Everyone’s talking about AI eating up electricity. Almost nobody’s talking about what it’s doing to water.
India just hosted a massive AI summit in Delhi, Google and Amazon and Microsoft are pouring tens of billions into data center parks across Vizag, Hyderabad and Chennai, and quietly, in the background, a completely different set of companies is getting ready to profit from the mess this creates. Not chipmakers. Not cloud providers. Water treatment companies.
Here’s the problem in one line: India has 18% of the world’s population, only 4% of its usable freshwater, and it’s now building some of the thirstiest digital infrastructure on the planet on top of that shortage. Here’s the opportunity in one line: someone has to build the plants, membranes and recycling loops that make this sustainable, and a handful of listed Indian companies are already doing exactly that, with order books to prove it.
I’ve spent the last few weeks going through order books, concall transcripts and annual filings of five listed Indian water companies — VA Tech Wabag, Ion Exchange India, Enviro Infra Engineers, Denta Water & Infra Solutions, and EMS Ltd. This piece breaks down where each one stands today, why this theme matters right now, what the bulls and bears are both getting right, and where the real risk sits.
Why This Topic Matters Right Now
Four things are converging at the same time, and that’s rarely a coincidence worth ignoring.
Market trend. Water infrastructure stocks in India have quietly outperformed broader infra names over the past year, with order book growth running well ahead of revenue growth across the sector — a classic early sign of a demand cycle building faster than execution capacity.
Industry trend. India’s water and wastewater treatment market is projected to grow at a CAGR somewhere between 10% and 17% through the early 2030s, with some estimates putting the total addressable market above $40 billion by 2032. That’s not a niche theme anymore.
Government policy. Jal Jeevan Mission, AMRUT, and Namami Gange continue to push municipal water and sewage spending, while the Union Budget 2026-27 added a tax holiday until 2047 for foreign cloud providers building data centre infrastructure in India — a policy combination that’s fuelling both sides of this story: more water demand from AI infrastructure, and more government-funded water treatment supply to manage it.
Investor interest. Retail and institutional interest in this basket has visibly picked up in 2026, with order win announcements now moving stock prices by 5-25% in a single session — something that barely happened in this sector three years ago.
Put together, this isn’t a story that needs AI hype to work. It was already working because of municipal spending. AI and data centers are simply adding a second, faster-growing demand layer on top of an existing structural trend.
Key Data Snapshot
| Metric | Value |
|---|---|
| India’s share of world population | ~18% |
| India’s share of world’s freshwater | ~4% |
| India’s data centre water use, 2024-25 | ~150 billion litres |
| Projected data centre water use, 2030 | ~358 billion litres |
| Indian data centre capacity, 2020 vs 2025 | 0.4 GW → 1.5 GW (4x growth) |
| Additional data centre capacity expected by 2030 | 8-10 GW |
| Water treatment market CAGR (India, through early 2030s) | ~10-17% |
| Combined VA Tech Wabag + Ion Exchange order book (FY26) | ~₹43,600-45,500 crore |
| Enviro Infra order book growth, FY26 | +242% YoY |
| Share of Indian data centres in water-stressed regions | Over 50% |
These numbers are the backbone of the entire thesis. A country with almost no freshwater buffer is simultaneously building out municipal water infrastructure and hyperscale AI data centres. Both need the same underlying expertise: treatment, recycling, and zero liquid discharge.
Why AI And Data Centres Are Suddenly A Water Story
A single 100 MW hyperscale data centre can guzzle around 20 lakh litres of water a day just for cooling. Industry estimates put India’s total data centre water consumption at roughly 150 billion litres in 2024-25. By 2030, that number could more than double to around 358 billion litres, as AI-focused facilities keep coming up across Mumbai, Chennai, Hyderabad, Bengaluru and Noida — cities that already fight for water every summer.
More than half of India’s data centre capacity sits in regions already classified as water-stressed. Some studies suggest 60-80% of Indian data centres could face high water stress this decade.
