| #D001 | | Transitional authorization | extension to allow facilities to upgrade their systems to meet national standards | high |
| #D002 | | Temporary bypass authorization | authorization to exceed the standards for maintenance or construction work | high |
| #D003 | | Temporary authorization to deposit un-ionized ammonia | authorization for systems that have issues with ammonia but meet the other effluent limits | high |
| #D004 | | WSER | Wastewater Systems Effluent Regulations | high |
| #D005 | | Completed | means that a wastewater system has been upgraded to meet the Wastewater Systems Effluent Regulations (WSER) effluent quality standards or has been decommissioned | high |
| #D006 | | Expired | means extension deadline has passed and the transitional authorization is no longer valid | high |
| #D007 | | In progress | means that the wastewater system still has an active transitional authorization in place | high |
| #D008 | | Category 1 | Lower risk releases | high |
| #D009 | | Category 2 | Medium risk releases | high |
| #D010 | | Category 3 | Higher risk releases | high |
| #D011 | | physical or biological treatment | wastewater effluent undergoes treatment to remove suspended solids or organic matter before deposit | high |
| #D012 | | no treatment | wastewater effluent receives no treatment or only preliminary treatment before deposit | high |
| #D013 | | wastewater mixed with stormwater | construction or maintenance work temporarily reduces the treatment capacity of the system. As a result, untreated wastewater mixed with stormwater can overflow during rainfall events | high |