The soil strata in general comprises of clayey silt soils in the top layers followed by sandy silt to silty sands at depths in most of the sectors.
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The page provides rainfall data for most of the major cities (28) of India. The data source is National Data Centre, India Met. Department, Pune. The values are 25-year average for a period of approximately between early eighties and early two thousands. The user can click on the cities to get the average annual rainfall and number of rainy days. More
Recently, chairman of Tata group, Ratan Tata, unveiled a water filter called 'Swach' which uses nano technology to purify water. Tata Research, Development and Design Centre (TRDDC) and Tata Chemicals have jointly developed the core technology.
The quality of ground water is alkaline with pH ranging from 7.1 to 9.2, chloride content ranges between 21 and 1380 ppm. South of Delhi average chloride content is 250 ppm while in Najafgarh area it is around 1000 ppm rendering the water saline covering the area of 32 km. Sq. and marginally saline over the area of 129 sq km.