water pollution

This report tries  to  summarize  the  information  available  about the  different costs of  water pollution in India. The variety of these costs comes not only from the variety of pollution dealt with (domestic, industrial, agricultural …) but also from the method used to calculate these costs. The notion of cost is quite complex. Formally, it implies the comparison between two scenarios, and the assessment of the welfare of a group of economic agent in both scenarios. In the case of water pollution, the problem can be  represented by a resource which provides environmental services, and economic agents that benefit from these services. Calculating a formal cost of water pollution would imply to model the different  equilibrium at stake, and to deduct from these different equilibrium the effect of a difference in the ambient pollution on the aggregated welfare. To determine these equilibriums, one would need hydrological as well as agronomic, medical and 
behavioural models that are not available as for now in India

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