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Ion Exchange India Limited, incorporated in 1964, provides total water and environment management solutions spanning pre-treatment, process water, wastewater treatment, recycle, Zero Liquid Discharge, sewage treatment, packaged drinking water, and sea water desalination, with offerings extending to homes, hotels, hospitals, laboratories, realty, defence, and rural communities. The company operates 7 plants and 11 offices in India, plus 2 international offices, serving 28 states and 7 union territories and exporting to 67 countries, with exports contributing 31% of turnover in FY 2024–25 on a standalone basis. Key products and services include engineering EPC solutions (desalination, recycle, ZLD, waste-to-energy, O&M), ion exchange resins and specialty chemicals, membranes (UF/NF/RO/MBR), and consumer drinking water systems under ZeroB.
As of March 31, 2025, the group had multiple subsidiaries across India, APAC, Middle East, Africa, and Europe, including Ion Exchange Asia Pacific Pte. Ltd. (100%), PT Ion Exchange Asia Pacific (95%), Ion Exchange LLC (100%), Ion Exchange Arabia for Water (60%), Ion Exchange Europe LDA (99.98%), and MAPRIL Lda (100%), among others; associates include Aquanomics Systems Ltd. (48.42%), Ion Exchange PSS Co. Ltd. Thailand (49%), and Ion Exchange Financial Products Pvt. Ltd. (24.02%).
Milestones in FY 2024–25 included commissioning a 40 MLD North Africa desalination plant and advancing two more large plants (60 MLD and 40 MLD) in the region, substantial completion of the Sri Lanka project, and steady progress on UP Jal Nigam under Har Ghar Jal.
Digital transformation: SAP One ERP rollout; MarTech and AI-enabled lead automation; IoT/Edge pilots with cloud monitoring to optimise performance and reduce outages.

Engineering 63%, Chemicals 26%, Consumer Products 11% (by primary activities accounting for 90% of turnover).
The group includes numerous subsidiaries across India, APAC, Middle East, Africa, and Europe (e.g., Ion Exchange Asia Pacific Pte. Ltd., PT Ion Exchange Asia Pacific, Ion Exchange LLC, Ion Exchange Arabia for Water, Ion Exchange Europe LDA, MAPRIL Lda) and associates including Aquanomics Systems Ltd., Ion Exchange PSS Co. Ltd., and Ion Exchange Financial Products Pvt. Ltd..
Exports were 31% of standalone turnover.