What Enviro Infra Engineers does

Enviro Infra Engineers Limited (NSE/BSE: EIEL) is a Delhi-headquartered, publicly listed infrastructure engineering company that designs, builds, commissions, and operates water and wastewater treatment infrastructure across India. The company delivers six core product lines — Sewage Treatment Plants (STP), Water Treatment Plants (WTP), Common Effluent Treatment Plants (CETP), Sewerage Networks, Water Supply Schemes, and Zero Liquid Discharge (ZLD) systems — built around proprietary process know-how in Sequential Batch Reactor (SBR), Mixed Bed Biological Reactor (MBBR), High Rate Anaerobic Digestor (HRAD), and SCADA-enabled tertiary treatment with disinfection. Its installed footprint spans 710+ STPs, 165.68 MLD of WTP capacity, 4,778 km of pipeline, and coverage of more than 1,150 villages across 12 Indian states.

The business operates three primary revenue streams: one-time EPC contracts won through competitive government bidding (typically large multi-year construction projects), Hybrid Annuity Model (HAM) projects that generate 15-year annuity income alongside construction-phase revenue, and long-term Operations & Maintenance (O&M) services tied to commissioned assets. Customers are exclusively government bodies — state Jal Nigams, Urban Infrastructure Development Corporations, municipal entities, and central utilities such as NTPC — engaged under flagship national programs including Namami Gange, AMRUT 2.0, Swachh Bharat Mission 2.0, and Jal Jeevan Mission. Contract values disclosed in 2025-2026 range from ₹256.92 crore (HAM STPs in Varanasi) to ₹1,070 crore (NTPC BESS portfolio) to ₹972 crore (Maharashtra SBM 2.0).

Since its 2024 IPO, the company has executed a strategic diversification beyond municipal water/wastewater into renewable energy and energy storage. Through wholly owned subsidiary EIE Renewables Private Limited, EIEL acquired controlling stakes in Suyog Urja Limited (wind EPC, ₹311 crore, April 2026), Sunaxis Renewables, Vento Power Infra, and a 49% stake in Soltrix Energy Solutions, while securing NTPC Battery Energy Storage System awards totaling ₹1,070 crore (930 MWh). Leadership remains promoter-controlled by the Jain family (Chairman Sanjay Jain, Managing Director Manish Jain, Whole Time Director Ritu Jain) following the 2011 passing of founder Rajinder Kumar Jain.

Name

Enviro Infra Engineers

Legal name

Enviro Infra Engineers Limited

Website

https://eiel.in

Company type

Public

Founded year

2009

Operating status

Operating

Headcount range

1,001–5,000 employees

Short description

Enviro Infra Engineers Limited is a Delhi-based, publicly listed Indian EPC company that designs, builds, and operates sewage treatment plants, water treatment plants, CETPs, and sewerage networks for state and central government clients across 12 Indian states, with recent expansion into battery energy storage and wind EPC.

Ownership category

akta.pro rank

Product category

Water and Wastewater Infrastructure EPC

NAICS

Sewage Treatment Facilities (221320), Water Supply and Irrigation Systems (221310), Environmental Consulting Services (541620)

SIC

Water, Sewer, Pipeline, Comm & Power Line Construction (1623), Sanitary Services (4950), Water Supply (4941), Electric, Gas & Sanitary Services (4900)

akta.pro primary industry

Treatment Plant Asset Programs (Process Assets, Electrical/Mechanical Systems) (EUANALAL)

akta.pro secondary industries

Design & Engineering for Renewal/Expansion (Pipelines, Pump Stations, Treatment Plants) (EUANALAD), Construction Management & Delivery (EPCM/CMAR/Design-Build Oversight) (EUANALAE), Industrial Wastewater & Effluent Treatment Services (BPALAHAD), Construction Management & General Contracting (EPCM, Scheduling, QA/QC, HSE) (EUAMAFAJ), Commercial & Industrial (C&I) BESS EPC & Integration (EUAEAEAB)

Keywords

• Wastewater treatment EPC
• Sewage treatment plants
• Water infrastructure construction
• Operations and maintenance services
• Renewable energy EPC

Headquarters

HQ city

Delhi

HQ country

India

HQ region

Asia

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Supply Chain, Operations, Personnel, Technology or R&D, Infrastructure, Marketing or Sales