Here’s the part that matters for investors: every hyperscaler now needs ultra-pure water for cooling loops, zero liquid discharge systems to avoid regulatory trouble, and recycled wastewater to keep its “water-positive” promises to shareholders. Someone has to build and run all of that. That someone is the water treatment industry.
Add to this India’s existing municipal push, plus semiconductor fabs, green hydrogen plants and solar manufacturing units that all need industrial-grade water treatment, and you get a genuine multi-year infrastructure cycle.
That’s the backdrop. Now let’s get into the actual stocks, and then into the deeper analysis around them.
TOP WATER STOCKS
VA Tech Wabag — The Global Heavyweight
Wabag is the one company on this list that genuinely operates like a multinational, not just an Indian EPC contractor.
The numbers from FY26 are hard to ignore. Consolidated revenue came in at roughly ₹3,940 crore for the year, up nearly 20% year-on-year, with profit after tax jumping to around ₹370 crore, a 26% increase. Full-year EBITDA margin held at 13.3%. That’s not spectacular on paper, but for an EPC business, steady margin discipline matters more than one big quarter.
The order book is where the story gets interesting. Wabag closed FY26 with a backlog of about ₹17,200-17,235 crore, up roughly 26% year-on-year. That works out to more than 4 times FY26 revenue — well above the company’s own internal comfort threshold of 3x. Order intake in the March quarter alone touched ₹7,500 crore.
What makes this backlog attractive isn’t just size. Around 38% of it now comes from long-duration operations and maintenance contracts, which behave more like annuity income than one-time construction revenue. That’s a meaningful shift, because O&M work smooths out the lumpiness that typically plagues EPC stocks.
Geographically, Wabag runs projects across 25-plus countries, with a near-even split between India and international markets. Recent order wins in Kuwait, the UAE and Georgia show the company picking up desalination and sewage treatment contracts in the Middle East and Africa — regions where water scarcity is even more acute than India’s.
Management is also positioning for the AI wave directly. Brokerage notes following the Q4 results specifically flagged rising opportunities for Wabag in semiconductors, solar PV manufacturing, green hydrogen and AI-driven data centres, where ultra-pure water requirements create real technical barriers to entry.
The company has stayed net cash positive for six straight years, a rare trait in Indian infrastructure. It’s also branching into Bio-CNG, with a first plant coming up in Ghaziabad and plans for up to 100 more.
The catch: the stock isn’t cheap. It trades at a trailing P/E north of 23-25x, compared to an industry average closer to 15-18x. The market has already priced in a lot of the good news, so execution now needs to match expectations exactly, quarter after quarter.
Ion Exchange India — Diversified But Under Pressure
Ion Exchange is the oldest and most diversified name here. It runs three segments — engineering (EPC and water treatment plants), chemicals (resins and specialty chemicals), and consumer products (household water purifiers).
FY26 wasn’t a clean year. Consolidated operating income grew about 7% to roughly ₹2,915 crore, but EBITDA fell close to 29% year-on-year, with margins compressing to around 7.2% from a much healthier level a year earlier. Net profit for the year came in near ₹143 crore.
The engineering order book, though, tells a more encouraging story. It stood at roughly ₹26,400-28,300 crore as of the year-end and subsequent quarters, giving strong multi-year revenue visibility.
What went wrong on margins? Two things, mainly. Legacy engineering projects signed at thinner pricing continued to weigh on profitability, and the company’s new greenfield resin manufacturing plant at Roha, Maharashtra — a roughly ₹450 crore investment — is still ramping up capacity utilisation. Management expects utilisation near 25% only by FY27, with a payback period of four to five years.
There’s a silver lining worth noting. The consumer products division, which sells household and institutional water purifiers, grew revenue by around 28-34% in recent quarters, even as it continues posting losses. If that business scales toward breakeven, it changes the profitability mix meaningfully.
