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Ground Water is a Precious National Resource - Preserve it, Protect it and Don't Pollute it.

State Profile 
Ground Water Scenario of West Bengal

Area (


Rainfall (mm)


Total Districts / Blocks

19 Districts  


The State can be divided into two hydrogeological unit namely fissured hard rocks & porous alluvial formations. Fissured formation includes crystalline, metasedimentary and volcanic rocks. The yield of wells tapping fractured zones varies from 10-20 m3/hr. Two third of the State is underlain by alluvial sediments mainly deposited by Ganga & Brahmaputra rivers. Based on the yield of wells tapping these alluvial sediments, aquifers of the alluvial area can be divided into three zones. 1. Yielding about 150m3/hr, occurs from Jalpaiguri to Kochbihar in north to Medinipur & 24 Parganas in South. 2. Yielding about 50-150 m3/hr, occurs in parts of Malda, Dinanjpur and western part of Murshidabad Districts. 3. Yielding less than 50m3/hr, occurs as Marginal alluvial tract in parts of Birbhum, Burdawan, Bankura and Murshidabad Districts.

Dynamic Ground Water Resources (2011)

Annual Replenishable Ground water Resource

29.25 BCM

Net Annual Ground Water Availability

26.58 BCM

Annual Ground Water Draft

10.69 BCM

Stage of Ground Water Development

40 %

Ground Water Development & Management

Over Exploited




Semi- critical

53 Blocks

Artificial Recharge to Ground Water (AR)


  • Area identified for AR: 36730 sq km
  • Volume of water to be harnessed:17797  MCM
  • Volume of water to be harnessed through RTRWH:100.80 MCM
  • Feasible AR structures:

Hard Rock

  • Percolation tank- 1679
  • Check dams- 4449
  • Gabion structures- 12277
  • Sub surface Dykes- 5385
  • Recharge Shaft- 1218


  • Percolation tank- 15913
  • Tanks- 41623
  • Injection well- 14816
  • RTRWH(H)- 285000
  • RTRWH(H&I)- 15000

Ground Water Quality Problems


Districts affected (in part)

Salinity  (EC > 3000 µS/cm at 25 ° C)

Howrah, N 24 Parganas, PurbaMedinipore, S 24 Parganas

Fluoride (>1.5 mg/l)

Bankura, Bardhaman, Birbhum, Dakshindinajpur, Malda, Purulia, Uttardinajpur.

Iron (>1.0 mg/l)

Bankura, Bardhaman, Birbhum, Dakhindinajpur, E. Midnapur, Howrah, Hugli, Jalpaiguri, Kolkatta, Murshidabad, N-24 Parganas, Nadia, S-24 Parganas, Uttardinajpur, West Midnapur

Nitrate  (>45 mg/l)

Bankura, Bardhaman

Arsenic (>0.05 mg/l )

Bardhaman, Hooghly, Howrah, Malda, Murshidabad, Nadia, N-24 Parganas, S- 24 Parganas

Heavy metals:
Lead (above 0.01 mg/l)
Cadmium (above 0.003 mg/l)
Chromium (above 0.05 mg/l)

Lead: Malda, Murshidabad, Nadia, N-24 Pargana, S-24 Pragana, Kolkata
Cadmium: N-24 Praganas, S-24 Prganas
Chromium: N-24 Praganas, Murshidabad

Central Ground Water Authority

Areas Notified for Regulation of ground water development

Haldia Industrial Complex (aquifer below 120 ml) East Medinipur District