Tamil Nadu’s growing industrial water challenge, Pg6

Key Highlights:

• Tamil Nadu ranks third in NITI Aayog’s Investment Friendliness Index (IFI), released in July 2026, behind Gujarat and Maharashtra.
• A key challenge identified for the state is inadequate industrial water supply, particularly in landlocked and rain-shadow districts.
• Despite a national decline, Tamil Nadu's Foreign Direct Investment (FDI) inflows peaked at $3.681 billion in 2024-25.
• The state accounts for only 3% of India’s water resources, with an average annual rainfall of 960mm.
• Industrial water demand is projected to increase from 1,555 MCM in 2001 to 1,985 MCM by 2050.
• The Water Resources Department faces an 8.06% budget cut this year.
• The Tamil Nadu Water Resources (Regulation, Management and Augmentation) Bill, 2026 awaits the Governor’s assent.

Detailed Insights:

• Tamil Nadu's robust industrial economy includes 130 Global Fortune 500 companies across 110 industrial parks and over 42 Special Economic Zones.
• The state's geography, largely in the rain shadow region of the Western Ghats, limits its natural water reserves.
• While overall groundwater extraction is below the state's annual extractable resource, industrial districts like Salem, Vellore, and Chennai are classified as over-exploited.
• Water scarcity can disrupt industrial production, inflate operational costs, and deter new investments, especially in water-intensive sectors like textiles and automobiles.
• Pollution of water bodies, particularly in Western Tamil Nadu, further exacerbates the water crisis and negatively impacts investment decisions.
• Zero Liquid Discharge (ZLD) systems, exemplified by Tiruppur's textile clusters, can recover up to 90% of water but pose cost challenges for smaller industries.
• Integrating green energy with water management solutions like ZLD, desalination, and sewage treatment can enhance their affordability and sustainability.
• The legal framework for water management in Tamil Nadu has been in limbo since the repeal of the Tamil Nadu Groundwater (Development and Management) Act in 2013.
• Effective water pricing, stronger governance, and prudent consumption are crucial for sustaining industrial growth and attracting future investments.

Key Concepts Involved:

• NITI Aayog’s Investment Friendliness Index (IFI): A report assessing states' readiness to attract and sustain investments.
• Zero Liquid Discharge (ZLD): A water treatment process that recovers and reuses nearly all wastewater, leaving minimal liquid waste.
• Rain Shadow Region: An area on the leeward side of a mountain range that receives significantly less rainfall due to the rain-bearing winds being blocked.
• Water (Prevention and Control of Pollution) Act, 1974: An Indian parliamentary act to prevent and control water pollution and maintain water quality.