Nalco actually happens to be an Ecolab company. The company was founded in 1928 and is based in Naperville, Illinois. It is a supplier of water, energy and air improvement solutions and services for industrial and institutional markets. It on works selling different products and services that are devised to lessen water, energy and other natural resource consumption, and augment air quality, diminish environmental releases as well as develop end products and productivity. It became a subsidiary of Ecolab Inc. in December 2011 after the completion of the US$5.4 billion acquisition by Ecolab.