Name of basins Narmada, Tapi, Mahi, Sabarmati and others. Total surface water availability (75% dependability) 18,513 MCM Contribution from other state Distribution of resources 18,047 MCM Gujarat Main 16,225 MCM Saurashtra 2,082 MCM Kachchh 206 MCM       Dynamic resources 16,060.35 MCM Utilisable resources for irrigation 12,848.28 MCM Gross annual ground water draft 9,708.86 MCM Stage of ground water development 75.57% Number of Over Exploited Talukas 31 Number of Dark Talukas 8 Number of Grey Blocks 42 Total static resources 1,87,057 MCM For hard rock area 0.02* 106 MCM For alluvial area 2.56* 106 MCM   District Wise Ground Water Potential (Year - 1997)   Ground Water Potential of Gujarat State District Wise Irrigation Potential (Year - 1997)   Irrigation Potential of Gujarat State     List of O.E., Dark & Grey Talukas   The ground water quality of the state is being monitored by analysing water samples from selected Hydrograph Network Stations in May each year. By and large the ground water is suitable for drinking, Irrigation and Industrial purpose in the State. The electrical conductivity ranges from less than 1000 to more than 10000 micro-mho/cm at 25°C. Higher values of EC (more than 3000) is observed in coastal area and in areas with inherent salinity. Chloride ranges from less than 100 ppm to more than 2000 ppm. Higher values of chloride (more than 200 ppm) are observed in coastal area and in areas with inherent salinity.