In a world where clean water is becoming an increasingly scarce resource, wastewater treatment is no longer a “nice-to-have”—it’s mission-critical. At Climate Angels, we’re always looking for startups solving climate challenges through deep tech, strong execution, and scalable models. That’s exactly what we saw in Indra Water, and why we invested in their Series A round alongside marquee names like Emerald Technology Ventures, Peak Sustainability Ventures, and Mela Ventures.
What Indra Water Does
Indra Water (officially Inphlox Water Systems Pvt. Ltd.) is tackling one of India’s most overlooked environmental issues: inadequate wastewater treatment. The startup has developed modular, decentralized treatment systems that combine physio-electrical processes—like micro-electrolysis, oxidation, flocculation, and disinfection—into a compact, containerized unit. These systems are highly scalable, require no chemicals for primary treatment, and operate at significantly lower energy and space requirements compared to conventional plants.
This is not just tinkering at the margins—it’s a leap forward. Indra’s plug-and-play systems effectively replace 9 traditional stages of Effluent and Sewage Treatment Plants (ETP/STP), slashing operational costs by 40%, CapEx by 25%, and land usage by up to 90%. That’s a game-changer in urban India, where space constraints and infrastructure backlogs are chronic pain points.
The Opportunity: Why We Invested
India’s water crisis is not hypothetical. With only 28% of wastewater treated and projections suggesting over 20 cities could run out of groundwater by 2030, the need for smart, efficient treatment solutions is urgent. Indra is directly positioned to address this.
Here’s what sealed the deal for us:
Massive Market, Low Penetration:
The Indian wastewater treatment market is estimated at $4 billion, with over 90% of it dominated by unorganized players. Most existing infrastructure is either outdated or non-functional. Indra’s modular systems provide a viable alternative in the under-2 MLD (million liters/day) category, where nimbleness and adaptability matter more than scale.IP-Driven Technology with a Clear Moat:
Indra’s core process is patented, including innovations around dynamic wastewater treatment and energy-efficient electrochemical reactors. The startup also offers a proprietary monitoring dashboard with predictive maintenance—cutting downtime by 50% and enabling real-time troubleshooting. That’s a level of control and intelligence traditional systems just can’t match.Validated Traction, Blue-Chip Clients:
With 8 commercial deployments, over 30 pilots, and more than 750 million liters of water already treated, Indra has moved beyond proof-of-concept. They’ve landed deals with Unilever Indonesia (1.6 MLD), Aditya Birla Group, and the Taj Mahal Palace Hotel. That’s the kind of traction you want to see before deploying capital.Compelling Unit Economics and Business Model Flexibility:
Indra operates across three revenue streams: direct equipment sales, “Indra Go” (Water-as-a-Service via rentals), and long-term O&M contracts. This gives them strong recurring revenue potential and diversified risk.Mission-Aligned Founders with Cross-Disciplinary Expertise:
Co-founders Amrit Nayak and Krunal Patel bring technical depth, entrepreneurial experience, and strong domain understanding. Their backgrounds in clean energy and prior ventures in IoT/software show in the company’s thoughtful product design and emphasis on monitoring and automation.
The Bigger Picture
India’s regulatory environment is shifting fast. The government is mandating Zero Liquid Discharge (ZLD) norms for industries and pushing urban utilities to upgrade STPs to meet CPCB standards. Municipalities and private players alike are searching for modular, scalable, and compliant solutions.
This is where Indra shines—offering faster setup, lower life-cycle costs, and regulatory compliance in a box. Their systems are future-ready for both residential/commercial installations and high-load industries like textiles, pharmaceuticals, and food processing.
Looking Ahead
Of course, this is a tough category. Long sales cycles and risk-averse industrial buyers make scaling a challenge. But with funding in place to ramp up demo units, build out sales teams, and double down on product development, Indra is well-positioned to capitalize on its early momentum.
We’re excited to partner with a startup that not only fits our climate thesis but also brings a refreshing combination of deep tech, frugality, and ambition to a sector long overdue for disruption.
As water becomes one of the most contested resources of the 21st century, we believe Indra Water will be one of the companies ensuring it’s not wasted.
