The petition filed by Mukta Sathe and other citizens, including students, was heard by the western zone bench of the NGT in Pune.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/ngt-asks-railway-expedite-bio-toilet-installation-2019
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/asian-age-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/maharashtra
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/mumbai
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/toilets
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/rail-transport
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/national-green-trbunal-ngt
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/sanitation