Central Ground Water Board, Ministry of Water Resources, Government of India

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

State Profile

Ground Water Scenario of Kerala

Area (Sq.km)	38,863
Rainfall (mm)	3073
Total Districts / Blocks	14 Districts

Hydrogeology

Physiographically, the State can be divided into three zones namely the Coastal plains, the Midlands and the Hill ranges. Major portion of the State is underlain by the crystalline rocks of Archaean age. Sedimentary formations of Eocene to Recent overlie these crystalline rocks along the coastal belt. The tubewells tapping the aquifers in crystalline rocks yield between 6-10 m3/hr. The midland area is capped by laterites where the yield of tube well varies from 10-15 m3/hr. In the coastal area, where Tertiary formations possess promising aquifers, the tube wells yield 12-15 m3/hr under free flow conditions.

Dynamic Ground Water Resources (2011)
Annual Replenishable Ground water Resource	6.69 BCM
Net Annual Ground Water Availability	6.07 BCM
Annual Ground Water Draft	2.84 BCM
Stage of Ground Water Development	47 %
Ground Water Development & Management
Over Exploited	1 Blocks
Critical	2 Blocks
Semi- critical	23 Blocks

Artificial Recharge to Ground Water (AR)	Area identified for AR: 10849 sq km Volume of water to be harnessed: 1520 MCM Volume of water to be harnessed through RTRWH:181.44 MCM Feasible AR structures: Percolation tank – 3109 Check dams - 3032 Sub surface dam – 832 Nala Bund - 54957 Gabian Bund - 106173 I W - 45 Gully plug - 586279 RTRWH (H) - 299250 RTRWH (G&I) - 15750
Ground Water Quality Problems
Contaminants		Districts affected (in part)
Salinity (EC > 3000 µS/cm at 25 ° C)		Thiruvananthapuam, Kollam, Ernakulam, Thrissur, Malappuram
Fluoride (>1.5 mg/l)		Palakkad, Alappuzha, Idukki, Ernakulum, Thiruvananthpuram.
Iron (>1.0 mg/l)		Alappuzha, Ernakulam, Idukki, Kannur, Kasaragod, Kollam, Kottayam, Kozhikode, Malappuram, Palakkad, Pathanamthitta, Thiruvananthapuram, Thrissur, Wayanad
Nitrate (>45 mg/l)		Alappuzha, Ernakulam, Idukki,Kannur, Kollam, Kottayam, Kasargod, Kozhikode, Malappuram, Palakkad, Pathanamthitta, Thiruvananthapuram, Thrissur, Wayanad
Heavy metals: Lead (above 0.01 mg/l) Chromium (above 0.05 mg/l)		Lead: Ernakulam , Kollam Chromium: Kollam

Central Ground Water Authority

Areas Notified for Regulation of ground water development

NIL

CENTRAL GROUND WATER BOARD