Ion Exchange has also tied up with global membrane technology player MANN+HUMMEL to manufacture ultrafiltration and membrane bioreactor components locally — components that are exactly what’s needed for advanced industrial and data centre water recycling systems.
The bottom line: Ion Exchange has scale, a wide client list including NTPC, Reliance and Unilever, and manufacturing depth that few peers can match. But near-term margins are under real strain, and the stock needs the Roha facility and consumer business to start pulling their weight before the earnings story turns convincing again.
Enviro Infra Engineers — Fast Growth, Fresh Diversification
Enviro Infra is the newer, scrappier name in this group, focused heavily on government-funded sewage and wastewater treatment plants under Namami Gange and similar schemes.
FY26 revenue rose about 7.5% to roughly ₹1,146 crore, with a healthy EBITDA margin near 24% and PAT margin close to 16%. Consolidated net profit came in around ₹188 crore.
The headline number, though, is the order book explosion — up 242% year-on-year to roughly ₹6,814 crore. Recent large contracts include projects from Bihar Urban Infrastructure Development Corporation and Maharashtra Industrial Development Corporation, plus a fresh ₹130 crore sewage treatment plant order from UP Jal Nigam in Varanasi in early July 2026.
What’s genuinely new here is the pivot into renewable energy. In its very first year in the segment, Enviro Infra picked up a 930 MWh battery energy storage system order from NTPC, acquired a wind EPC company with execution experience across 1,200 MW, and built an active renewable pipeline north of 1,700 MW. Management describes this as a deliberate de-risking move, spreading revenue across water, renewables and industrial infrastructure rather than depending on one government scheme.
It’s not risk-free diversification, though. Chasing BESS and wind EPC work outside its core competency adds execution complexity, and a cyber fraud incident during the year (with partial recovery of the stolen funds) is a reminder that smaller-cap companies often lack the internal controls of bigger peers.
Still, for investors wanting exposure to the fastest order-book growth in this basket, Enviro Infra stands out. The risk is naturally higher too — smaller balance sheet, working capital sensitivity to government fund disbursement timelines, and a business still proving itself outside water treatment.
Denta Water & Infra Solutions — Small, Profitable, Niche
Denta Water is the smallest and youngest listed name here, having gone public only in January 2025. Its speciality is groundwater recharge and irrigation infrastructure in Karnataka, built around large government schemes tied to Bengaluru’s wastewater reuse and the state’s Jal Jeevan Mission rollout.
FY26 revenue grew about 23% to roughly ₹250 crore, with net profit up 15% to around ₹61 crore. That’s a genuinely strong profit margin for a company this size, though Q4 alone saw EBITDA margin drop sharply to under 20% from over 30% a year earlier — a reminder that project-based revenue can swing hard quarter to quarter.
The order book stood at roughly ₹728 crore at year-end, close to 3 times FY26 revenue. That’s healthy coverage, though it’s a fraction of the scale that Wabag or Ion Exchange operate at.
Denta’s niche — groundwater recharge through recycled water — is unusual and genuinely relevant to the AI-water conversation. As data centres and industrial users draw more from local aquifers, recharge and recycling infrastructure becomes more valuable, not less. The company’s credit rating was reaffirmed at CARE BBB (Stable) in 2026, indicating a stable but not yet investment-grade-strong credit profile.
The obvious flip side: Denta is small, geographically concentrated in Karnataka, and dependent on a narrow set of government contracts. Any slowdown in state-level project approvals hits this stock harder than it would hit a diversified pan-India player.
EMS Ltd — Cheap On Paper, Painful In Practice
EMS had, honestly, a rough FY26. Standalone revenue fell to around ₹608 crore and consolidated revenue to ₹732 crore, both down roughly 36-37% year-on-year. Fourth-quarter revenue came in sharply below expectations, hurt by government permission delays, a new payment settlement system (SPARSH) that slowed fund releases, and election-related work stoppages in West Bengal.
