Pollution Issues at Sembakkam Lake

Sembakkam Lake Pollution Summary

Environmental and Public Health Concerns

• Location: Sembakkam Lake, a historic freshwater wetland under the Tambaram Corporation.
• Current Status: Ongoing pollution due to illegal discharge of untreated sewage.
• Area Reduction: Lake's area has shrunk from 150 acres to approximately 100 acres due to encroachments.

Legal and Regulatory Framework

• National Green Tribunal (NGT):
  • First Case Filed: The issue escalated to the NGT in 2017, leading to a directive for an action taken report by October 2022.
  • Litigation: A fresh petition was submitted in 2024, which is still under litigation.

Government Response

• Government Funding: ₹10 crore allocation by the Chennai Metropolitan Development Authority in 2023 for lake rejuvenation has not been utilized.
• Agencies Involved: Tambaram Corporation, Water Resources Department.

Local Activism and Community Response

• Activist Allegations: Continuous illegal dumping of sewage and improper functioning of the underground drainage (UGD) system.
• Community Actions: Residents have made multiple representations to authorities without effective results.

Public Health Issues

• Health Risks: Reports of skin rashes among residents potentially linked to groundwater contamination from sewage discharge.

Recommendations by Activists

• Immediate Actions:
  • Halt sewage inflow into the lake.
  • Desilt the lake.
  • Prevent further encroachments.
• Long-term Measures:
  • Restore stormwater channels and create freshwater inlets.

Environmental Impact and Ecological Consideration

• Ecological Damage: Ongoing pollution threatens local biodiversity and ecological balance.
• Public Awareness: Activists are calling for state government prioritization of restoration efforts to prevent irreversible ecological damage.

Key Takeaways

• The situation highlights significant failures in environmental governance and public health protection.
• Legal frameworks, such as directives from the NGT, have not been adhered to, raising questions about accountability and enforcement in environmental management.
• Community-led initiatives are crucial in addressing local environmental issues, supported by government action and adherence to legal mandates.