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Location where technology is being evaluated : Parwada and Gorimja (Jamnagar).

Number of people approximately being served by the technology : 1200

Since when it is in operation? : It is an ancient technology.

Who Designed / Planned and who implemented / constructed the technology?

Mr.  Sureshbhai Ghanshyambhai Sidhpura
Mr.  Dalipbhai Desai (Parwada)
Mr. Veerjangbhai Jethabhai Manak
Mr. Jaidevbhai Kera (Gorimja)

Who is taking care of the technology now?  Owner of the tank.

Are there any standards available which need to be fulfilled by the technology? If yes which? Drinking water.

Are operations and maintenance data records available?  No.

Please provide a brief summary of the history/evolution of this technology in the selected case study:

It may be  a matter of wonder for many that the water of rainy season could last for the summer of next year for drinking purpose when the water stored from the bore well for even a week is no longer potable. But it is very much practiced in many Indian villages. This indigenous technology dates back many hundreds years ago when people used to do water harvesting for their needs by digging underground tanks, wells, bawari, etc. Lime too was used by them for water treatment. Earlier, people used earthen pots filled with lime and cover their mouths with a piece of cloth. They then used to put the earthen pots in tank and lime, in this way, used to leach out slowly and thus purify the water. The method adopted today by some people is that they put 3-4 packets of lime weighing 1-2 kilogram each depending upon the size of underground tank. These packets are lightly pierced so that lime leaches out slowly from them. These packets may be replaced by fresher ones for more effectiveness and sometimes chlorine too is used for the same.

Brief technical description of technology:

The current method through which water treatment is done is : As shown in the Fig.1, the roof area is thoroughly cleaned up. In places where the roof slope is lined with open pipes, slightly slanted to carry the water from the rains on the roof into a small square cistern. This cistern is so made that the dirt in the rainwater gets settled here and then the additional water is allowed to flow into a bigger underground tank. The size of tank depends upon the family requirement as well as the quantity of rain in that area.