Management was fairly candid on the earnings call about the shortfall, attributing a large chunk of it to unbilled work-in-progress — nearly ₹100 crore of inventory built up because project milestones couldn’t be completed and invoiced on time, not because the underlying demand disappeared.
The order book still stands at a reasonable ₹1,837 crore as of March 2026, with fresh wins including a ₹209 crore contract from UP Jal Nigam and a separate ₹103 crore sewer project in Varanasi that pushed the stock up nearly 17% in a single session. Management is targeting a recovery to around ₹1,000 crore revenue in FY27 and a long-term CAGR aspiration of 20-25% through 2030.
EMS positions itself differently from peers — it deliberately continues taking on complex sewer-laying work that larger competitors have moved away from in favour of simpler sewage treatment plant contracts. Management argues this is a genuine niche, since the company currently captures barely 1% of India’s pan-India urban water and sewerage market, leaving enormous room to grow even without diversifying into new sectors.
The concerns are real too. Promoter share pledging touched nearly 28% during the year before partial release, debtor days remain elevated at close to 193 days, and the stock has fallen over 30% in the past year. This is a name for someone comfortable with EPC-style volatility, not for someone looking for a smooth ride.
Deep Analysis: What’s Actually Driving This Sector
Growth drivers. Three forces are stacking on top of each other — municipal spending under Jal Jeevan Mission and AMRUT, industrial demand from semiconductor and solar manufacturing, and now AI data centre cooling and ultra-pure water needs. No single driver would have been enough on its own; together they’ve turned a slow-moving public-works sector into a genuine growth theme.
Industry tailwinds. Water scarcity isn’t a future risk in India, it’s a present condition. That means regulatory pressure on industrial users to adopt zero liquid discharge only goes one direction — stricter, not looser. Every large water-consuming industry, from textiles to data centres, is being pushed toward the exact solutions these five companies sell.
Competitive advantage. Scale and technology depth matter more than most investors assume. Wabag’s desalination and O&M expertise, Ion Exchange’s membrane manufacturing tie-up, EMS’s willingness to do disruptive sewer-laying work competitors avoid — each company’s edge is narrow but real, and none of these are easily replicated by a new entrant without years of execution track record and government pre-qualification history.
Market opportunity. EMS’s own management estimate is telling — the company captures barely 1% of India’s urban water and sewerage market. If that’s true for the smallest name in this basket, the addressable market for the sector as a whole is still in early innings, not late-cycle territory.
Future demand. Semiconductor fabs, green hydrogen electrolysers, solar PV manufacturing, and AI data centres all share one requirement most people don’t associate with “tech” — enormous, continuous, high-purity water supply. As India builds out these industries through the late 2020s, water treatment demand rises in lockstep, not as an afterthought.
Expert & Analyst Perspective
Brokerages tracking VA Tech Wabag, including ICICI Securities, have pointed to the company’s rising share of long-duration O&M contracts as a specific reason for improving revenue predictability and margin visibility, alongside its expanding exposure to semiconductors, green hydrogen and AI-driven data centres as newer, higher-margin opportunity areas.
On valuation, analyst commentary has flagged that Wabag’s trailing P/E sits meaningfully above both the broader industry average and the Asian water utilities benchmark, which is the central debate among institutional investors right now — whether the premium is justified by genuinely superior revenue visibility, or whether it’s running ahead of what near-term earnings can support.
Institutional interest in the space has been visible too. Prominent public shareholders have maintained multi-percentage stakes in Wabag through recent quarters, and order-win announcements across the sector have consistently triggered same-day analyst notes and price reactions, a sign that the sell-side community is actively re-rating this theme rather than ignoring it.
Bull Case
The bull case for Indian water stocks rests on a genuinely rare combination — a policy-backed, government-funded demand base that isn’t going anywhere, stacked with a brand-new, fast-growing private-sector demand source in AI infrastructure and industrial manufacturing.
