Sattva Engineering Construction Limited (SECL), incorporated in December 2005 and based in Chennai, is an EPC company with over 40 years of experience in water infrastructure, wastewater management, and industrial construction. Recognized as a leading Class I contractor, it works closely with government bodies such as the Tamil Nadu PWD and CMWSSB. SECL provides end-to-end EPC solutions across water and wastewater projects, industrial and civil infrastructure, and residential developments, including treatment plants, pumping stations, warehouses, factory buildings, and multi-storeyed apartments. Its notable clients include CMWSSB, TWAD, PWD, Greater Chennai Corporation, Southern Railway, and BHEL.