International Groundwater Resources Assessment Centre

For Asia, this map indicates the probability of occurrence of excessive concentrations of fluoride in groundwater, on a scale of high-medium-low.

In India, salinity has three types of genesis - one, by dissolution (areas concentrated in Kutch, North Rajasthan and bordering Punjab, South Rajasthan and bordering areas of Madhya Pradesh and parts of Western Uttar Pradesh; two, by irrigation (areas concentrated in the Deccan Peninsular region of Andhra Pradesh, Karnataka and Tamil Nadu) and parts of Orissa and West Bengal; and three, by late

Trans-boundary aquifers (TBAs) of the world: This map shows the present state of information regarding the occurrence and extent of TBAs world-wide. The intention of the map is to provide a global overview of these important shared water resources and to encourage their further assessment.

In India, TBAs are located on the India-Pakistan, India-Nepal and India-Bangladesh borders.