Water: The Biggest Business Challenge of the Next Decade

In 1993, when Spans Envirotech commissioned its first effluent treatment plant, water was a cost management problem. Today, for a significant and growing proportion of Indian manufacturers, water is a production continuity problem — and within a decade, it will define competitive advantage in ways that most organisations are only beginning to understand.

Three forces are converging simultaneously: physical water scarcity that is accelerating faster than most models predicted; a regulatory environment that is tightening with increasing enforcement muscle; and a global supply chain signalling from major brands that water stewardship is no longer optional for suppliers. Any one of these forces would justify serious management attention. Together, they make water the single most consequential operational challenge for Indian manufacturers over the next decade.

The Physical Reality: Water Stress Is Not Hypothetical

India's water situation is well-documented but poorly internalised by most corporate decision-makers. According to the World Resources Institute's Aqueduct Water Risk Atlas, 54% of India faces high to extremely high water stress. Major industrial states — Gujarat, Rajasthan, Haryana, Maharashtra, Karnataka, Andhra Pradesh — are in the high-to-extremely-high stress category. These are not projections for 2050; they are the current assessed condition.

The groundwater decline data is starker. India extracts approximately 250 cubic kilometres of groundwater annually — more than any other country — and recharges far less. In industrial districts across north and west India, water table depths that were 30 metres twenty years ago are now 80–120 metres. Borewell yields that supported 100 KLD extraction are declining to 40–50 KLD. Industrial plants that installed borewells in the 1990s assuming permanent supply are now running multiple borewells, paying for deepening, and supplementing with water tankers at ₹150–300/m³ — versus ₹5–20/m³ from their original borewell.

The consequences for manufacturing are already visible. Food processing plants in Maharashtra and Gujarat are reporting 20–30% reduction in borewell yields over the past decade. Textile dyeing units in Rajasthan and Tamil Nadu are increasingly dependent on municipal water supply with less predictable reliability and higher cost. Pharmaceutical companies with water-intensive API processes are discovering that water allocation from MIDCs and industrial estates is being reduced as the overall water balance in the region tightens.

Climate change amplifies these trends. Monsoon variability is increasing — more intense rainfall over shorter periods, longer dry seasons, and less groundwater recharge from more impermeable urban surfaces. The Himalayan glaciers that feed perennial rivers in North India are in accelerating retreat. The projections consistently show that industrial water stress in India will worsen materially through 2035, regardless of what regulatory or efficiency interventions are implemented.

The Regulatory Wave: ZLD Is Coming for Every Sector

India's environmental regulators have moved from paper compliance to enforcement. The National Green Tribunal, given expanded power and a more active bench since 2015, has issued hundreds of orders related to industrial water pollution — many resulting in production shutdowns. CPCB's online monitoring (OCEMS) infrastructure is being extended to more industries. State PCBs are staffing up environmental officers and pursuing compliance more actively, partly in response to NGT scrutiny of their own performance.

The regulatory direction on ZLD is unmistakable. CPCB currently mandates Zero Liquid Discharge for distilleries, tanneries, textile dye houses, and sugar mills. The NGT has expanded ZLD requirements across multiple river basins and industrial clusters. State PCBs — particularly in Maharashtra, Tamil Nadu, Karnataka, and Gujarat — are imposing ZLD as a Consent to Operate condition for pharmaceutical, food processing, and chemical units, especially in water-stressed areas and near sensitive water bodies.

The pattern is consistent and accelerating: a sector escapes ZLD mandates for several years, a high-profile pollution incident or NGT case triggers scrutiny, and ZLD conditions start appearing in CTO renewals across that sector. Distilleries experienced this cycle from 2010–2016. Textile dyeing units in Maharashtra and Tamil Nadu experienced it from 2015–2020. Pharmaceutical units are currently in the early phase of this cycle. Food processing, particularly dairy and large food manufacturers, will likely enter this cycle within 3–5 years in water-stressed states.

The companies that will navigate this transition best are those building ZLD capability now — before closure notices, rather than in response to them. The CAPEX required to install ZLD as part of a planned expansion is typically 25–35% lower than retrofitting ZLD onto an existing plant under regulatory pressure and compressed timeline.

The Supply Chain Signal: Your Customers Want Data

The third force is quieter but equally powerful: global consumer goods companies are embedding water stewardship requirements into their supplier qualification processes. Unilever's Sustainable Living Plan, Nestlé's Responsible Sourcing Standard, Danone's carbon and water commitments, and Walmart's Project Gigaton all include supplier water performance requirements. For Indian manufacturers supplying these companies, water stewardship is moving from a nice-to-have to a supplier qualification criterion.

