Central Water Commission: This is a government agency responsible for water resource management in India. It was established in 1945 and comes under the Ministry of Jal Shakti. Its main functions include advising the government on water resource planning and management, monitoring water levels and river flows, and providing flood forecasting and warning services.

Central Ground Water Board: This is also a government agency that comes under the Ministry of Jal Shakti. It is responsible for developing and managing the country's groundwater resources. Its main functions include groundwater exploration, assessment, and mapping, as well as regulation of groundwater development and use.

Central Ground Water Authority: This is a statutory authority established under the Environment (Protection) Act, 1986. Its main role is to regulate and control groundwater development and use in the country. It also deals with issues related to over-exploitation of groundwater and pollution of groundwater resources.

National Water Development Agency: This is a government agency under the Ministry of Jal Shakti that was established in 1982. Its main functions include conducting water resource assessments, preparing feasibility reports for water resource development projects, and coordinating inter-state water disputes. It also provides technical support to the government on water resource planning and management.