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    Chennai's water crisis mapped across 200 wards - not a single river meets safe water quality standards [OC]
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    Chennai’s water crisis mapped across 200 wards – not a single river meets safe water quality standards [OC]

    Chennai’s water crisis mapped across 200 wards – not a single river meets safe water quality standards [OC]

    Posted by SmOokey16

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    1. SmOokey16 on

      I combined data from 6 Indian government sources to map Chennai’s (Tamil Nadu, India) water situation at the ward level:

      * CMWSSB (reservoir storage)
      * CGWB/OpenCity (groundwater depth)
      * CPCB (river water quality)
      * GCC CFLOWS (flood hazard zones)
      * GCC (storm water drainage)
      * CMWSSB (sewerage infrastructure)

      1,635 water bodies mapped. 14 wards face both groundwater stress and high flood risk. All four rivers – Cooum, Adyar, Kosasthalaiyar, Otteri Nullah – exceed safe pollution limits.

      Tools: Next.js, Python, Leaflet, Claude (AI narratives)

      Interactive version: [neervazhvu.org](http://neervazhvu.org)
      Source code: [github.com/SundareshPrasanna/neer-vazhvu](http://github.com/SundareshPrasanna/neer-vazhvu)