Revenue model

1. EPC (Engineering, Procurement & Construction) Contracts: One-time project-based revenue from design, procurement, construction, and commissioning of water/wastewater treatment infrastructure for government bodies. Revenue recognized over project duration with progress-based billing.
2. Hybrid Annuity Model (HAM) Projects: Government infrastructure projects where revenue is earned through annuity payments over 15-year operation and maintenance periods, providing predictable recurring revenue streams alongside construction phase income.
3. Operations & Maintenance (O&M) Services: Long-term O&M contracts for sewage treatment plants, water supply schemes, and associated infrastructure, typically spanning 5-15 years, providing recurring service revenue.
4. Renewable Energy EPC (Post Suyog Urja Acquisition): Wind, solar, and hybrid renewable energy EPC contracts through step-down subsidiary Suyog Urja Ltd, including land aggregation, balance of plant works, and battery energy storage systems.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels5 records

Core offering

Enviro Infra Engineers Limited (EIEL) designs, builds, commissions, and operates water and wastewater treatment infrastructure for government clients across India. Its portfolio covers Sewage Treatment Plants (STP), Water Treatment Plants (WTP), Common Effluent Treatment Plants (CETP), sewerage and water supply schemes, Zero Liquid Discharge (ZLD) systems, and long-term Operations & Maintenance (O&M) services. The company has expanded into Battery Energy Storage Systems (BESS) and wind EPC through its subsidiary Suyog Urja Limited, while delivering full project lifecycle execution under EPC and Hybrid Annuity Model (HAM) contracts.

Product overview

Enviro Infra Engineers Limited operates as a multi-segment infrastructure engineering company offering an integrated portfolio of water, wastewater, and environmental solutions. The core offerings span six distinct but complementary product lines: Sewage Treatment Plants (STP), Water Treatment Plants (WTP), Common Effluent Treatment Plants (CETP), Sewerage Schemes, Water Supply Schemes, and Zero Liquid Discharge (ZLD) Solutions. These are delivered alongside Operations & Maintenance (O&M) Services for ongoing facility management. The company operates across the complete project lifecycle from conceptualization through commissioning and long-term O&M, serving government and government-backed clients. Recent strategic expansions include Battery Energy Storage Systems (BESS) through NTPC projects and Wind EPC services via the Suyog Urja acquisition, positioning the company as a diversified infrastructure player spanning water/wastewater infrastructure and renewable energy solutions.

Differentiator

Problem solved

Functional benefit

Products and services

• Sewage Treatment Plants (STP) Facilities designed to treat wastewater and sewage to remove contaminants, ensuring safe discharge or reuse of treated water; deployed for municipal and government clients under national water and sanitation missions.
• Water Treatment Plants (WTP) Facilities that purify water to make it safe for drinking and other uses by removing contaminants and harmful substances, delivered for government water supply schemes.
• Common Effluent Treatment Plants (CETP) Facilities that treat industrial wastewater from multiple sources collectively, ensuring compliance with environmental regulations and reducing pollution; features zero liquid discharge (ZLD) systems.
• Sewerage Schemes Comprehensive systems designed to collect, transport, and treat wastewater and sewage to protect public health and the environment, delivered alongside STPs under EPC and HAM contracts.
• Water Supply Schemes Structured plans that outline methods and infrastructure needed to deliver safe and reliable drinking water to communities, covering treatment, pumping, storage, and distribution networks.
• Operations & Maintenance (O&M) Services Management and activities to ensure water/wastewater facilities function efficiently over their operational lifespan, including SCADA automation for energy optimization; typically bundled with 5-15 year HAM/EPC contracts.
• Battery Energy Storage Systems (BESS) Utility-scale battery energy storage projects for grid reliability and renewable integration, with NTPC-awarded projects totaling 930 MWh capacity plus 11-year comprehensive annual maintenance.
• Wind EPC Services Wind energy engineering, procurement, and construction services including land aggregation and balance of plant works, delivered through acquired subsidiary Suyog Urja Limited as part of an integrated renewable platform.

Quantifiable outcome

• 15-20% energy savings in STP operations through SCADA automation
• +2 more outcomes

Named customers7 records

Segments5 records

Ideal customer profiles3 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Partnerships

Eight partnerships are on record, tiered growth and core.

