Wastewater in refineries may be highly contaminated given the number of sources it can come into contact with during the refinery process (such as equipment leaks and spills and the desalting of crude oil). This contaminated water may be process wastewaters from desalting, water from cooling towers, storm water, distillation, or cracking. It may contain oil residuals and many other hazardous.

TRL Waste water technologies can help in reducing the Water and Soil Contamination problem to an large extent.