[citation needed] Cauvery is the major river flowing in the region and the composite district has a canal system covering just 47 km stretch and ayacut of 11,610 ha.

The ground water resource through tubewells and wells contribute nearly 68% of irrigated area command.

The Onion cultivation villages are Erattai malai sandhu (Keelakkarai), Esanai, Elambalur, Nakkasalem, Ammapalayam, Siruvayalur, Chettikulam, Kalarampatty, Melapuliyur, Navalur, K.Pudur, Arumbavur, Irur, Alathur, Padalur, etc.

[citation needed] Currently, Perambalur district is the top maize and Onion (small) producer in Tamil Nadu, with 27% and 50% of the state's share, respectively.

[3] Perambalur is planning to set up multi-product SEZ over an area of 5000 acres (20 km2) specializing in high-technology by SREI Infrastructure Finance Ltd through a joint venture with TIDCO (Tamil Nadu Industrial Development Corporation).

The SEZ will have linkages to Cuddalore, Pondicherry and Chennai ports, railway line and Tiruchirapalli Airport.

This SEZ will bring in high-technology industries, MROs, biotechnology, pharmaceutical companies, textile and leather clusters.

[citation needed] MRF Limited commissioned its 8th plant at Naranamangalam, Perambalur on 2011 for the production of conventional tyres.

According to 2011 census, Perambalur district had a population of 565,223 with a sex-ratio of 1,003 females for every 1,000 males, much above the national average of 929.

World peace temple ( Ulaga samathana aalayam) will be built in kottarai village by veerathuravi maamunivar.