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About Us

As part of the Heritage Conservation journey, when Chandrasekaran, a plastics technologist visited villages in Tamilnadu for temple renovation, he witnessed the critical needs for clean water and sanitation among the village residents. These were the seeds for his idea to build affordable purifiers and ready-to-fit toilets to cater the rural population .Leveraging an IMMT- CSIR license, the Terafil water purifier was developed, alongside toilets were crafted from waste glass fibers, reducing environmental impact. Initially these products were built under the name of Custom Parts Online, Chandrasekaran's proprietary firm and the focus remained on rural India, where 73% of the population resides, grappling with water and sanitation challenges. Recognizing the need for concerted efforts, Chandrasekaran and PN Subramanian co-founded WATSAN in 2013, dedicated to sustainable solutions. Since then, accolades have affirmed our commitment to eco-friendly essentials, driving nationwide impact in accessible water and sanitation solutions.


To improve the living standards and ensure a dignified, happy and healthy life for at least 100 million families across the world, within the next five years, by providing sustainable water and sanitation solutions.


Use technology as a driver to make the water and sanitation solutions, efficient and affordable.

Our dedication to quality, innovation and social impact drives us forward as we continue to expand our reach and impact in the quest for water and sanitation for all.

Team Behind WATSAN

Chandrasekaran. J

Founder & Managing Director
Chandrasekaran J. has 32 years of industry experience in plastics technology, specializing in designing, prototyping, and manufacturing various products. He holds a license from IMMT (CSIR) for Terafil water filters which has benefitted over 4 lakh households till now. He collaborates with eminent academic institutions like IITs and other institutions to solve the water contamination issues across the water cycle. Recognized for innovation and heritage conservation, he had received several awards, including startup awards from CII and FICCI for his contributions to healthcare and startup empowerment.


P. N. Subramanian

P.N. Subramanian, Co-founder and Director of WATSAN Envirotech Private Limited since 2013, brings 35 years of diverse industry experience. With a Bachelor's in Engineering and an MBA from XLRI, he specializes in strategic planning and finance, driving the company's growth in sustainable water and sanitation solutions.

Rajlakshmi K

Strategy Head
Rajlakshmi K, our Chief Change Maker for Outreach Programs and Strategy Head, brings over three decades of IT expertise, focusing on modernization and project management. Her experience aids WATSAN in streamlining the systems and processes, ensuring effective engagement with our partners and stakeholders leading to efficiency in operations.

Chandni Lamba

Advisor – CSR and Philanthropy
With over 30 years of diverse experience in manufacturing, financial services, philanthropy, and training, Chandni Lamba now focuses on CSR & sustainability advisory, aligning organizations and individuals with SDGS.

Dr. Mansee Bal Bhargava

Dr. Mansee Bal Bhargava, a transdisciplinary expert in sustainability and liveability, has joined WATSAN as a consultant. Her mission is to empower women across India to become change makers and create grassroots-level Women Water Warriors (WWW) to understand, remediate, and promote water sustainability, aiming for a water-positive India.

Our Admin Office team



Ramchandra Sharma

Design Engineer

Our Factory team

Collaboration & Recognition