In 1700s Maniyan clan people from Mohanur, Namakkal Dist (With deity of Chellandi amman and Navaladi Karuppusamy) in need of resources migrated again from there.

From 2005 to 2008, drought-like conditions existed due to rain scarcity; crop and coconut trees dried away, and most of them died.

Now the river is a large sewage and banks are full of the Prosopis juliflora (seemai karuvel, vilayati babul), an invasive thorn bush.

So with no proper livelihood educated people move to towns, farmers shift to nearby villages with better transport.

From land holding Farmers to Wage workers in mills of Tirupur, thus feeding the market of cheap labor.

According to the state Pollution Control Board the accumulated pollution loads between 1980 and 2000 are as follows:[2] A study, called 'Biological Monitoring of Genotoxic Hazards Related to Textile Dyeing Industries,' by the PSG College of Arts and Science in Coimbatore, showed that tadpoles in Noyyal had significant DNA damage and that fish organs were highly contaminated.

Groundwater samples they collected revealed amines, which are capable of inducing DNA strand breaks in humans.

Another report from the University of Madras (Chennai) notes that the Noyyal is dead, because of inflow of industrial effluents.

A report by the Linkoping University in Sweden notes that till the mid-90s, "Approximately 90 million litres of water was used and discharged from the dyeing and bleaching industry in Tirupur.

While common effluent treatment plants have been set up since – treating only a fraction of the 100,000 million litres daily – the damage has been done.