If you haven’t seen this yet, the Wall Street Journal featured an article Mapping the Bacteria in New York’s Subways Data. It is a great map/infographic that allows the user to navigate the individual subway stations in New York City and see what bacteria the crowd sourced sampling found.
A screenshot of the interface.
I was messing around with the map and looking at how it was created. I was also curious if the data was available. It was a little hidden but I was able to track down the data sources contributing to the map. I have yet to look at this data intimately so if you have any questions I’m probably not the best person to speak to.