Dutch astronomers and ecologists are working with Leiden University on a project, MONOCLE, that allows people to measure the quality of their water, simply by taking a photo with their smartphones.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/dutch-scientists-developing-smart-app-measure-water-pollution
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/planet-ark-australia
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-pollution
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/netherlands
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/scientists
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-pollution-control
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/tanzania
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/africa
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/science-and-technology