Drilling and Completion
Class I Industrial Waste Disposal Wells
Hazardous Waste Disposal
Non-Hazardous Waste Disposal
Class II Wells
Saltwater Disposal (SWD)
Acid Gas Injection (AGI)
Slurry Injection
Enhanced Oil Recovery (EOR)
Reservoir Gas Storage
Depleted Reservoir Storage
Aquifer Storage
Salt Cavern Storage
Liquid Hydrocarbons and Refined Products
Natural Gas
Compressed Air Energy Storage (CAES)
Hydrogen Storage
Ammonia Storage
Waste Disposal
Class III Solution Mining Wells
Domal Salt Cavern/Solution Mining
Bedded Salt Cavern/Solution Mining
Potash Solution Mining
Trona Solution Mining
Battery Minerals (Lithium and Barium)
Class V Wells
Stratigraphic Test
Class VI Geologic Sequestration Wells
CO₂ Sequestration
Monitoring Wells
In Zone
Above Zone
Underground Source of Drinking Water (USDW)