- There are 163 Class I hazardous waste injection wells located at 51 facilities. Most are found in Texas (78) and Louisiana (18). Eleven of the facilities are commercial hazardous waste injection facilities. These are the only facilities that can accept hazardous waste generated offsite for injection. Ten of them are located in the Gulf Coast region while one is located in the Great Lakes region.
- Hazardous and Solid Waste Amendments to RCRA made UIC regulations (1988) more stringent for Class I hazardous wells.