Solid and hazardous wastes are sometimes incinerated before disposal. The ash residue is then taken to a landfill. Incineration is often used to dispose of medical waste. Another land disposal method routinely used in the Industrial Corridor is deepwell injection. Deepwell injection is a disposal method by which liquid wastes are forced underground.
Injection is used to dispose of both hazardous and non-hazardous waste.
This data has become an important source of information about the types and quantities of chemicals which are being released into Louisiana's environment. In 1994, Louisiana ranked fifteenth nationally in land discharges. Hazardous land discharges have increased since 1987. The pounds discharged in 1987 were about 98 thousand. This amount increased to over 2 million pounds in 1994.