Are there really more mobile phones than toilets in slums?

Rural Development Minister Jairam Ramesh had once commented that there are more toilets than mobile phones in India. With the census board putting out numbers for the "slum census" of 2011, it might be useful to look at penetration of toilets and mobile phones in slums! The data on the website is only state-wise but it suggests that the Minister's comment is untrue in the slums of most states.
Data Source: Census 2011 

Rural Development Minister Jairam Ramesh had once commented that women prefer to have mobile phones than have toilets. With the census board putting out numbers for the “slum census” of 2011, it might be useful to look at penetration of toilets and mobile phones in slums! The data on the website is only state-wise but it suggests that in most states, more slum-dwellers have access to toilets than to mobile phones.

PS: The original post has quoted the Minister incorrectly. This has been remedied.

Exponential* Growth in Toilet Ownership in Karnataka

How rural sanitation has improved in Karnataka's districts and taluks between 2001 and 2011. The graph shows that there is a strong link between the magnitude of a district or a taluk's improvement in the last decade to its starting position in 2001. While not conclusive, this is evidence for a possible peer effect in adoption of toilets in rural areas
How rural sanitation has improved in Karnataka’s districts and taluks between 2001 and 2011. The graph shows that there is a strong link between the magnitude of a district or a taluk’s improvement in the last decade to its starting position in 2001. While not conclusive, this is evidence for a possible peer effect in adoption of toilets in rural areas

Contributed by Pavan Srinath

Cross-posted on Catalyst, with more detailed analysis.

* Time for some wonkish gyaan. People normally tend to describe any superlinear growth as “exponential”. However, that is incorrect. Exponential growth is one that follows a particular formula, like this one.

Here, we see that the growth in toilets in a particular time period is proportional to the number of toilets at the beginning of the time period. So the growth of toilets can be described by the following equation, which as you can see represents exponential growth.

Change in number of toilets is proportional to initial number of toilets, thus representing exponential growth
Change in number of toilets is proportional to initial number of toilets, thus representing exponential growth