Meaning
The Central Ground Water Board is India’s main national agency for scientific assessment, monitoring and management of groundwater resources.
It functions under the Department of Water Resources, River Development and Ganga Rejuvenation, Ministry of Jal Shakti.
Unlike the Central Ground Water Authority, which is mainly regulatory, the Central Ground Water Board is primarily a technical and scientific organisation.
Background
The Board was established in 1970 by renaming the Exploratory Tubewells Organization.
Later, in 1972, it was merged with the Ground Water Wing of the Geological Survey of India.
It was created because groundwater became increasingly important for irrigation, drinking water, industry and rural development.
Main Functions
The Central Ground Water Board performs functions related to groundwater study, assessment and planning.
Its major functions include:
- Groundwater exploration
- Aquifer mapping
- Monitoring groundwater levels
- Studying groundwater quality
- Estimating groundwater resources
- Providing technical advice to states
- Supporting artificial recharge planning
- Preparing groundwater maps and reports
- Studying over-exploited and critical areas
- Promoting sustainable groundwater management
Groundwater Monitoring
CGWB maintains a large network of observation wells across India.
Through these wells, it monitors:
- Seasonal groundwater level changes
- Long-term water table trends
- Groundwater quality
- Regional aquifer behaviour
- Areas facing decline or contamination
This data is important for planning drinking water supply, irrigation policy and drought management.
Aquifer Mapping
One of the important roles of CGWB is aquifer mapping.
Aquifer mapping means identifying underground water-bearing formations and understanding their characteristics.
It helps in knowing:
- Where groundwater is available
- How much water can be extracted safely
- Which aquifers are over-stressed
- Where recharge can be done
- Which areas face contamination risk
This is important because groundwater is not uniformly available everywhere.
Groundwater Resource Assessment
CGWB works with states to assess India’s groundwater resources.
The assessment classifies areas into categories such as:
- Safe
- Semi-critical
- Critical
- Over-exploited
- Saline
This classification helps governments plan groundwater use and control excessive extraction.
Groundwater Quality
CGWB also studies groundwater contamination.
Major groundwater quality problems in India include:
- Arsenic
- Fluoride
- Nitrate
- Iron
- Salinity
- Heavy metals
- Industrial pollution
These problems affect drinking water security and public health.
Difference Between CGWB and CGWA
Central Ground Water Board
- Scientific and technical body
- Studies groundwater
- Monitors water levels
- Maps aquifers
- Assesses groundwater resources
- Provides technical inputs
Central Ground Water Authority
- Regulatory body
- Controls groundwater extraction
- Issues NOCs
- Enforces guidelines
- Imposes environmental compensation
- Regulates bulk groundwater users
In simple terms, CGWB studies groundwater, while CGWA regulates groundwater extraction.
Importance
The Central Ground Water Board is important because groundwater is one of India’s most critical natural resources.
Its work supports:
- Drinking water security
- Irrigation planning
- Drought management
- Urban water planning
- Industrial water regulation
- Aquifer protection
- Climate resilience
- Sustainable water use
India depends heavily on groundwater, especially for irrigation and rural drinking water. Therefore, scientific groundwater data is essential for policy-making.
Challenges
Groundwater management remains difficult despite scientific monitoring.
Major challenges include:
- Excessive extraction for irrigation
- Declining water tables
- Groundwater contamination
- Unregulated private borewells
- Weak state-level enforcement
- Poor recharge in urban areas
- Climate change affecting rainfall and recharge
- Lack of real-time groundwater data
- Overdependence on groundwater in dry regions
CGWB provides technical knowledge, but implementation depends heavily on states and local bodies.
Conclusion
The Central Ground Water Board is India’s key technical institution for groundwater assessment and management.
It studies aquifers, monitors water levels, assesses groundwater resources and provides scientific inputs for policy.
As groundwater depletion and contamination increase, CGWB’s role is becoming more important for water security, sustainable agriculture, urban planning and climate resilience.
