From river of life to river of death

Pollution of a major river in the great South Nyanza has been blamed for recent cholera deaths in Migori County. River Riana, shared by three counties - Kisii, Migori and Homa Bay - was identified as the source of the killer waters.

But how did this formerly clean-water river become a source of deadly dirty water? Samuel Owiti, 73, remembers how River Riana was clean in the early 90s before increased human activity started polluting it.