Mitigate arsenic and fluoride contamination in groundwater: NGT instructs state governments
Mitigate arsenic and fluoride contamination in groundwater: NGT instructs state governments
The directive by the National Green Tribunal (NGT) to state governments to mitigate arsenic and fluoride contamination in groundwater highlights a serious public health and environmental challenge in India.
1. Background of the Issue
Groundwater is the primary source of drinking water for a large population in India. However, contamination by arsenic and fluoride has emerged as a widespread problem:
- Arsenic contamination is prevalent in states like West Bengal, Bihar, Assam, and Uttar Pradesh.
- Fluoride contamination is common in Rajasthan, Telangana, Andhra Pradesh, and Karnataka.
These contaminants occur naturally due to geological conditions but are aggravated by human activities like over-extraction of groundwater.
2. Health Impacts
Arsenic
- Causes arsenicosis (skin lesions, pigmentation)
- Leads to cancers (skin, lung, bladder)
- Affects cardiovascular and nervous systems
Fluoride
- Causes dental fluorosis (tooth discoloration)
- Leads to skeletal fluorosis (bone deformities, joint pain)
- Long-term exposure leads to disability
3. NGT Directions
The National Green Tribunal has:
- Directed state governments to:
- Identify contamination hotspots
- Ensure supply of safe drinking water
- Install treatment plants (RO, defluoridation units)
- Asked for time-bound action plans
- Emphasized accountability of local authorities
- Called for periodic monitoring and reporting
4. Causes of Contamination
Natural Causes
- Geological leaching of arsenic and fluoride from rocks
- Aquifer characteristics
Anthropogenic Causes
- Excessive groundwater extraction
- Poor irrigation practices
- Industrial discharge and lack of waste treatment
5. Government Initiatives
a. Jal Jeevan Mission
- Aims to provide functional household tap connections (FHTC)
- Focus on water quality monitoring
b. National Water Quality Sub-Mission
- Targets arsenic and fluoride-affected areas
c. Atal Bhujal Yojana
- Promotes sustainable groundwater management
d. Central Ground Water Board (CGWB)
- Monitors groundwater quality and levels
6. Challenges
- Lack of real-time data and monitoring
- Poor maintenance of treatment plants
- Limited awareness in rural areas
- Institutional fragmentation between agencies
- High cost of remediation technologies
7. Way Forward
Technological Measures
- Adoption of low-cost filtration technologies
- Community-level water purification systems
Policy & Governance
- Strengthen coordination between central, state, and local bodies
- Enforce stricter groundwater extraction regulations
Community Participation
- Awareness campaigns on safe water usage
- Involving Panchayats in water management
Sustainable Practices
- Promote rainwater harvesting
- Recharge of aquifers to dilute contaminants
8. Conclusion
The NGT’s intervention underscores the urgency of addressing groundwater contamination as both a public health crisis and a governance issue. Ensuring safe drinking water is crucial for achieving Sustainable Development Goal (SDG) 6—clean water and sanitation. A combination of technology, policy enforcement, and community engagement is essential for long-term solutions.
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