HECS Secures CRZ Clearance for Mamallan Reservoir 

Hubert Enviro Care Systems (HECS), in collaboration with IIT Madras and Anna University, has successfully obtained Coastal Regulation Zone (CRZ) clearance for the Mamallan Reservoir Project near Nemmeli, a landmark initiative to enhance drinking water security, flood mitigation, and coastal groundwater protection in Tamil Nadu.

On 19th January 2026, Hon’ble Chief Minister Thiru M. K. Stalin laid the foundation stone for the project near Nemmeli and flagged off the commencement of works in the presence of Hon’ble Deputy Chief Minister Thiru Udhayanidhi Stalin, state ministers, and senior officials. Addressing the gathering, the Chief Minister highlighted that nearly 18 km of the Buckingham Canal, from Thiruvidanthai to Mamallapuram, will be renovated as part of the project to prevent seawater intrusion, safeguard groundwater quality, and improve flood water management.

As the environmental consultant to the project, HECS provided comprehensive scientific and regulatory support, including CRZ appraisal, environmental impact inputs, and preparation of mitigation and management plans. HECS’ studies on hydrology, salinity control, groundwater protection, and wetland ecology—undertaken in coordination with IIT Madras and Anna University—were integral to securing CRZ clearance. The work also included habitat conservation planning, greenbelt development, and long-term environmental monitoring frameworks to ensure regulatory compliance and ecological sustainability.

The Mamallan Reservoir, with a storage capacity of 1.655 TMC (annual capacity of 2.25 TMC / ~170 MLD), is expected to meet the drinking water needs of more than 50,000 people across Nemmeli, Thiruporur, Mamallapuram, and surrounding villages, while acting as a flood buffer, enhancing groundwater recharge, and reducing reliance on energy-intensive water sources. This milestone reinforces HECS’ commitment to science-driven environmental solutions, sustainable infrastructure, and resilient water management for coastal and urban ecosystems.