The Pannagam thodu is a river in the state of Kerala in southern India,[1] forming near Madapattu and flowing north for 30 kilometers before joining the Meenachil River close to Punnathara.
Pannagam means snake, as the river flows like a curled snake through the many surrounding hills.
Environmental issues
The Pannagam thodu is mostly free from water pollution. There are a few issues affecting the water pollution, mainly from disposal of urban and domestic waste into the streams.