The ask is specific: water consumption data (volume per tonne of product), wastewater treatment compliance records, water reuse rates, and in some cases, third-party verification of water management systems. Suppliers who cannot provide this data — or whose data reveals high water consumption and low reuse — face the prospect of losing customer qualifications over a 3–5 year horizon.

India's largest FMCG and food manufacturers — Hindustan Unilever, Nestlé India, Britannia, ITC, Marico — have adopted their own water targets for manufacturing operations and are extending these requirements down their supply chains to ingredient and co-manufacturing suppliers. The certification question "do you have a CPCB-compliant ETP and what is your specific water consumption per unit of production?" is increasingly standard in supplier audits.

The Cost Equation Is Changing

The financial case for industrial water investment is improving every year as the cost of water inaction rises. Consider the economics for a 500 KLD food processing plant in a water-stressed Maharashtra district:

• Current freshwater cost: ₹30/m³ (borewell + treatment); ₹15 lakh/month
• Projected freshwater cost in 5 years (declining borewell yield + tanker supplementation): ₹60–80/m³; ₹30–40 lakh/month
• ZLD investment: ₹8–15 crore for RO + MVR system
• Water recovery from ZLD: 92–96% → freshwater requirement reduces from 500 KLD to 20–40 KLD
• Water savings value at ₹60/m³: (460 KLD × ₹60 × 365) = ₹10 crore/year
• Payback period: <2 years on water savings alone, before regulatory risk value

This arithmetic is not unusual in water-stressed industrial districts. The problem is that many corporate finance teams are still modelling water at today's cost rather than forward projecting — systematically undervaluing water investments compared to energy investments, where forward electricity pricing is more commonly incorporated into ROI calculations.

The full risk-adjusted financial case for ZLD also includes the value of regulatory risk avoided. A production shutdown from CPCB/SPCB non-compliance at a 500 KLD plant generating ₹200 crore/year in revenue costs far more per day than the annualised capital cost of ZLD compliance. Framing ZLD as both a cost and risk management decision — rather than purely as an environmental cost — changes the conversation with CFOs and boards.

What Manufacturers Should Do Now

The appropriate response is not to wait for regulatory force, or to treat water investment as a compliance checkbox. The manufacturers who will be best positioned through 2035 are those taking the following actions now:

• Conduct a water audit. Map every water input and output in your plant. Most manufacturers significantly underestimate their total water withdrawal once all streams (process, cooling, boiler, cleaning, domestic) are counted. A water balance reveals the highest-volume reuse opportunities.
• Assess your regulatory exposure. Review your Consent to Operate for existing ZLD conditions. Assess whether your location, effluent type, or sector is in the regulatory trajectory for ZLD mandates. A ZLD feasibility study costs a fraction of a compliance crisis.
• Design for ZLD readiness, even if you don't implement ZLD today. If you are investing in a new ETP or expanding capacity, design the civil and electrical infrastructure to accommodate future ZLD addition. Allocate plot space for evaporators. Size secondary treated water TDS below 1,500 mg/L to reduce future RO and evaporation costs. This costs <5% more at design stage and can save 40–60% of retrofit cost later.
• Implement water reuse from your existing ETP. Even without ZLD, many ETPs can provide treated water for cooling tower makeup, boiler makeup, or toilet flushing with modest tertiary upgrades. This immediately reduces freshwater withdrawal and demonstrates water management progress to customers and regulators.
• Start measuring and reporting. Implement water meters on all major usage points. Track specific water consumption (m³/tonne of product) as a KPI. Report to management monthly. What gets measured gets managed — and data collected now will be needed for customer ESG reporting requirements within 2–3 years.

The Competitive Opportunity

There is a contrarian framing of the water challenge that deserves mention: for manufacturers who invest proactively in water management, the next decade presents a competitive opportunity. As the field thins — as suppliers who cannot demonstrate water stewardship lose customer qualifications, as plants that haven't achieved ZLD compliance face regulatory shutdown — the manufacturers who have built resilient water infrastructure will capture market share.

This is not speculation. It has already played out in the energy transition, where manufacturers with established renewable energy procurement and energy efficiency programs have lower power costs, better ESG ratings, and stronger customer relationships than peers who moved later. The water transition will follow the same arc — with the difference that water stress is physically irreversible in ways that energy scarcity is not.

The conversation around water in Indian industry is shifting from "how do we comply cheaply?" to "how do we build water resilience as an operational asset?" The companies that complete that transition first will be better manufacturers — more reliable, more sustainable, and more aligned with where global supply chains are heading. That is the opportunity that the next decade offers.