• CGE 30 Hybrid Energy Private LimitedgrowthStrategic or Co-development Partner · 6 July 2026₹207.47 crore hybrid renewable energy project contract through step-down subsidiary Suyog Urja Ltd for land aggregation and balance of plant works. Execution up to June 2027. Supports diversification into renewable energy segment.
• Uttar Pradesh Jal Nigam (Rural) - Namami Gange ProgrammecoreStrategic or Co-development Partner · 3 July 2026Two HAM sewage treatment projects worth ₹256.92 crore for 45 MLD STP at DDU Nagar and 60 MLD STP at Lohta, Varanasi, with 15-year O&M. Projects include biogas and solar renewable energy integration for energy self-sufficiency. Expands HAM portfolio to five projects.
• Suyog Urja Limited (Acquisition)coreOthers · 29 April 2026Phased acquisition through EIE Renewables Private Limited for ₹311 crore (51% now, 24% in 2027, 25% in 2028 for 100% ownership). Wind energy EPC company with asset-light, zero-debt model. Expected FY26 revenue ₹355 crore, PAT ₹38 crore. Consolidated order book reaches ₹5,600 crore.
• Swachh Maharashtra Mission DirectoratecoreStrategic or Co-development Partner · 13 April 2026Two EPC contracts worth ₹972.19 crore for sewage treatment infrastructure in Pune and Nashik divisions. Total scope: 241.60 MLD STP capacity, 614.68 km interception & diversion networks, 1,320.88 km sewer pipelines. 24-month execution timeline.
• NTPC LimitedcoreStrategic or Co-development Partner · 30 March 2026Battery Energy Storage System projects at thermal power stations in Tanda (UP), Bongaigaon (Assam), Karnataka, and Telangana totaling ₹664.33 crore. 18-month execution plus 11-year comprehensive annual maintenance. Strategic entry into BESS segment representing ₹1,070 crore total awards.
• Bihar Urban Infrastructure Development Corporation (BUIDC)coreStrategic or Co-development Partner · 12 March 2026₹411.08 crore EPC contract for Aurangabad Sewerage Network and STP Scheme under AMRUT 2.0. Includes 20 MLD STP, 196 km sewerage network, 8 pumping stations, SCADA-based disinfection. 15-month execution with 5-year O&M.
• Maharashtra Industrial Development Corporation (MIDC)growthStrategic or Co-development Partner · 10 July 2025₹395 crore pollution control project JV with AltoraPro Infrastructure for CETP upgrades in Kolhapur district under Panchganga River pollution control programme. Features zero liquid discharge systems. 24-month execution timeline.
• Chhattisgarh MunicipalitiesgrowthStrategic or Co-development Partner · 24 June 2025₹306.30 crore sewage treatment infrastructure contracts across multiple municipalities. STPs with capacities 2-33 MLD each with 15-year O&M. Demonstrates execution capability across varied project sizes.

Scale indicators12 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• VA Tech Wabag: India and global pure-play water and wastewater treatment EPC company with strong municipal/government client base. Directly comparable to Enviro Infra in STP, WTP, ZLD, and O&M services across India and international markets.
• Thermax Limited: India-based EPC and equipment company with a dedicated water and wastewater solutions division serving industrial and municipal clients. Closely comparable in ZLD, CETP, and industrial effluent treatment offerings.
• Praj Industries: Process engineering company with water and wastewater treatment business serving industrial and municipal customers. Comparable in technology-driven EPC for ethanol, brewery, and effluent treatment plants.
• Ion Exchange (India): Indian water and environmental management company providing treatment plants, chemicals, and O&M services. Comparable in WTP, STP, and industrial water treatment with strong government and industrial footprint.
• Triveni Engineering & Industries: Indian conglomerate with water and wastewater treatment business providing turnkey EPC and O&M to municipal and industrial clients. Comparable in EPC delivery model and government tendering focus.

Broad incumbents

• Larsen & Toubro (L&T) Construction: India's largest infrastructure conglomerate with a water and effluent treatment vertical within its construction business. Competes for large municipal STP and HAM projects and BESS infrastructure.
• Tata Projects: Large Indian EPC company executing water supply, sewerage, and treatment plant projects under government missions. Competes directly for AMRUT, Namami Gange, and SBM 2.0 contracts.
• NCC Limited: Major Indian infrastructure EPC company with diversified portfolio including water supply, sewerage, and irrigation projects. Comparable in government contracting model and HAM execution.
• Dilip Buildcon: Indian infrastructure EPC focused on roads, urban development, and water supply projects under government HAM and EPC models. Comparable in tender-based government contracting and multi-state execution.

Emerging players

• KEC International: Power infrastructure EPC company entering civil and water infrastructure segments. Overlaps with Enviro Infra's new BESS and renewable EPC expansion through proven utility-scale execution.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInin.linkedin.com/company/enviro-infra-engineers-private-limited

Revenue estimate

Valuation estimate

Number of profiles

Profiles9 records

Subsidiaries11 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Enviro Infra Engineers