Rajasthan owes Punjab billions of rupees for the water it has been receiving through Rajasthan canal for more than 40 years now.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/rajasthan-owes-punjab-billions-rupees-water
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/tribune-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-resources
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/beas
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ravi
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/canal-irrigation
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/punjab
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/rajasthan