Segment I: Himalayan: From source to Tajewala; 172 km
Segment II: Upper: From Tajewala to Wazirabad; 224 km
Segment III: Delhi: Wazirabad barrage to Okhla barrage; 22 km
Segment IV: Eutrophicated (Eutrophication is the result of astronomical BOD and other micropollutant levels): Okhla barrage to Chambal confluence; 490 km
Segment V: Diluted: Chambal confluence to Allahabad; 468 km
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/segments
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/down-earth
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/river-pollution
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/yamuna
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/drinking-water
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/pesticide-residues
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/agra-d