Order books across this basket collectively run into tens of thousands of crores, providing multi-year revenue visibility that’s unusually strong for mid-cap industrials. Companies like Wabag have proven they can execute complex international projects while staying net cash positive, and companies like Enviro Infra are showing that order books can still grow at triple-digit rates even in a supposedly mature government contracting environment.
The AI angle adds a second growth vector on top of the municipal one. If even a fraction of the 8-10 GW of new Indian data centre capacity expected by 2030 needs dedicated water treatment and recycling infrastructure, that’s an entirely incremental revenue pool none of these companies had five years ago.
Bear Case
The bear case is just as real. This sector runs on government contracts, and government contracts run on government timelines — which means fund disbursement delays, election-related work stoppages, and slow bid evaluations can and do hit revenue without warning, as EMS’s FY26 painfully demonstrated.
Margins are also more fragile than the order book headlines suggest. Ion Exchange’s FY26 margin compression, despite a record backlog, shows that legacy pricing and capacity ramp-up costs can offset top-line growth for several quarters running.
Valuation is a live concern for at least one name. Wabag’s premium multiple leaves little room for disappointment, and any quarter that merely meets rather than beats expectations could trigger a sharp de-rating given how much good news is already priced in.
Finally, smaller names carry real concentration risk. Denta Water’s dependence on Karnataka and EMS’s elevated promoter pledging are exactly the kind of single-point vulnerabilities that can hurt a stock disproportionately compared to a diversified, larger peer.
Comparison Section
| Company | Growth (FY26) | Valuation Signal | Outlook |
|---|---|---|---|
| VA Tech Wabag | Revenue +20%, PAT +26% | Premium (~24-25x P/E vs ~15-18x sector) | Strong, but priced for perfection |
| Ion Exchange India | Revenue +7%, EBITDA -29% | Reasonable, earnings-constrained | Needs margin recovery to re-rate |
| Enviro Infra Engineers | Revenue +7.5%, order book +242% | Mid-cap growth pricing | High growth, higher execution risk |
| Denta Water & Infra | Revenue +23%, PAT +15% | Small-cap, niche premium | Profitable but scale-limited |
| EMS Ltd | Revenue -36% YoY (FY26 miss) | Deep value on trailing numbers | Recovery story, FY27 will be the test |
Future Catalysts
A few specific events could move each of these stocks meaningfully over the next few quarters.
Earnings. Q1 and Q2 FY27 results will show whether Ion Exchange’s margin recovery has begun, whether EMS’s promised revenue catch-up materialises, and whether Wabag can sustain its 15-20% revenue CAGR guidance without margin slippage.
AI adoption. Any large data centre operator publicly disclosing a water treatment contract with one of these companies would be a meaningful re-rating trigger, since it converts a theoretical opportunity into a bookable order.
Government contracts. Fresh Jal Jeevan Mission, AMRUT and Namami Gange tenders, along with state-specific data centre water policies, remain the single biggest recurring catalyst across this entire basket.
Acquisitions. Enviro Infra’s Suyog Urja wind EPC acquisition shows this sector is open to M&A-led diversification; further bolt-on deals, particularly around membrane technology or renewable energy, could reshape growth profiles quickly.
Industry expansion. Fresh environmental clearances for large data centre parks, along with new semiconductor and green hydrogen project announcements, will keep expanding the addressable market for ultra-pure water and zero liquid discharge contracts.
My Research & Opinion
My own read: this is a sector-level structural story, not a single-stock story. The five companies here sit at different points on the risk-reward curve — from Wabag’s premium-priced quality compounding to EMS’s beaten-down recovery bet — and the right approach is picking based on your own risk appetite rather than chasing whichever name had the biggest order win last week.
Investment Scenario Analysis
Best case. AI data centre buildout accelerates faster than current 8-10 GW estimates, state governments mandate water recycling for all new data centre approvals, and municipal spending under Jal Jeevan Mission Phase 2 continues uninterrupted. In this scenario, order books across the sector could re-rate meaningfully higher, with EPC-heavy names like Enviro Infra and Denta Water seeing the sharpest earnings upgrades off a smaller base, while Wabag consolidates its position as the default partner for large international and industrial clients.
