consumes annually is the cumulative figure produced when each individual T-shirt is multiplied by the scale of global demand.
The drought-affected regions where the cotton is grown are not getting wetter. The wastewater systems in the textile-processing regions are not getting cleaner. The proportion of synthetic fibres in global clothing has risen from approximately 3 per cent in 1960 to approximately 68 per cent today, which means the microplastic shedding from washing is rising rather than falling.
The T-shirt is small. The aggregate is not.
