EMS Limited is a water-infrastructure specialist that was born when two senior engineers left government service to build exactly what they had spent two decades managing - sewage treatment plants and sewer networks for urban India. Incorporated in 2010 and listed in 2023 after an IPO that was oversubscribed 76 times, the company has grown from a 4 MLD (million litres per day) plant to handling 80 MLD facilities, all while staying exclusively in the government sector where payments come from World Bank or Asian Development Bank-funded projects and bad debts are virtually zero. The recurring approach that explains everything else is an asset-light, full-stack model: EMS keeps design, engineering, procurement and construction in-house rather than outsourcing to consultants, buys all materials itself and only gives labour contracts, then locks in multi-year operation and maintenance deals on the assets it builds - so every project creates both a construction fee today and an annuity-like service stream for years afterward.
Business segments
Three engines built on the same government-tender chassis - a water and wastewater EPC cash cow that also feeds a long-duration O&M annuity stream, a smaller electrical and building infrastructure practice that shares the same in-house teams, and a recently acquired paper mill that exists mainly to strengthen the balance sheet.
1. Water and wastewater EPC and O&M: the group's defining engine
EMS designs, builds and then operates sewage treatment plants and sewer networks for state government bodies, earning construction revenue upfront and steady O&M fees for up to 15 years afterward - all with the client's funding already secured from multilateral lenders.
- End-to-end, not piecemeal - the company is one of the few Indian players that can lay sewer pipes and build the treatment plant in a single bundled contract, which means it competes for projects that smaller, single-skill contractors cannot touch.
- Design stays inside the firm - unlike many competitors who outsource engineering to consultancy firms, EMS performs process design, hydraulic calculations, layout and flow diagrams entirely with its own in-house engineers and proprietary software, so it controls both quality and cost from the first drawing.
- Built, then operated by the same team - the company had 27 bundled projects with O&M scope as of March 2025, meaning it constructs the asset and then runs it for years under a separate contract; O&M revenue is invoiced quarterly, creating a recurring income stream on top of the one-time construction fee.
- The client's money is already in the bank - projects are predominantly funded by the World Bank, Asian Development Bank, JICA or KWF and channelled through state bodies, which EMS says results in zero bad debts and zero delinquencies across its entire government order book.
- Selective about where it goes - the company operates across five states and recently entered West Bengal with a roughly ₹780 crore STP and sewer contract, but it deliberately avoids spreading into too many new locations at once to sidestep local delays and interruptions.
2. Electrical T&D and building infrastructure: the same chassis, different structures
EMS applies its in-house engineering teams and government-tender playbook to power substations, transmission lines, buildings and roads - work that fills the pipeline between water projects and keeps the civil construction crew employed.
- Substations and overhead lines for state utilities - the company designs and builds 33/11 KV, 66/33 KV and 132/33 KV substations, erects transformers and panels, and lays underground trenchless lines, all for government clients under the same B2G framework as the water business.
- Buildings that range from a central bank to housing - EMS has delivered a ₹325 crore Reserve Bank of India building in Mumbai and won a Letter of Award for civil and finishing works on a multi-storeyed group housing project in Noida, with rates fixed per square foot to keep margins steady regardless of input-cost swings.
- Roads in the hills - in Uttarakhand, the company restores roads down to the subgrade and lays a bituminous layer, though heavy rainfall regularly damages transmission lines there and forces restoration work before other project activities can begin.
3. Manufacturing: a paper mill bought for its balance-sheet heft
EMS acquired a former bank-auction paper unit in Fatehpur primarily so it could pledge the property as collateral for bank guarantees - the flex paper it produces is a small, self-funding side effect.
- Bought from a bank, not a seller - in an earlier deal, EMS acquired a former NPA unit from a bank auction at approximately ₹22-23 crores, which now holds a collateral value of roughly ₹50 crores, instantly strengthening the company's ability to secure the bank guarantees that government contracts require.
- Runs itself - the Fatehpur factory requires no funding from the parent, produces about 800-900 tons of flex paper with potential to exceed 1,100 tons, and generates a profit of roughly 5% over revenue.
Group structure and partners
EMS uses subsidiaries and joint ventures as bidding and execution vehicles - each one is formed to meet the technical or financial prequalification bar of a specific government tender, not to diversify into unrelated businesses.
- Subsidiaries that hold specific contracts - Mirzapur Ghazipur STPS Private Limited (60% held) exists solely to execute a 15-year Hybrid Annuity Model STP project in Uttar Pradesh, while SK UEM Water Projects Private Limited handles O&M contracts for sewerage treatment plants.
- JV partners open doors to bigger bids - the company forms partnerships with other infrastructure firms to jointly meet prequalification criteria; a Letter of Acceptance for three STPs in Indore worth ₹41,646.07 lakhs involves EMS holding a 26% share alongside a JV partner, and a December 2025 JV with Neercare India was created for carrying on the business of design and building of sewage treatment plants, pumping stations, and sewerage networks.
- A concrete venture with a family connection - EMS Concrete, a 75%-held partnership formed in December 2025 with Mr. Gajendra Parihar on an arm's-length basis, will manufacture and supply ready-mix concrete and allied construction materials.