Base case. Growth continues at roughly the pace seen in FY26 — steady order book expansion, occasional working capital hiccups, and gradual but uneven margin improvement. Wabag and Ion Exchange grow in line with management guidance, Enviro Infra’s renewable diversification adds some volatility but doesn’t derail growth, Denta Water stays a profitable niche play, and EMS recovers toward its FY27 revenue target without fully repairing its balance sheet concerns.
Worst case. Government fund disbursement slows further due to fiscal tightening, a broader economic slowdown delays both municipal and private infrastructure spending, and data centre investment cools if global AI capital expenditure growth decelerates. In this scenario, order books stay large on paper but conversion into billed revenue slows sharply, hurting smaller, less diversified names like EMS and Denta Water more than larger, internationally diversified players like Wabag.
Who Should Consider This
Long-term investors who want exposure to a multi-year structural theme — water scarcity plus AI infrastructure buildout — rather than a quick trade, and who can hold through the working-capital-driven quarterly volatility this sector regularly produces.
Growth investors comfortable paying up for visibility, for whom Wabag’s premium valuation and annuity-like O&M mix may justify the multiple, or who want early exposure to faster, smaller-cap order book growth in names like Enviro Infra.
Dividend investors should note this isn’t primarily an income basket — Wabag’s dividend has grown but still yields modestly, and most peers here reinvest heavily into growth rather than payouts. This sector works better as a growth allocation than a dividend one.
High-risk investors who understand EPC-style earnings volatility and are willing to underwrite recovery stories like EMS, where FY26 numbers look weak on the surface but the order book and management commentary suggest a turnaround is plausible in FY27.
This article is for informational and educational purposes only and does not constitute investment advice or a recommendation to buy or sell any security. Figures are based on company disclosures, exchange filings and public reporting as of early July 2026, and may have changed since. Please consult a SEBI-registered investment advisor and do your own research before making any investment decisions.
Frequently Asked Questions
- Which water stock has the strongest order book relative to its size?
Ion Exchange India’s engineering order book runs close to 9-10 times its annual engineering-linked revenue, though execution and margin delivery remain the real test. VA Tech Wabag’s order book, while smaller as a multiple, is far larger in absolute terms and better diversified geographically.
2. Are water stocks directly linked to AI data centre growth?
Yes, increasingly so, though currently mostly through VA Tech Wabag. Hyperscale data centres need ultra-pure water for cooling and zero liquid discharge systems for compliance, and Wabag has explicitly flagged data centres, semiconductors and green hydrogen as emerging high-margin opportunity areas. The other four companies remain primarily municipal and industrial plays for now.
3. What’s the biggest risk across this entire sector?
Working capital stress tied to government payment cycles. Delayed fund disbursement, permission bottlenecks, and election-linked disruptions have hit multiple companies in this list during FY26, EMS most visibly.
4. Is Denta Water a good pick for someone wanting exposure to smaller water companies?
It has strong margins and a differentiated groundwater recharge niche, but its small scale and Karnataka concentration mean it carries higher single-project and single-state risk than the larger, more diversified names.
5. How big is India’s water and wastewater treatment market expected to become?
Various industry estimates put the market growing at a CAGR between roughly 10% and 17% through the early 2030s, with some projections placing the total addressable market above $40 billion by 2032, driven by urbanisation, water scarcity, and government schemes like Jal Jeevan Mission and AMRUT.
6. Should I buy all five stocks together as a basket?
That depends entirely on your risk appetite and time horizon, and isn’t something a single article can decide for you. Each name sits at a different point on the risk-reward spectrum, from Wabag’s premium-priced stability to EMS’s higher-risk recovery setup, so it’s worth matching your allocation to your own comfort with volatility rather than buying the basket mechanically.
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