Strict vigil and stringent law have spared river Hooghly from bearing the brunt of pollution triggered by idol immersion, but local waterbodies were not so lucky.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/ghats-cleaned-local-ponds-mess
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/times-india-kolkata
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-pollution
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/west-bengal
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/hoogly
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/river-pollution
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-pollution-control
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/festival
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/religious-beliefs