Water production at the Chandrawal and Wazirabad water treatment plants was resumed on Wednesday after the ammonia levels in the Yamuna were restored to the permissible levels.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/water-production-capitals-treatment-plants-resumed
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/hindu-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-pollution
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/yamuna
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-treatment-technology
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/water-supply
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi-jal-board-djb